2001 Lexus LS 430

2001 ENGINES 4.3L V8

2001 ENGINES

4.3L V8

ENGINE IDENTIFICATION

NOTE: For repair procedures not covered in this article, see ENGINE OVERHAUL
PROCEDURES article in GENERAL INFORMATION.

CAUTION: On LS430 models with electronic modulated air suspension, ensure

ignition switch is turned to OFF position before raising vehicle.

NOTE: When servicing engine, references to right and left refers to engine sides as
viewed from rear of engine (drive plate end).

Engine serial number is stamped on front of cylinder block. See Fig. 1 .

ENGINE IDENTIFICATION CODE

Engine Code
4.3L V8 3UZ-FE

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Fig. 1: Locating Engine Serial Number

Courtesy of TOYOTA MOTOR CORP.

ADJUSTMENTS
VALVE CLEARANCE ADJUSTMENT

NOTE: Adjust valve clearance with engine cold.

1. Disconnect negative battery cable. Remove engine "V" bank and side covers. Remove air cleaner and
intake air duct. Remove ignition coils. Remove retaining bolt and remove engine oil dipstick and guide
tube. Remove retaining bolt and remove transmission dipstick and guide tube.
2. Remove PCV hose from LH valve cover. Remove 2 EVAP hoses and bracket from LH valve cover.
Remove wire harness retaining clamp from LH valve cover bracket. Remove bolt and remove wire
harness clamp bracket from front RH camshaft bearing cap. Remove valve cover retaining bolts and
remove valve covers.
3. Rotate crankshaft clockwise so No. 1 cylinder is at TDC on compression stroke. No. 1 is front cylinder on
left side when viewed from rear of engine. Ensure timing mark on crankshaft pulley aligns with "0" mark
on timing belt cover, and dot marks on LH camshaft gears align with each other. See Fig. 2 .
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Fig. 2: Aligning Camshaft Sprocket Timing Marks

Courtesy of TOYOTA MOTOR CORP.

4. If timing marks do not align, rotate crankshaft clockwise one revolution, and recheck alignment.
5. Using a feeler gauge, measure and record valve clearance between valve lifter and camshaft on specified
valves shown. See Fig. 3 . Ensure valve clearance is within specification. See VALVE CLEARANCE
SPECIFICATIONS table.

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Fig. 3: Checking Valve Clearance With No. 1 Cylinder At TDC

Courtesy of TOYOTA MOTOR CORP.

6. Rotate crankshaft clockwise one full revolution (360 degrees), and realign crankshaft pulley timing mark
with "0" mark on timing belt cover. Measure and record valve clearance between valve lifter and
camshaft on specified valves as shown. See Fig. 4 . Ensure valve clearance is within specification. See
VALVE CLEARANCE SPECIFICATIONS table.

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Fig. 4: Checking Valve Clearance With No. 6 Cylinder At TDC

Courtesy of TOYOTA MOTOR CORP.

VALVE CLEARANCE SPECIFICATIONS (1)

Application In. (mm)
Exhaust Valve .010-.014 (.25-.36)
Intake Valve .006-.010 (.15-.25)
(1) Adjust valve clearance with engine cold.

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7. If valve clearance requires adjustment, remove timing belt. See TIMING BELT under REMOVAL &
INSTALLATION. Remove camshafts. See CAMSHAFT under REMOVAL & INSTALLATION.
Carefully remove valve lifter and adjusting shim. DO NOT allow adjusting shim to drop into cylinder
head when removing lifter.
8. Using an outside micrometer, measure and record thickness of adjusting shim removed. Using measured
valve clearance, added to measured shim thickness, select proper replacement adjusting shim. See Fig. 5
and Fig. 6 . Install NEW selected adjusting shim and reinstall lifter.
9. Reinstall camshafts. See CAMSHAFTS under REMOVAL & INSTALLATION. Reinstall timing belt.
See TIMING BELT under REMOVAL & INSTALLATION. Recheck valve clearance.
10. To complete installation, reverse removal procedure. Tighten fasteners to specification. See TORQUE
SPECIFICATIONS .

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Fig. 5: Exhaust Valve Adjusting Shim Selection Chart

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Courtesy of TOYOTA MOTOR CORP.

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Fig. 6: Intake Valve Adjusting Shim Selection Chart

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Courtesy of TOYOTA MOTOR CORP.

TROUBLE SHOOTING
To trouble shoot engine mechanical components, see ENGINE MECHANICAL in BASIC TROUBLE
SHOOTING article in GENERAL INFORMATION.

REMOVAL & INSTALLATION

NOTE: For reassembly reference, label all electrical connectors, vacuum hoses and
fuel lines before removal. Place mating marks on engine hood and other major
assemblies before removal.

WARNING: To prevent air bag deployment, disconnect negative battery cable, and
wait at least 90 seconds before working on vehicle.

CAUTION: On LS430 models with electronic modulated air suspension, ensure

ignition switch is turned to OFF position before raising vehicle.

CAUTION: When battery is disconnected, vehicle computer and memory systems

may lose memory data. Driveability problems may exist until computer
systems complete a relearn cycle.

FUEL PRESSURE RELEASE

Working from inside luggage compartment, disconnect fuel pump connector on top of fuel tank. Start engine.
When engine stops running, turn ignition off, and disconnect negative battery cable. Place suitable container
under fuel line. Cover fuel line connection with shop towel. Slowly loosen fuel line connection to release fuel
pressure. Once fuel pressure is released, plug openings with rubber plugs. Reconnect fuel pump connector.

COOLING SYSTEM BLEEDING

1. Slowly pour coolant into radiator reservoir until full. Install radiator and radiator reservoir filler caps.
Start engine. Turn on vehicle heater. Increase engine speed to 2000-2500 RPM and run until engine
reaches normal operating temperature. Stop engine.

NOTE: DO NOT use an alcohol type coolant or plain water alone. Mix coolant with
demineralized or distilled water.

2. Wait until engine coolant cools down. Remove radiator and reservoir caps and fill system with coolant
until full. Install radiator and reservoir filler caps.

ENGINE

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NOTE: Remove engine and transmission as an assembly.

WARNING: To prevent air bag deployment, disconnect negative battery cable, and
wait at least 90 seconds before working on vehicle.

Removal (GS430)

1. Release fuel pressure. See FUEL PRESSURE RELEASE . Remove hood. Remove battery cover and
battery. Raise and support vehicle. Remove engine under covers. Remove 6 bolts and remove suspension
brace. Drain cooling system and engine oil. Lower vehicle.
2. Remove engine "V" bank and side covers. Remove intake air duct and air cleaner assembly. Remove
radiator and cooling fans assembly. Remove generator drive belt. Disconnect all necessary electrical
connections, body ground straps, control cables, coolant hoses, vacuum hoses and fuel lines from engine.
Disconnect power steering hoses from power steering pump.
3. Remove ECM cover and ECM hood at left front fender. Disconnect 3 electrical connectors, 4 wire
harness connectors and 2 junction connectors from ECM. Disconnect grommet and engine wire from
ECM box.
4. Raise and support vehicle. Remove 2 heated oxygen sensors. Remove front and center exhaust pipes.
Remove both three-way catalytic converters (TWC) and gaskets. Remove center front floor brace.
Remove heat insulators. Disconnect ATF cooler lines from transmission. Remove driveshaft. Lower
vehicle.
5. Disconnect A/C compressor harness connector. Disconnect wire clamp from wire bracket on A/C
compressor. Remove bolt, nut and A/C compressor stay. Remove bolt, and remove wire bracket from
A/C compressor. Remove A/C compressor from engine and suspend aside. Disconnect power steering oil
pressure switch connector. Remove 2 bolts and nut and remove power steering pump from engine.
Remove 2 clips and remove transmission control rod.
6. Place steering wheel in straight-ahead position. Remove bolt holding sliding yoke to intermediate shaft.
Remove bolt and disconnect 2 power steering oil tubes from front of vehicle frame. Remove 4 bolts, and
disconnect power steering gear from front of vehicle frame. Suspend power steering gear securely.
Disconnect sliding yoke from intermediate steering shaft.
7. Remove "V" bank cover bracket from engine hanger. Attach chain hoist to engine hangers. Remove nuts
holding front engine mounts to front suspension crossmember. Remove 4 bolts, 4 nuts and rear engine
mounting member. Lift engine and transmission assembly out of vehicle slowly and carefully, ensuring
engine is clear of all wiring, hoses and cables. Remove 10 transmission-to-engine bolts. Remove
transmission and torque converter from engine as an assembly. Remove bolts, front spacer, drive plate
and rear spacer.

Installation

1. Attach chain hoist to engine hangers. Slowly lower engine and transmission assembly into engine
compartment. Insert stud bolts of front engine mounting brackets into bolt holes of front suspension
crossmember. Ensure engine is level.
2. Install rear engine mounting member with the 4 bolts and 4 nuts. Tighten fasteners to specification. See
TORQUE SPECIFICATIONS . Install 4 nuts holding engine mounting brackets to front suspension
crossmember. Remove chain hoist from engine. Install "V" bank cover bracket to engine hanger.
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3. Connect sliding yoke to intermediate shaft. Install bolt holding sliding yoke to intermediate shaft, and
tighten to specification. See TORQUE SPECIFICATIONS . Install power steering gear with 4 bolts.
Install power steering tube retainer. Install front suspension member brace with 6 bolts. Install
transmission control rod with 2 clips. Install driveshaft.
4. Install ATF cooler lines to transmission. Install heat insulators for front side of front exhaust pipe. Install
front floor brace. Install remaining heat insulators. Install both TWC's using NEW gaskets and nuts, and
tighten nuts to specification. See TORQUE SPECIFICATIONS . Install oxygen sensors. Ensure sensor
wire is not twisted after installation. Install center and front exhaust pipes.
5. Install power steering pump. Connect power steering oil pressure switch harness connector. Install A/C
compressor, compressor stay and wire bracket. Connect A/C compressor harness connector. Install wire
retaining clamp. Tighten fasteners to specification. See TORQUE SPECIFICATIONS .
6. Install engine wire grommet to ECM box. Connect 3 ECM connectors, 4 wire harness connectors and 2
junction connectors. Install ECM hood and cover. Connect all necessary electrical connectors, brackets,
control cables, coolant hoses, vacuum hoses and fuel lines.
7. Install generator drive belt. Install radiator assembly. Install intake air duct. Install air cleaner assembly.
Fill crankcase with engine oil. Fill and bleed cooling system. See COOLING SYSTEM BLEEDING .
8. Start engine and check for leaks. Install engine "V" bank and side covers. Install engine undercovers.
Install hood. Tighten all nuts and bolts to specification. See TORQUE SPECIFICATIONS .

Removal (LS430)

1. Release fuel pressure. See FUEL PRESSURE RELEASE . Remove hood. Remove engine "V" bank and
side covers. Remove battery cover and battery. Remove air cleaner assembly and intake air duct. Raise
and support vehicle. Remove engine under covers. Disconnect ATF cooler lines from radiator. Drain
cooling system and engine oil. Lower vehicle.
2. Remove drive belt. Disconnect upper and lower radiator hoses from engine. Disconnect all necessary
electrical connectors, body ground straps, coolant hoses, vacuum hoses, control cables and fuel lines from
engine. Disconnect cooling fan harness connectors. Remove radiator assembly.
3. Disconnect power steering hoses from pump. Remove power steering pump and oil reservoir from
vehicle. Remove A/C compressor from engine with hoses attached, and suspend aside. Remove ECM
cover. Disconnect ECM harness connectors.
4. Raise and support vehicle. Disconnect harness connectors from heated oxygen sensors. Remove front and
center exhaust pipes and tail pipes. Remove both three-way catalytic converters (TWC) from exhaust
manifolds.
5. Remove exhaust pipe heat insulators. Remove center floor crossmember brace. Paint reference mark on
drive shaft flanges at transmission and rear differential flange for reassembly reference.
6. Remove driveshaft center bearing bolts and adjusting washers. Adjusting washers are located between
driveshaft center bearing and frame. Remove driveshaft flange bolts. Remove driveshaft.
7. Disconnect sliding yoke from intermediate steering shaft. Disconnect power steering hoses from steering
gear. Remove front stabilizer bar. Disconnect shock absorbers from lower control arms.
8. Disconnect height level sensor linkage from lower control arms. Remove 2 bolts and disconnect lower
control arm from steering knuckle.
9. Attach chain hoist to engine hangers and support engine. Remove 4 bolts and disconnect rear mounting
crossmember from body. Remove 4 bolts and disconnect rear mounting crossmember from body.
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10. Disconnect shift control rod from transmission shift lever. Remove 4 bolts and disconnect front
suspension member from body. Lower engine and transmission as an assembly from vehicle.
11. Disconnect engine wire from transmission. Remove engine oil dipstick and guide tube. Remove 2 bolts
and remove flywheel access cover. Turn crankshaft pulley bolt to gain access to each bolt. Remove 6
torque converter-to-flywheel bolts.
12. Remove 10 transmission-to-engine bolts. Remove transmission and torque converter from engine as an
assembly. Remove bolts, front spacer, drive plate and rear spacer.

Installation

1. Apply Three Bond 1234 to threads of drive plate bolts. Install drive plate with front and rear spacers on
crankshaft and tighten bolts to specification in 2 steps. See TORQUE SPECIFICATIONS . Install
transmission to engine. Apply Three Bond 1234 to threads of torque converter bolts and install the Black
colored bolt first. Install flywheel access cover.
2. Install front suspension crossmember to engine. Using a chain hoist, lift engine and transmission
assembly into vehicle. Connect front suspension crossmember to body. Install rear mounting
crossmember to body. Remove chain hoist from engine.
3. Connect lower control arm to steering knuckle. Connect height level sensor linkage lower control arms.
Connect shock absorbers to lower control arms. Install front stabilizer bar. Install sliding yoke to
intermediate steering shaft. Install power steering hoses to steering gear.
4. Install driveshaft. Apply grease to center flexible bushing in ends of driveshaft before installing. Ensure
driveshaft flange reference marks align. Using NEW gaskets and retaining nuts, install TWC's on exhaust
manifolds. Install front and center exhaust pipes and tail pipes.
5. To complete installation, reverse removal procedure. Adjust control cables. Fill crankcase with engine oil.
Fill and bleed cooling system. See COOLING SYSTEM BLEEDING .

CYLINDER HEAD & MANIFOLDS

Removal

1. Release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect negative battery cable. Drain
cooling system. Remove engine "V" bank and side covers. Remove air cleaner assembly and intake air
duct. Disconnect EVAP hose from charcoal canister. Remove radiator assembly. Remove 4 "V" bank
cover mounting brackets.
2. Remove throttle body. Disconnect all necessary fuel lines, vacuum hoses and electrical connectors from
intake manifold and cylinder heads. Remove bolts and disconnect wire harness retaining clamps from
upper intake manifold, and LH camshaft bearing cap. Remove 2 bolts and disconnect wire harness
retainer from RH cylinder head, and rear water bypass manifold.
3. Disconnect 8 injector connectors. Remove 6 bolts and 4 nuts, and remove intake manifold assembly.
Disconnect timing belt from camshaft sprockets. TIMING BELT . Remove camshaft sprockets. Remove
camshaft position sensor. Remove rear timing belt plates from both cylinder heads.
4. Remove power steering pump from engine and suspend aside. Raise and support vehicle. Disconnect
front exhaust pipe from three-way catalytic converters (TWC) on exhaust manifolds. Remove TWC's
from exhaust manifolds. Lower vehicle. Remove water bypass pipe. Disconnect water temperature
sender. Remove 4 bolts and remove water bypass manifold.
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5. Remove ignition coils. Remove Variable Valve Timing (VVT) sensors. Remove engine hangers. Remove
engine and transmission oil dipsticks and guide tubes. Remove valve covers. Remove camshaft timing oil
control valve from both front camshaft bearing caps.
6. To avoid valve/piston interference, ensure timing mark on crankshaft pulley is aligned with center of
crankshaft pulley bolt and center of No. 2 timing belt idler pulley bolt. See Fig. 7 . Remove camshafts.
See CAMSHAFT .

Fig. 7: Aligning Crankshaft Pulley Timing Mark With Pulley Bolts

Courtesy of TOYOTA MOTOR CORP.

7. Disconnect oxygen sensor harness connectors. Disconnect body ground leads from rear of each cylinder
head. Remove oxygen sensor wire harness bracket from LH cylinder head. Remove wire harness bracket
from RH cylinder head.
8. Loosen cylinder head bolts evenly in several steps, in sequence. See Fig. 8 . Remove cylinder head bolts,
washers, cylinder head and cylinder head gasket.

CAUTION: To prevent cylinder head warpage or cracking, loosen cylinder head

bolts evenly, in proper sequence. See Fig. 8 . DO NOT allow cylinder
head bolt washers to drop into engine through either end of cylinder
head.

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NOTE: If cylinder head removal is difficult, carefully pry between cylinder head
and projected area near front of cylinder block. DO NOT damage sealing
surfaces on cylinder block and cylinder head.

Fig. 8: Cylinder Head Bolt Removal Sequence

Courtesy of TOYOTA MOTOR CORP.
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9. Remove heat insulators. Remove exhaust manifolds and gaskets from cylinder head. Using a valve spring
compressor, remove keepers, spring retainers, springs and valves. Using needle nose pliers, remove valve
stem oil seals.

Inspection

1. Thoroughly clean gasket material from cylinder block and cylinder head mating surfaces. Using a straight
edge and feeler gauge, check cylinder head sealing surface for warpage. Check cylinder head intake and
exhaust manifold sealing surfaces for warpage. Replace cylinder head if warpage exceeds specification.
See CYLINDER HEAD table under ENGINE SPECIFICATIONS.
2. Check intake and exhaust manifold sealing surfaces for warpage. Replace manifold if warpage exceeds
specification. See MANIFOLD WARPAGE SPECIFICATIONS table.

MANIFOLD WARPAGE SPECIFICATIONS

Application Maximum Warpage - In. (mm)
Exhaust Manifold .0197 (.500)
Intake Manifold .0059 (.150)

3. Using a dye penetrant, check cylinder head sealing surface, and intake and exhaust ports for cracks. If
cracked, replace cylinder head. Using outside calipers, measure cylinder head bolt diameter above bolt
threads. Replace cylinder head bolt if diameter is less than .3819" (9.70 mm).
4. Inspect cylinder block deck surface for warpage. Replace cylinder block if deck warpage exceeds
specification. See CYLINDER BLOCK table under ENGINE SPECIFICATIONS. Inspect camshaft and
components. See CAMSHAFT .
5. Using a valve guide bushing brush and cleaning solvent, clean valve guides. Using an inside caliper
gauge, measure inside diameter of valve guides. Using an outside micrometer, measure outside diameter
of valve stems. Using the 2 measurements, determine valve guide oil clearance. If clearance is not within
specification, replace valve and/or valve guide. See CYLINDER HEAD under ENGINE
SPECIFICATIONS.
6. Inspect valve lifters for damage. Measure outside diameter of valve lifter and inside diameter of valve
lifter bore in cylinder head to determine valve lifter oil clearance. If clearance is not within specification,
replace components as necessary. See VALVE LIFTERS table under ENGINE SPECIFICATIONS.

Installation

1. Using Valve Stem Oil Seal Replacer (09201-41020), install valve stem oil seals onto valve guides. Install
valves, valve spring seats, valve springs, spring retainers and keepers.

NOTE: When installing exhaust manifold gasket, ensure White paint mark on
gasket faces manifold.

2. Install NEW exhaust manifold gaskets on cylinder head, so White paint mark on gasket faces exhaust
manifold. Install exhaust manifolds. Install NEW exhaust manifold nuts and tighten to specification. See
TORQUE SPECIFICATIONS . Install heat insulators.
3. Rear side of cylinder head gaskets are marked "3R" and "3L" to distinguish right and left banks. Install
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NEW cylinder head gasket on correct side of cylinder block. Position cylinder heads on cylinder block
over locating dowels in block.
4. Apply light coat of oil to threads and underside of cylinder head bolts. Install washers on cylinder head
bolts. Install cylinder head bolts and tighten to specification in 2 steps, in sequence. See Fig. 9 . See
TORQUE SPECIFICATIONS .

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Fig. 9: Cylinder Head Bolt Tightening Sequence

Courtesy of TOYOTA MOTOR CORP.

5. Install body ground leads to rear of cylinder heads. Install wire harness brackets to cylinder heads.
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Connect 2 heated oxygen sensor harness connectors. Install valve lifters and adjusting shims.
6. Install camshafts. See CAMSHAFT . To avoid valve/piston interference, position crankshaft pulley
timing mark with center of crankshaft pulley bolt and center of No. 2 timing belt idler pulley bolt. See
Fig. 7 . Check and adjust valve clearance. See VALVE CLEARANCE ADJUSTMENT under
ADJUSTMENTS.

NOTE: There are 2 half-circular camshaft plugs for each cylinder head. Ensure
both half-circular plugs are installed in each cylinder head.

7. Apply a continuous bead of silicone sealant to mating surface of plug before installation. Install 4 half-
circular camshaft plugs to cylinder head.
8. Apply silicone sealant to outer edges of front camshaft bearing caps at cylinder head. Install NEW
gaskets onto valve covers. Install valve covers. Install seal washers and valve cover bolts. Tighten bolts
evenly to specification, in several passes. See TORQUE SPECIFICATIONS .
9. Install wire harness clamp bracket to right front camshaft bearing cap. Install engine hangers, VVT
sensors, and camshaft timing oil control valve. Install engine and transmission oil dipstick guide tubes.
10. Using NEW gaskets, install front and rear water manifolds. Tighten nuts alternately to specification. See
TORQUE SPECIFICATIONS . Connect coolant hoses to water manifolds. Connect engine coolant
temperature sensor. Using a NEW "O" ring, install water by-pass pipe to water pump. Connect heater
hose to water by-pass pipe.
11. Using NEW gaskets and nuts, install 2 TWC's to exhaust manifolds. Install front exhaust pipe to the 2
TWC's. Install power steering pump. Install timing belt rear plates to cylinder heads. Install camshaft
position sensor. Install camshaft sprockets. Install timing belt. See TIMING BELT .
12. Install NEW intake manifold gaskets onto cylinder heads, with White paint mark on gaskets facing
upward. Ensure holes in gasket align with holes in cylinder head. Install intake manifold assembly onto
cylinder heads. Tighten bolts to specification. See TORQUE SPECIFICATIONS .
13. Connect 8 injector harness connectors. Install wire harness retainers. Connect EVAP hoses. Connect all
wire harness connectors, emission, coolant and vacuum hoses removed. Connect fuel lines. Install throttle
body. Connect and adjust accelerator cable.
14. Install radiator assembly. Install intake air duct and air cleaner assembly. Fill engine with coolant. Check
engine oil level. Connect negative battery cable. Start engine and check for coolant and fuel leaks. Bleed
cooling system. See COOLING SYSTEM BLEEDING under ADJUSTMENTS.
15. Install engine under cover. Install engine "V" bank and side covers.

CRANKSHAFT FRONT SEAL

Removal & Installation (Oil Pump Installed)

1. Remove timing belt and crankshaft sprocket. See TIMING BELT . Using a knife, cut seal lip from
crankshaft front seal. Carefully pry crankshaft front seal from oil pump body. DO NOT damage sealing
surfaces.
2. To install, apply grease to sealing lip of crankshaft front seal. Using a hammer and Seal Installer (SST
09316-60011), install NEW crankshaft front oil seal until seal surface is even with oil pump body. To
install remaining components, reverse removal procedure.

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Removal & Installation (Oil Pump Removed)

Using a screwdriver, pry crankshaft front seal from oil pump body. To install, use a hammer and Seal Installer
(SST 09316-60011). Install NEW crankshaft front oil seal until seal surface is even with oil pump body. Apply
grease to sealing lip of crankshaft front seal.

TIMING BELT

Removal

1. Remove engine undercover. Drain engine coolant. Remove engine "V" bank and side covers. Remove air
cleaner assembly and intake air duct. Remove drive belt. Remove radiator and cooling fans assembly.
Disconnect water by-pass hoses from by-pass pipe.
2. Remove wire harness from retainers on timing belt covers. Disconnect camshaft position sensor harness
connector. Remove LH No. 3 timing belt cover and gasket. See Fig. 10 . Remove RH No. 3 timing belt
cover and gasket.

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Fig. 10: Exploded View Of Timing Belt Components (1 Of 2)

Courtesy of TOYOTA MOTOR CORP.
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Fig. 11: Exploded View Of Timing Belt Components (2 Of 2)

Courtesy of TOYOTA MOTOR CORP.

3. Remove No. 2 timing belt cover. Remove A/C compressor from engine, with hoses attached, and suspend
aside. Remove No. 1 drive belt idler pulley. See Fig. 10 .

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4. If reusing timing belt, ensure the 3 installation marks exist on timing belt before removal. See Fig. 12 . If
installation marks do not exist, place installation marks on timing belt and sprockets as shown. Rotate
crankshaft until pulley groove aligns with "0" mark on No. 1 timing belt cover. This position is about 50
degrees ATDC. DO NOT turn crankshaft, and loosen crankshaft pulley bolt.

Fig. 12: Locating Timing Belt Installation Marks

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

CAUTION: DO NOT rotate camshafts or crankshafts after timing belt is removed.

Piston/valve contact could occur and damage engine.

5. Ensure timing marks on camshaft sprockets and marks on timing belt rear plates are aligned. See Fig. 13 .
If timing marks do not align, turn crankshaft one revolution (360-degrees) and realign marks.

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Fig. 13: Aligning Camshaft Timing Marks With Rear Plates

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

6. Turn crankshaft pulley approximately 50-degrees clockwise, and align timing mark on crankshaft pulley
with center of crankshaft pulley bolt and center of No. 2 timing belt idler pulley bolt. See Fig. 14 .
Remove crankshaft pulley bolt. DO NOT turn crankshaft. Remove timing belt tensioner and dust boot.
See Fig. 10 .

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Fig. 14: Aligning Crankshaft Pulley Timing Marks

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

7. Using Variable Pin Wrench Set (09960-10010), loosen tension between left and right camshaft timing
sprockets by slightly turning RH camshaft timing pulley clockwise. Remove timing belt from camshaft
sprockets. Remove 4 bolts each and remove camshaft timing sprockets. Remove generator. Remove
power steering pump pulley. Remove drive belt tensioner. See Fig. 11 .
8. Using a suitable puller, remove crankshaft pulley. DO NOT turn crankshaft. Remove No. 1 (lower)
timing belt cover. See Fig. 11 . Remove timing belt guide and timing belt cover spacer. Remove timing
belt. Remove No. 1 and 2 timing belt idler pulleys. If necessary, remove crankshaft sprocket using a
suitable puller.

Inspection

NOTE: DO NOT bend, twist or turn timing belt inside out. DO NOT allow timing belt to
come into contact with oil, water or coolant. DO NOT allow any timing belt
tension when installing or removing camshaft sprocket retaining bolts.

1. Inspect timing belt for damaged teeth, cracking or oil contamination. Replace timing belt if damaged or
contaminated. Check idler pulleys for smooth rotation and signs of grease leakage. Replace idler pulleys
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if defective.
2. Inspect timing belt tensioner for signs of oil leakage. Replace timing belt tensioner if oil leakage exists.
Hold timing belt tensioner body so tension rod is facing upward, and press rod against a solid surface.
Replace timing belt tensioner if tension rod moves.

NOTE: Timing belt tensioner may weep a small amount of oil on rod seal under
normal conditions. If excessive amount of oil exists, replace timing belt
tensioner.

3. Measure timing belt tensioner rod protrusion from end of rod to edge of housing. See Fig. 15 . Replace
timing belt tensioner if rod does not protrude .374-.413" (9.50-10.49 mm) above housing. Inspect water
pump for leakage and smooth shaft rotation, and replace as necessary.
4. Using a press, slowly press timing belt tensioner rod down until hole in tension rod aligns with hole in
housing. Insert a small hexagon (Allen) wrench through holes to lock tension rod down for installation
purposes. See Fig. 16 .

Fig. 15: Measuring Timing Belt Tensioner Rod Protrusion

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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Fig. 16: Retracting & Locking Timing Belt Tensioner Rod Down
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Installation

1. Using a hammer and suitable driver, align keyway in crankshaft sprocket with key in crankshaft, and
install sprocket so flange on sprocket is facing toward cylinder block (if removed). DO NOT turn
crankshaft.
2. Apply Loctite 242 to threads of idler pulley pivot bolts. Install No. 1 and 2 timing belt idler pulleys, and
tighten bolts to specification. See TORQUE SPECIFICATIONS . Ensure idler pulleys move freely.
Ensure all sprockets and pulleys are clean and dry.
3. Align timing belt marks with marks on sprockets and install timing belt onto crankshaft sprocket and idler
pulleys. Install timing belt cover spacer and gasket. Install timing belt guide. See Fig. 11 . Install No. 1
timing belt cover. Using a hammer and suitable driver, install crankshaft pulley. Install drive belt
tensioner. Tighten bolts to specification. See TORQUE SPECIFICATIONS . Ensure crankshaft pulley
timing mark is still in alignment with the centers of pulley bolts. See Fig. 7 .
4. Install generator. Install power steering pump pulley. Align knock pin and install LH camshaft timing
sprocket so the "L" on sprocket is facing outward. Align knock pin and install RH camshaft timing
sprocket so the "R" is facing outward. Tighten bolts to specification. See TORQUE
SPECIFICATIONS .

NOTE: Ensure camshaft sprocket identification mark faces forward. Identification

mark is located on front of camshaft sprocket. Right camshaft sprocket
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contains an "R" identification mark, and left camshaft sprocket contains

an "L" identification mark.

5. Align marks and install timing belt onto LH camshaft sprocket. Using Variable Pin Wrench Set (09960-
10010), slightly turn LH camshaft sprocket until there is belt tension between crankshaft sprocket and LH
camshaft sprocket. Align marks and install timing belt onto RH camshaft sprocket. Install timing belt
tensioner and dust boot. Using pliers, remove the hexagon (Allen) wrench from tensioner.
6. Install crankshaft pulley bolt. Ensure all timing marks are still in alignment. Slowly rotate crankshaft
clockwise 2 revolutions and recheck all timing marks for proper alignment. See Fig. 13 . If timing marks
do not align, remove timing belt and reinstall. Tighten crankshaft pulley bolt to specification. See
TORQUE SPECIFICATIONS .

CAUTION: Always rotate crankshaft clockwise as viewed from front of engine.

DO NOT rotate crankshaft counterclockwise.

7. Install No. 1 drive belt idler pulley. Insert crankshaft position sensor wire between idler pulley and oil
pump. Install A/C compressor. Install No. 2 timing belt cover. Install No. 3 (RH) timing belt cover and
gasket. Install 2 power steering air hoses to clamp on No. 3 (RH) timing belt cover. Install No. 3 (LH)
timing belt cover and gasket. Tighten bolts to specification. See TORQUE SPECIFICATIONS .
8. Insert camshaft position sensor wire through hole in No. 3 (LH) timing belt cover. Connect camshaft
position sensor connector. Install harness wires to retaining clamps on timing belt covers.
9. Connect water by-pass hoses to by-pass pipe. Install water by-pass pipe to No. 3 (LH) timing belt cover.
Install No. 2 drive belt idler pulley and cover plate. See Fig. 10 . Install radiator and cooling fans
assembly.
10. Install drive belt. Install intake air duct and air cleaner assembly. Fill engine with coolant. Start engine
and check for coolant leaks. Bleed cooling system. See COOLING SYSTEM BLEEDING under
ADJUSTMENTS. Install engine "V" bank and side covers. Install engine under cover.

VALVE LIFTER

Removal

Remove camshafts. See CAMSHAFT . Note location of valve lifters and adjusting shims for installation
reference. Carefully remove valve lifters and adjusting shims from cylinder head. DO NOT allow adjusting
shims to drop into engine through cylinder head.

Inspection

Inspect components for damage. Measure valve lifter diameter and lifter bore diameter in cylinder head to
determine lifter clearance. Ensure oil clearance is within specification. Replace components if not within
specification. See VALVE LIFTERS table under ENGINE SPECIFICATIONS.

Installation

To install, reverse removal procedure. Ensure components are installed in original location. If camshaft,
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adjusting shims or valve lifters require replacement, check valve clearance. See VALVE CLEARANCE
ADJUSTMENT under ADJUSTMENTS.

CAMSHAFT

CAUTION: Release fuel pressure before disconnecting fuel line. See FUEL
PRESSURE RELEASE .

Removal

1. Disconnect negative battery cable. Drain cooling system. Remove engine "V" bank and side covers.
Remove intake air duct and air cleaner assembly. Remove radiator and cooling fans assembly. Remove
timing belt. See TIMING BELT . Remove camshaft position sensor.
2. Remove LH and RH timing belt rear plates. Remove valve covers. If necessary, remove camshaft semi-
circular plugs. Remove camshaft timing oil control valve from front camshaft bearing cap.
3. To avoid valve/piston interference, ensure timing mark on crankshaft pulley is aligned with center of
crankshaft pulley bolt and center of No. 2 timing belt idler pulley bolt. See Fig. 7 .
4. Using Variable Pin Wrench Set (09960-10010), and a shop rag to absorb oil, turn camshaft from left to
right 25 degrees, 2 to 3 times, to release oil from front bearing cap timing oil control valve installation
hole. Approximately 1.2 cu. in. (20 cc) of oil will be ejected.
5. Using a wrench on cast camshaft hex, turn LH exhaust camshaft to bring service bolt hole of sub-gear up.
Secure sub-gear on LH exhaust camshaft to main gear with a service bolt (6 x 1 x 20 mm). See Fig. 17 .
Rotate camshafts so dot marks on LH camshaft gears align with each other. See Fig. 2 .

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Fig. 17: Installing Service Bolt To Secure Sub-Gear To Main Gear (Right Camshaft Shown; Left
Camshaft Is Similar)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

6. Using a wrench on cast camshaft hex, turn RH exhaust camshaft to bring service bolt hole of sub-gear up.
Secure sub-gear on RH exhaust camshaft to main gear with a service bolt (6 x 1 x 20 mm). See Fig. 17 .
Rotate RH exhaust camshaft to position timing mark (one dot) at a 10-degree angle above timing mark
mating level on intake gear.

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Fig. 18: Camshaft Bearing Cap Bolt Removal Sequence

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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CAUTION: Since camshaft thrust clearance is so small, camshafts must be kept

level during removal to prevent damage to camshaft due to binding at
cylinder head thrust surface.

7. Evenly loosen camshaft bearing cap bolts in sequence, using several steps. See Fig. 18 . Remove 4 seal
washers, oil feed pipe, 9 bearing caps, oil control valve filter, and 2 camshafts, from each cylinder head.
Arrange bearing caps in order of removal.

CAUTION: DO NOT remove timing tube assembly bolts. See Fig. 19 . The 4 bolts
determine the backlash of gear inside timing tube. If any one of the 4
blots are removed, a NEW timing tube must be used.

Fig. 19: Identifying Timing Tube Bolts

Courtesy of TOYOTA MOTOR CORP.

8. To disassemble exhaust camshaft, mount cast hexagonal area of camshaft in soft-jaw vise. Using Variable
Pin Wrench Set (09960-10010), rotate sub-gear clockwise and remove service bolt. Remove snap ring,
wave washer, sub-gear and gear spring. To disassemble intake camshaft, mount cast hexagonal area of
camshaft in soft-jaw vise. Remove center plug and seal washer. Using a 10-mm hex wrench, remove bolt
from timing tube assembly. Remove timing tube and drive gear assembly. Using Variable Pin Wrench Set

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(09960-10010) and 5 mm hexagon (Allen) wrench, remove 4 Allen bolts, drive gear and oil seal from
timing tube.

Inspection

1. Inspect components for defects and damage. Check camshaft journal outside diameter, lobe height and
journal runout. Replace camshaft if not within specification. See CAMSHAFT table under ENGINE
SPECIFICATIONS.
2. To check journal oil clearance, install camshafts in cylinder head one at a time, without lifters. Using
Plastigage, check camshaft oil clearance. Tighten camshaft bearing cap bolts to specification, in sequence.
See TORQUE SPECIFICATIONS . See Fig. 23 . DO NOT turn camshaft.
3. Remove camshaft, and check thickness of Plastigage to determine oil clearance. Replace camshaft and/or
cylinder head and bearing caps if oil clearance is not within specification. See CAMSHAFT table under
ENGINE SPECIFICATIONS.
4. Check camshaft end play with camshaft bearing cap bolts tightened to specification. Replace camshaft
and/or cylinder head and bearing caps if end play is not within specification. See CAMSHAFT table
under ENGINE SPECIFICATIONS.

NOTE: Camshaft end play thrust is determined by front bearing cap installation.

5. Install both camshafts in cylinder head without sub-gear installed on exhaust camshaft. Tighten camshaft
bearing cap bolts to specification, in sequence. See Fig. 23 . See TORQUE SPECIFICATIONS . Check
gear backlash between camshaft gears.
6. Replace intake camshaft drive gear and exhaust camshaft if gear backlash exceeds specification. See
CAMSHAFT table under ENGINE SPECIFICATIONS. Measure distance (gap) between ends of gear
spring. Replace gear spring if distance is not 0.712-0.740" (18.0-18.8 mm).

Installation

1. Ensure timing mark on crankshaft pulley is aligned with center of crankshaft pulley bolt and center of No.
2 timing belt idler pulley bolt. See Fig. 7 . To install camshafts in RH cylinder head, apply grease to
thrust surfaces of intake and exhaust camshafts. Install intake and exhaust camshafts in RH cylinder head
so timing marks on sprockets align with each other. See Fig. 2 . Rotate camshaft and position timing
mark (one dot) of camshaft main gear at a 10-degree angle above mating position of timing marks on both
camshaft gears.
2. Install camshaft housing plug to cylinder head (if removed). Install camshaft oil control valve filter to RH
cylinder head. Apply silicone sealant to front bearing cap as shown. See Fig. 20 . Install front bearing
cap. Install remaining camshaft bearing caps in their proper order from front to rear, with arrows on caps
pointing forward. See Fig. 21 . Push in front camshaft oil seal.

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Fig. 20: Applying Sealant To Front Camshaft Bearing Cap

Courtesy of TOYOTA MOTOR CORP.

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Fig. 21: Identifying Camshaft Bearing Caps

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. Identify camshaft bearing cap bolts. See CAMSHAFT BEARING CAP BOLT SPECIFICATIONS .
Install NEW seal washers to bearing cap bolts "A" and "B". Coat threads and under heads of bearing cap
bolts "D" and "E". See Fig. 22 . DO NOT apply engine oil under heads of bearing cap bolts "A", "B" and
"C". Install oil feed pipe. Install bearing cap bolts in their correct location. See Fig. 22 . Tighten bearing
cap bolts to specification in several steps, in the proper sequence. See Fig. 23 . See TORQUE
SPECIFICATIONS .

CAMSHAFT BEARING CAP BOLTS SPECIFICATIONS

Bolt (1) Length - In. (mm)
"A" 3.7007 (94.000)
"B" 2.8346 (72.000)
"C 0.9842 (24.990)
"D" 2.0472 (51.999)
"E" 1.4960 (37.998)
(1) See Fig. 22 .

Fig. 22: Identifying Camshaft Bearing Cap Bolts

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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Fig. 23: Camshaft Bearing Cap Bolt Tightening Sequence

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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4. To install camshafts in LH cylinder head, apply grease to thrust surfaces of exhaust and intake camshafts.
Install camshafts in LH cylinder head. Rotate camshafts and align timing marks (one dot) on each gear
with each other. See Fig. 2 . Install camshaft housing plug to cylinder head (if removed). Install camshaft
oil control valve filter to LH cylinder head. Apply silicone sealant to front bearing cap as shown. See Fig.
20 . Install front bearing caps. Install remaining bearing caps in their proper location from front to rear,
with arrow mark facing forward. See Fig. 21 . Push in front camshaft oil seal.
5. Identify camshaft bearing cap bolts. See CAMSHAFT BEARING CAP BOLT SPECIFICATIONS
table. Install NEW seal washers to bearing cap bolts "A" and "B". Coat threads and under heads of
bearing cap bolts "D" and "E". See Fig. 22 . DO NOT apply engine oil under heads of bearing cap bolts
"A", "B" and "C". Install oil feed pipe. Install bearing cap bolts in their correct location. See Fig. 22 .
Tighten bearing cap bolts to specification in several steps, in the proper sequence. See Fig. 23 . See
TORQUE SPECIFICATIONS .
6. Remove service bolt from exhaust camshaft gears. To install remaining components, reverse removal
procedure. Check valve clearance. See VALVE CLEARANCE ADJUSTMENT under
ADJUSTMENTS. Fill and bleed cooling system. See COOLING SYSTEM BLEEDING .

CRANKSHAFT REAR OIL SEAL

Removal

Remove transmission, drive plate, and front and rear drive plate spacers. Using a knife, cut seal lip from oil seal.
Carefully pry crankshaft rear oil seal from rear seal housing. DO NOT damage sealing surface.

Installation

1. Ensure all sealing surfaces are clean. Apply grease to lip of NEW crankshaft rear oil seal. Using a
hammer and Oil Seal Installer (09223-56010), install NEW rear crankshaft oil seal in seal housing until
seal is even with seal housing surface.
2. Apply Three Bond 1234 to threads of drive plate bolts. Install drive plate with front and rear spacers on
crankshaft and tighten bolts to specification in 2 steps. See TORQUE SPECIFICATIONS . Install
transmission to engine. Apply Three Bond 1234 to threads of torque converter bolts and install the Black
colored bolt first. Install flywheel access cover. To install remaining components, reverse removal
procedure.

WATER PUMP

Removal

1. Drain cooling system. Remove timing belt. See TIMING BELT . Remove No. 2 idler pulley. Remove
throttle body.
2. Remove water intake housing assembly from water pump. Remove "O" ring from water by-pass pipe on
intake housing. Remove by-pass hose from water intake housing. Remove 5 bolts and 2 nuts. Remove
water pump and gasket.

Installation

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1. Ensure all sealing surfaces are clean. Install NEW "O" ring on water by-pass pipe on intake housing. Coat
"O" ring with soapy water and install water by-pass pipe to water pump. Using a NEW gasket, install
water pump. Install retaining bolts and nuts, and tighten to specification. See TORQUE
SPECIFICATIONS .
2. Apply a continuous bead of silicone sealant to groove in mounting surface of water intake housing. Install
NEW "O" ring on water intake housing, and lubricate "O" ring with soapy water.
3. Push water intake housing end into water pump opening. Connect by-pass hose to water intake housing.
Install water intake housing assembly. Install the 2 water intake housing bolts in their correct location.
See Fig. 24 . Tighten bolts to specification. See TORQUE SPECIFICATIONS .

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Fig. 24: Identifying Water Inlet Housing Bolt Lengths

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4. To install remaining components, reverse removal procedure. Fill and bleed cooling system. See
COOLING SYSTEM BLEEDING .

OIL PAN

NOTE: Manufacturer lists procedure with engine removed.

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Removal

1. Remove engine. See ENGINE . Remove No. 2 oil pan retaining bolts and nuts. See Fig. 25 .
2. Using Seal Cutter (09032-00100), separate No. 2 from No. 1 oil pan. Carefully tap seal cutter around No.
2 oil pan to loosen seal. DO NOT damage sealing surfaces. Remove No. 2 oil pan.
3. Remove bolts and nuts, and remove baffle plate. See Fig. 25 . Note location of No. 1 oil pan nuts and
bolts. Remove No. 1 oil pan nuts and bolts. Using a screwdriver, pry evenly between oil pan and cylinder
block, and remove No. 1 oil pan.

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Fig. 25: Exploded View Of Oil Pan & Components (GS430 Shown; LS430 Is Similar)
Courtesy of COURTESY OF TOYOTA MOTOR SALES, U.S.A., INC.

Installation

1. Ensure sealing surfaces are clean and dry. Apply a continuous bead of silicone sealant onto sealing
surface of No. 1 oil pan, inside of bolt holes. Install No. 1 oil pan. Install No. 1 oil pan nuts and bolts in
their correct location. See Fig. 26 or Fig. 27 . See LS430 NO. 1 OIL PAN BOLT SPECIFICATIONS
table. Ensure clearance between rear ends of oil pan and cylinder block is .008" (0.2 mm) or less to
prevent oil pan from being stretched out of shape. See Fig. 27 . Tighten No. 1 oil pan nuts and bolts in
several steps to specification. See TORQUE SPECIFICATIONS .

Fig. 26: Identifying Oil Pan Bolt Length & Location (GS430)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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Fig. 27: Identifying Oil Pan Bolt Length & Location (LS430)
Courtesy of TOYOTA MOTOR CORP.

LS430 NO. 1 OIL PAN BOLT SPECIFICATIONS

Bolt (1) Head Size mm Length - In. (mm)
"A" 10 0.79 (20)
"B" 10 1.38 (35)
"C 12 2.36 (60)
"D" 12 0.98 (25)
(1) See Fig. 27 .

2. Install baffle plate. On GS430 models, install baffle plate nuts and bolts in their correct location. See Fig.
28 . On LS430 models, install baffle plate nuts and bolts. On all models, tighten nuts and bolts to
specification. See TORQUE SPECIFICATIONS .

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Fig. 28: Identifying Baffle Plate Bolt Length & Location (GS430)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. Apply a continuous bead of silicone sealant onto sealing surface of No. 2 oil pan, inside of bolt holes.
Install No. 2 oil pan nuts and bolts, and tighten to specification. See TORQUE SPECIFICATIONS .

OVERHAUL
CYLINDER HEAD

Cylinder Head

1. Inspect cylinder head for warpage at cylinder block mounting surface and both manifold mounting
surfaces. Replace cylinder head if warpage exceeds specification. See CYLINDER HEAD table under

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ENGINE SPECIFICATIONS.
2. To check camshaft oil clearance, using Plastigage, install camshaft in cylinder head using proper
procedure. See CAMSHAFT under REMOVAL & INSTALLATION.
3. Replace camshaft and/or cylinder head and bearing caps if oil clearance is not within specification. See
CAMSHAFT table under ENGINE SPECIFICATIONS.
4. Using a dial indicator, check camshaft end play (thrust clearance) with camshaft bearing cap bolts
tightened to specification. Replace camshaft and/or cylinder head and bearing caps if end play is not
within specification. See CAMSHAFT table under ENGINE SPECIFICATIONS.
5. Ensure valve lifter oil clearance is within specification. See VALVE LIFTERS table under ENGINE
SPECIFICATIONS.
6. If replacing cylinder head, apply a coat of Three Bond (1234) .59" (15 mm) wide around sealing end of
spark plug tube. Using a wooden block and hammer, tap spark plug tubes into cylinder head until distance
from top of spark plug tube protrudes 1.906-1.953" (48.41-49.61 mm). above camshaft bearing cap
installation surface of cylinder head.

Valve Springs

Ensure valve spring free length, tension pressure and out-of-square are within specification. See VALVES &
VALVE SPRINGS table under ENGINE SPECIFICATIONS.

Valve Stem Oil Seals

Valve stem oil seals are color coded on one end for identification. Exhaust valve stem oil seals are Gray and
intake valve stem oil seals are Brown. Lubricate valve stem oil seal with engine oil before installation. Use
Valve Stem Oil Seal Installer (09201-41020) to install valve stem oil seal.

Valve Guides

1. Using a valve guide bushing brush and cleaning solvent, clean inside diameter of all valve guides. Ensure
valve guide inside diameter is within specification. See CYLINDER HEAD table under ENGINE
SPECIFICATIONS. Replace valve guide if inside diameter exceeds specification.
2. To replace valve guide, submerge cylinder head in a suitable container filled with water, and heat to 176-
212°F (80-100°C). When cylinder head has reached specified temperature, remove and place on bench.
Using a hammer, Valve Guide Remover/Installer (09201-1000) and Handle (09951-07100), drive out
valve guide from camshaft (upper) side of cylinder head.
3. Using a caliper gauge, measure inside diameter of cylinder head valve guide bushing bore. If inside
diameter is .4049-.4057" (10.285-10.306 mm), use standard valve guide.
4. If inside diameter of bore exceeds .4057" (10.306 mm), machine valve guide bushing bore to .4069-
.4077" (10.335-10.356 mm) for oversize valve guide. Replace cylinder head if inside diameter of bore
exceeds .4077" (10.356 mm).

CAUTION: Exhaust valve guide is 1.594" (40.5 mm) long and intake valve guide
is 1.358" (34.5 mm) long. Ensure proper length valve guide is
installed in the correct location.

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5. To install valve guide, submerge cylinder head in a suitable container filled with water and heat to 176-
212°F (80-100°C). When cylinder head has reached specified temperature, remove and place on bench.
Using a hammer, Valve Guide Remover/Installer (09201-1000) and Handle (09951-07100), drive valve
guide in from camshaft (upper) side of cylinder head, until valve guide protrudes .362-.386" (9.2-9.8 mm)
for intake or .323-.346" (8.2-8.8 mm) for exhaust, above spring seat.
6. Using a sharp 5.5-mm reamer, ream valve guide to obtain standard valve stem-to-guide oil clearance. See
CYLINDER HEAD table under ENGINE SPECIFICATIONS.

Valves

Ensure minimum overall refinish length, stem diameter and valve head margin are within specification. See
VALVES & VALVE SPRINGS table under ENGINE SPECIFICATIONS.

Valve Seat

Ensure valve seat angle and seat width are within specification. See CYLINDER HEAD table under ENGINE
SPECIFICATIONS. Valve seat replacement information is not available from manufacturer.

Valve Seat Correction Angles

If valve seat is too high, use 30-degree and 45-degree stones to lower valve seat contact area. If valve seat is too
low, use 60-degree and 45-degree stones to raise valve seat contact area.

VALVE TRAIN

Valve Lifters

Ensure valve lifter diameter, bore diameter and oil clearance are within specification. See VALVE LIFTERS
table under ENGINE SPECIFICATIONS.

CYLINDER BLOCK ASSEMBLY

Piston & Rod Assembly

1. Ensure connecting rod and connecting rod cap are marked with matching cylinder number for reassembly
reference before removal. Using a ridge reamer, remove ring ridge in cylinder bores before removing
pistons (if necessary). Using a dial indicator, check connecting rod thrust (side) clearance before removal.
If thrust clearance exceeds specification, replace connecting rod assembly and/or crankshaft. See
CONNECTING RODS table under ENGINE SPECIFICATIONS.

NOTE: Top of right piston contains 2 cavities for front mark, and left piston
contains one cavity for front mark. Pistons are also marked "R" for right
side and "L" for left side on piston boss. Connecting rod caps have an
outside mark that should face toward crankshaft on installation. See Fig.
29 . Piston must be installed with front cavity marks properly positioned in
relation to outside mark on connecting rod cap. Reference to right and left
indicates sides as viewed from rear of engine (drive plate end).
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Fig. 29: Identifying Piston & Connecting Rod Cap Front Marks
Courtesy of TOYOTA MOTOR CORP.

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2. Remove connecting rod cap. Using Plastigage, check rod bearing oil clearance, with rod cap bolts
tightened to specification. Remove rod cap and Plastigage and measure thickness of Plastigage to
determine oil clearance. If clearance is not within specification, replace rod bearings and/or crankshaft.
Remove piston and connecting rod assembly from cylinder block. Keep connecting rod, bearings and rod
cap together.
3. Using a ring expander, remove the 2 top compression rings, remove oil rings by hand. Using a small
screwdriver, remove the 2 piston pin retaining rings from piston. Submerge piston and rod assembly in
water and gradually heat to 140°F (60°C). Using a plastic mallet and brass bar, lightly tap piston pin out
and remove connecting rod from piston.
4. Ensure piston pin diameter is within specification. See PISTONS, PINS & RINGS table under ENGINE
SPECIFICATIONS.
5. Ensure connecting rod piston pin bushing bore diameter, crankpin bore diameter, and rod bend and twist
are within specification. See CONNECTING RODS table under ENGINE SPECIFICATIONS.
6. Using a press and appropriate driver, bushing in connecting rod can be replaced if bore diameter is not
within specification. Ensure bushing oil hole aligns with connecting rod oil hole during installation. Hone
bushing to obtain correct piston pin-to-rod clearance.
7. To reassemble, install NEW piston pin retaining ring in piston. Install piston on connecting rod so front
mark on piston is properly positioned with outside mark on connecting rod cap. See Fig. 29 . Heat piston
to 140°F (60°C) in water. Coat piston pin with engine oil. Install piston pin through piston and connecting
rod bushing. Install remaining NEW piston pin retaining ring in piston.

Fitting Pistons

1. Different piston and cylinder bore sizes are used. Piston diameter is determined by size mark ("1", "2" or
"3") stamped on top of piston. Cylinder bore diameter is determined by size mark ("1", "2" or "3")
stamped on cylinder block deck surface near each respective cylinder. See Fig. 30 .

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Fig. 30: Locating Cylinder Bore Size Marks

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. To determine piston-to-cylinder clearance, measure piston diameter and cylinder bore diameter. Measure
piston skirt diameter 1.04" (26. mm) from top of piston, at 90-degree angle to piston pin. Ensure piston
diameter is within specification. See PISTONS, PINS & RINGS table under ENGINE
SPECIFICATIONS.
3. Using cylinder gauge, measure cylinder bore at positions "A", "B", and "C" in axial thrust directions. See
Fig. 31 . Ensure cylinder bore diameter, taper and out-of-round measurements are within specification.
See CYLINDER BLOCK table under ENGINE SPECIFICATIONS. Replace cylinder block if cylinder
bore diameter exceeds specification.

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Fig. 31: Measuring Cylinder Bore Diameter

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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4. Determine piston clearance. If clearance is not within specification, replace piston or cylinder block. See
PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS.

Piston Rings

Ensure piston ring end gap and side clearance in ring groove are within specification. See PISTONS, PINS &
RINGS table under ENGINE SPECIFICATIONS. Install piston rings with identification mark on ring facing
toward top of piston. Stagger ring gaps on piston before installation. See Fig. 32 .

NOTE: Top ring is marked 1R and second ring is marked with 2R identification marks.

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Fig. 32: Positioning Piston Rings

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Rod Bearings

1. Ensure connecting rod cap is marked with proper cylinder number before disassembly. Connecting rod
and piston assembly must be installed with front mark on piston facing toward front of engine (timing
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belt end) and outside mark on rod cap facing toward crankshaft.
2. Connecting rod cap, rod bearing and crankshaft are stamped with size marks. There are 6 sizes of
standard bearings marked 2, 3, 4, 5, 6 and 7. If replacing rod bearing, ensure size mark on NEW rod
bearing is the same as size mark on original rod bearing. See Fig. 33 . If size mark on original rod bearing
cannot be determined, add size mark on crankshaft and size mark on connecting rod cap together, to
determine size of NEW rod bearing to be used. For example, if size mark on crankshaft is "1" and size
mark on connecting rod cap is "3", use rod bearing with size mark "4".

Fig. 33: Identifying Connecting Rod Bearing, Rod Cap & Crankshaft Size Marks
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. Rod bearing thickness is also determined by size mark. See ROD BEARING SPECIFICATIONS table.

ROD BEARING SPECIFICATIONS

Size Mark Bearing Thickness - In. (mm)
"2" .0584-.0585 (1.484-1.487)
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"3" .0585-.0587 (1.487-1.490)

"4" .0587-.0588 (1.490-1.493)
"5" .0588-.0589 (1.493-1.496)
"6" .0589-.0590 (1.496-1.499)
"7" .0590-.0591 (1.499-1.502)

4. Ensure connecting rod and piston assembly is installed with front mark on piston pointing toward front of
engine (timing belt end) and outside mark on rod cap facing toward crankshaft. On right pistons, outside
mark on connecting rod cap must face rear end of engine. On left pistons, outside mark on connecting rod
cap must face front of engine. Using a ring compressor, install piston and rod assembly into cylinder
block.
5. Coat threads of connecting rod bolt and under bolt heads with engine oil before installation. Install rod
cap bolts and alternately tighten to specification, in 2 steps. See TORQUE SPECIFICATIONS .
6. Use plastigage to check rod bearing clearance. Ensure rod bearing oil clearance and connecting rod side
clearance are within specification. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS
and CONNECTING RODS tables under ENGINE SPECIFICATIONS.

Crankshaft & Main Bearings

1. Remove 7 bolts and remove rear oil seal retainer and "O" ring. Using a dial indicator, check crankshaft
end play before removing crankshaft from cylinder block. Replace thrust bearings if end play is not
within specification. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under
ENGINE SPECIFICATIONS. Thrust bearings are on No. 3 journal.
2. Main bearing caps are numbered 1-5 for location, with No. 1 at timing belt (front) end and No. 5 at drive
plate (rear) end. Note that arrows on main bearing caps point toward timing belt end of engine. Remove
10 side main bearing cap bolts located on sides of cylinder block.
3. Evenly loosen the 20 main bearing cap bolts in sequence, using several steps. See Fig. 34 . Remove main
bearing cap bolts and main bearing caps. Lift crankshaft from cylinder block. Remove thrust bearings
from journal No. 3.

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Fig. 34: Main Bearing Cap Bolt Removal & Installation Sequence
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Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4. Reinstall main bearing caps with bearings to cylinder block, without crankshaft, and tighten bolts to
specification. Using cylinder bore gauge, measure inside diameter of main bearings. Main bearing inside
diameter should be 2.6372-2.6378" (66.985-67.000 mm). Using an outside micrometer, measure outside
diameter of crankshaft main bearing journals. Subtract main bearing journal diameter from main bearing
inside diameter to determine oil clearance. If clearance exceeds specification, replace bearings and/or
crankshaft.
5. If replacing bearing, ensure size mark on NEW bearing is the same as size mark on original bearing. Main
bearing size mark ("1", "2", "3", "4" or "5") is located on back of main bearing. See Fig. 35 . If size mark
on original bearing cannot be determined, add size mark on crankshaft to size mark on cylinder block,
and refer to charts in figure to determine size of NEW bearing to be used. See Fig. 36 .

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Fig. 35: Identifying Crankshaft, Cylinder Block & Main Bearing Size Marks
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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Fig. 36: Main Bearing Application Selection Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

6. Cylinder block main bearing bore inside diameter is identified by main bearing bore size mark stamped
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on cylinder block. See Fig. 35 . Crankshaft main bearing journal diameter is determined by size mark
located on crankshaft counterweight.
7. Main bearing thickness is also determined by size mark. See MAIN BEARING SPECIFICATIONS
table.

MAIN BEARING SPECIFICATIONS

Size
Mark Bearing Thickness - In. (mm)
No. 1 & No. 5 Bearings
"3" .0981-.0982 (2.492-2.494)
"4" .0982-.0983 (2.494-2.497)
"5" .0983-.0985 (2.497-2.502)
"6" .0985-.0986 (2.502-2.504)
"7" .0986-.0987 (2.504-2.507)
No. 2, 3 & 4 Bearings
"1" .0979-.0980 (2.487-2.489)
"2" .0980-.0981 (2.489-2.492)
"3" .0981-.0982 (2.492-2.494)
"4" .0982-.0983 (2.494-2.497)
"5" .0983-.0985 (2.497-2.502)

8. Ensure journal diameter, taper and out-of-round are within specification. Replace crankshaft if not within
specification. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under ENGINE
SPECIFICATIONS.
9. Main bearings come in widths of .768" (19.5 mm) and .886" (22.5 mm). See Fig. 37 . Install the 2 wide
main bearings in No. 1 (timing belt end) and No. 5 (drive plate end) positions. Install the remaining
narrow main bearings in all other locations. Ensure upper main bearings installed in cylinder block
contain oil holes and oil grooves. Lower main bearings installed in main bearing caps, do not have oil
holes or grooves.

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Fig. 37: Identifying Main Bearing Widths

Courtesy of TOYOTA MOTOR CORP.

10. Use Plastigage to check main bearing oil clearance. Coat threads and under head of main bearing bolts
with engine oil. Install main bearing caps and tighten bolts to specification. Remove main bearing caps
and measure thickness of Plastigage to determine clearance. If clearance is not within specification,
replace bearings with appropriate size to obtain correct clearance.
11. Install thrust washers on No. 3 main bearing in cylinder block and main bearing cap, with grooved sides
facing outward, toward crankshaft. Install crankshaft and main bearing caps. Main bearing caps must be
installed with arrow on top of cap pointing toward timing belt end of engine. Ensure main bearing caps
are installed in numerical order, with No. 1 at timing belt end of engine and No. 5 at drive plate end.
12. Install and tighten main bearing cap bolts to specification in sequence, using 2 steps. See TORQUE
SPECIFICATIONS .
13. Ensure crankshaft end play is within specification. See CRANKSHAFT, MAIN & CONNECTING
ROD BEARINGS table under ENGINE SPECIFICATIONS. Replace thrust bearing if end play is not
within specification.
14. Install NEW seal washers on the 10 main bearing cap side bolts located on sides of cylinder block. Install
bolts and tighten to specification. See TORQUE SPECIFICATIONS .

Thrust Bearing

Install thrust bearing on No. 3 main bearing journal with grooves facing outward, toward crankshaft. Thrust
bearing must be replaced if crankshaft end play is not within specification. See CRANKSHAFT, MAIN &
CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS.

Cylinder Block

1. Inspect cylinder block deck surface warpage. Replace cylinder block if deck warpage exceeds
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specification. See CYLINDER BLOCK table under ENGINE SPECIFICATIONS.

2. Measure cylinder bore diameter at .39" (9.9 mm) from top and bottom of cylinder bore and at middle of
cylinder bore. Different cylinder bore sizes are used. Cylinder bore diameter is determined by size mark
("1", "2" or "3") stamped on cylinder block deck surface. See Fig. 30 .
3. Ensure cylinder bore diameter is within specification. See CYLINDER BLOCK table under ENGINE
SPECIFICATIONS. Replace cylinder block if cylinder bore diameter exceeds specification.

NOTE: Main bearing bore inside diameter is determined by main bearing bore size
mark stamped on cylinder block. See Fig. 33 .

ENGINE OILING
ENGINE LUBRICATING SYSTEM

Crankcase Capacity

On GS430 models, crankcase capacity with oil filter is 5.7 qts. (5.4L) or 5.2 qts. (5.2L) without oil filter. On
LS430 models, crankcase capacity with oil filter is 4.8 qts. (4.5L) or 4.4 qts. (4.2L) without oil filter.

Oil Pressure

With engine at normal operating temperature, oil pressure should be at least 4.2 psi (0.3 kg/cm2 ) at idle, and
43-85 psi (3.0-6.0 kg/cm2 ) at 3000 RPM.

OIL PUMP

CAUTION: On LS430 models with electronic modulated air suspension, ensure

ignition switch is turned to OFF position before raising vehicle.

Removal & Disassembly

1. Manufacturer lists procedure with engine removed. Remove engine. See ENGINE under REMOVAL &
INSTALLATION. Remove timing belt, idler pulleys and crankshaft sprocket. See TIMING BELT under
REMOVAL & INSTALLATION.
2. Remove oil pan. See OIL PAN under REMOVAL & INSTALLATION. Remove 2 nuts and remove oil
strainer and gasket. Remove 8 attaching bolts, and remove oil pump. Remove "O" ring from cylinder
block.
3. To disassemble, remove plug, gasket, compression spring and relief valve. Remove bolts, oil pump cover
and rotors. See Fig. 38 .

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Fig. 38: Exploded View Of Oil Pump

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Inspection

1. Inspect components for damage. Coat relief valve with engine oil. Ensure relief valve slides freely in
valve bore. Install drive and driven rotors in oil pump body, with identification mark (triangle mark)
facing toward oil pump cover.
2. Using a feeler gauge, measure driven rotor-to-oil pump body clearance. Replace rotor assembly or oil
pump assembly if clearance exceeds specification. See OIL PUMP SPECIFICATIONS table.
3. Measure rotor tip clearance between tips of rotors. Replace rotor assembly if clearance exceeds
specification. See OIL PUMP SPECIFICATIONS table.
4. Place straightedge across oil pump body, above both rotors. Using a feeler gauge, measure rotor end
clearance (side clearance) between straightedge and surface of each rotor. Replace rotor assembly or oil
pump assembly if clearance exceeds specification. See OIL PUMP SPECIFICATIONS table.

OIL PUMP SPECIFICATIONS

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Application In. (mm)

Driven Rotor-To-Oil Pump Body Clearance
Standard .0098-.0128 (.249-.325)
Wear Limit .0128 (.325)
Rotor Side Clearance
Standard .0012-.0035 (.030-.090)
Wear Limit .0035 (.090)
Rotor Tip Clearance
Standard .0024-.0071 (.060-.180)
Wear Limit .0071 (.180)

Reassembly

1. To reassemble, reverse disassembly procedure. Ensure both rotors are installed in oil pump body with
identification marks (triangle mark) facing toward oil pump cover. Tighten oil pump cover bolts to
specification. See TORQUE SPECIFICATIONS .
2. If installing crankshaft front seal, use hammer and Seal Installer (09316-60010). Install NEW oil seal
until seal surface is even with oil pump body. Apply grease to sealing lip of seal.

Installation

1. Ensure sealing surfaces are clean. Install NEW "O" ring on cylinder block. Apply a continuous bead of
silicone sealant on oil pump body sealing surface, inside of bolt holes.
2. Install oil pump. Ensure teeth on drive rotor engage with teeth on crankshaft. Install bolts. DO NOT reuse
stud bolt. Ensure proper bolts are installed in specified areas. See Fig. 39 . Tighten all bolts to
specification. See TORQUE SPECIFICATIONS .
3. To install remaining components, reverse removal procedure. Ensure proper oil pan installation procedure
is used. See OIL PAN under REMOVAL & INSTALLATION. Fill engine with oil.

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Fig. 39: Identifying Oil Pump Bolt Location

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
Application Ft. Lbs. (N.m)
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A/C Compressor-To-Block 36 (49)

A/C Compressor-To-Oil Filter Bracket 21 (28)
Accelerator Cable Bracket Bolt/Nut 13 (18)
Camshaft Bearing Cap Bolt
All Except Bolts 21 & 22 12 (16)
Bolts 21 & 22 (1)

Camshaft Timing Tube 58 (79)

Catalytic Converter-To-Exhaust Manifold Nut 46 (62)
Catalytic Converter-To-Exhaust Pipe Bolt 32 (43)
Center Exhaust Pipe Nut/Bolt 32 (43)
Connecting Rod Cap Bolt
Step 1 18 (24)
Step 2 Additional 90
Degrees
Crankshaft Pulley Bolt 181 (245)
Cylinder Head Bolt (2)
Step 1 44 (59)
Step 2 Additional 90
Degrees
Delivery Pipe Nut 13 (18)
Drive Belt Idler Pulley Bolt/Nut
12 mm 12 (16)
14 mm 24 (33)
Drive Belt Tensioner Bolt/Nut 11 (15)
Drive Plate-To-Crankshaft Bolt
Step 1 36 (49)
Step 2 Additional 90 Degees
Drive Shaft Center Bearing Bolt 27 (37)
Drive Shaft Flange Bolt 58 (79)
Engine Coolant Drain Union Plug 36 (49)
Engine Hanger Bolt 27 (37)
Engine Mount-To-Cylinder Block 27 (37)
Exhaust Manifold Nut 32 (43)
Front Exhaust Pipe Support Bracket 32 (43)
Front Suspension Crossmember 43 (58)
Fuel Hose 24 (33)
Generator Bolt/Nut 29 (39)
Heated Oxygen Sensor 32 (43)
Knock Sensor Bolt/Nut 33 (45)
Lower Intake Manifold Bolt/Nut 13 (18)

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Main Bearing Cap Bolt (3)

Step 1 20 (27)
Step 2 Additional 90
Degrees
Main Bearing Side Bolts 36 (49)
No. 1 & 2 Timing Belt Idler Pulley Bolt 25 (34)
No. 2 Timing Belt Cover Bolt 12 (16)
Oil Filter Bracket Bolt/Nut 13 (18)
Oil Pan
No. 1 Oil Pan Bolt/Nut
10-mm Head (1)

12-mm Head 21 (28)

No. 2 Oil Pan Bolt/Nut (1)

Oil Pump-To-Cylinder Block Bolt

12-mm Head 11 (15)
14-mm Head 22 (30)
Power Steering Pump
Bolt 29 (39)
Nut 32 (43)
Rear Engine Mounting Member-to-Body 19 (26)
Spark Plug 13 (18)
Throttle Body Bolt/Nut 13 (18)
Timing Belt Tensioner Bolt 19 (26)
Torque Converter-To-Drive Plate Bolt 30 (41)
Transmission Oil Cooler Pipe (For Union Nut) 25 (34)
VSV For EVAP Bolt/Nut 13 (18)
Water By-Pass Pipe Bolt 13 (18)
Water Manifold Nut/Bolt 13 (18)
Water Pump Bolt/Nut 13 (18)
Water Seal Plate Bolt 10 (14)
INCH Lbs. (N.m)
Camshaft Drive Gear Bolt/Nut 66 (7.5)
Camshaft Sprocket Bolt 66 (7.5)
Center Floor Crossmember Brace Bolt/Nut 115 (13)
Crankshaft Position Sensor Bolt 66 (7.5)
No. 3 Timing Belt Cover Bolt 66 (7.5)
Oil Level Sensor Bolt 48 (5)
Oil Baffle Plate Bolt/Nut 66 (7.5)
Rear Oil Seal Retainer Bolt 71 (8)
Timing Belt Rear Plate Bolt 66 (7.5)

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V-Bank Cover Bracket Bolt 66 (7.5)

Valve Cover Bolt 53 (6)
(1) Tighten to 66 INCH lbs. (7.5 N.m).

(2) Tighten bolts to specification in sequence. See Fig. 9 .

(3) Tighten main bearing cap bolts in sequence. See Fig. 34 .

ENGINE SPECIFICATIONS
GENERAL SPECIFICATIONS
Application Specification
Displacement 262 Cu. In. (4.3L)
Bore (1)

Stroke (1)

Compression Ratio (1)

Fuel System SFI

(1) Information not available from manufacturer.

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS

Application In. (mm)
Crankshaft
End Play
Standard .0008-.0087 (.020-.220)
Wear Limit .0118 (.300)
Runout .0031 (0.08)
Main Bearings
Journal Diameter (1)
Size Mark "00" 2.63779 (67.000)
Size Mark "01" 2.63775 (66.999)
Size Mark "02" 2.63771 (66.998)
Size Mark "03" 2.63767 (66.997)
Size Mark "04" 2.63763 (66.996)
Size Mark "05" 2.63759 (66.995)
Size Mark "06" 2.63755 (66.994)
Size Mark "07" 2.63751 (66.993)
Size Mark "08" 2.63747 (66.992)
Size Mark "09" 2.63743 (66.991)
Size Mark "10" 2.63739 (66.990)
Size Mark "11" 2.63735 (66.989)
Size Mark "12" 2.63731 (66.988)
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Journal Out-Of-Round .0008 (.020)

Journal Taper .0008 (.020)
Oil Clearance
No. 1 & 5
Standard .0007-.0013 (.018-.033)
Wear Limit .0017 (.043)
All Others
Standard .0011-.0018 (.028-.046)
Wear Limit .0022 (.056)
Connecting Rod Bearings
Journal Diameter (2)
Size Mark "1" 2.0470-2.0472 (51.994-52.999)
Size Mark "2" 2.0468-2.0470 (51.989-51.994)
Size Mark "3" 2.0465-2.0468 (51.981-51.989)
Journal Out-Of-Round .0008 (.020)
Journal Taper .0008 (.020)
Oil Clearance
Standard .0008-.0019 (.020-.048)
Wear Limit .0026 (.066)
(1) Main bearing journal diameter is identified by size mark on crankshaft. See Fig. 35 .

(2) Connecting rod bearing journal diameter is identified by size mark on crankshaft. See Fig. 33 .

CONNECTING RODS
Application In. (mm)
Bore Diameter
Pin Bushing Bore .8660-.8664 (21.996-22.007)
Crankpin Bore (1)
Size Mark "1" 2.1654-2.1656 (55.001-55.006)
Size Mark "2" 2.1656-2.1658 (55.006-55.011)
Size Mark "3" 2.1658-2.1661 (55.011-55.019)
Size Mark "4" 2.1661-2.1663 (55.019-55.024)
Maximum Bend .0020 Per 3.94 (.050 Per 100.0)
Maximum Twist .0059 Per 3.94 (.150 Per 100.0)
Side Play
Standard .0063-.0138 (.160-.350)
Wear Limit .0138 (.350)
(1) Crankpin diameter is identified by size mark on connecting rod cap. See Fig. 33 .

PISTONS, PINS & RINGS

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Application In. (mm)

Pistons
Clearance
Standard .0033-.0041 (.084-.104)
Wear Limit .0049 (.124)
Diameter
Size Mark "1" 3.5791-3.5795 (90.909-90.919)
Size Mark "2" 3.5795-3.5798 (90.919-90.927)
Size Mark "3" 3.5798-3.5802 (90.927-90.937)
Pins
Diameter .8660-.8664 (21.996-22.007)
Piston Fit (1)

Rod Fit
Standard .0002-.0004 (.005-.010)
Wear Limit .0020 (.050)
Oil Clearance
Standard .0002-.0004 (.005-.010)
Wear Limit .0020 (.050)
Rings
No. 1
End Gap
Standard .0118-.0157 (.299-.399)
Maximum .0413 (1.050)
Side Clearance .0012-.0028 (.030-.079)
No. 2
End Gap
Standard .0157-.0197 (.399-.500)
Maximum .0472 (1.199)
Side Clearance .0008-.0024 (.020-.061)
No. 3 (Oil)
End Gap
Standard .0059-.0157 (.150-.399)
Wear Limit .0433 (1.100)
(1) With piston heated to 140°F (60°C), piston pin should slide into piston with thumb pressure.

CYLINDER BLOCK
Application In. (mm)
Cylinder Bore Standard Diameter (1)
Size Mark "1" 3.5827-3.5830 (91.000-91.008)
Size Mark "2" 3.5830-3.5835 (91.008-91.020)
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Size Mark "3" 3.5835-3.5838 (91.020-91.029)

Main Bearing Bore Inside Diameter (2)
Size Mark "00" 2.83464 (72.000)
Size Mark "01" 2.83467 (72.001)
Size Mark "02" 2.83471 (72.002)
Size Mark "03" 2.83475 (72.003)
Size Mark "04" 2.83479 (72.004)
Size Mark "05" 2.83483 (72.005)
Size Mark "06" 2.83487 (72.006)
Size Mark "07" 2.83491 (72.007)
Size Mark "08" 2.83495 (72.008)
Size Mark "09" 2.83499 (72.009)
Size Mark "10" 2.83503 (72.010)
Size Mark "11" 2.83507 (72.011)
Size Mark "12" 2.83511 (72.012)
Size Mark "13" 2.83515 (72.013)
Size Mark "14" 2.83519 (72.014)
Size Mark "15" 2.83523 (72.015)
Size Mark "16" 2.83526 (72.016)
Maximum Deck Warpage .0028 (.071)
(1) Cylinder bore diameter is identified by size mark on cylinder block. See Fig. 30 . Maximum diameter
is 3.5917" (91.229 mm).
(2) Main bearing bore diameter is identified by size mark on cylinder block oil pan flange. See Fig. 35 .

VALVES & VALVE SPRINGS

Application Specification
Intake Valves
Face Angle 44.5°
Standard Margin .039" (.99 mm)
Minimum Margin .020" (.51 mm)
Standard Refinish Length 3.7323-3.7520" (94.800-95.301
mm)
Minimum Refinish Length 3.7224" (94.549 mm)
Stem Diameter .2154-.2159" (5.471-5.484 mm)
Exhaust Valves
Face Angle 44.5°
Standard Margin .039" (.99 mm)
Minimum Margin .020" (.51 mm)
Standard Refinish Length 3.7342-3.7539" (94.849-95.349
mm)

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 2001 Lexus LS 430
2001 ENGINES 4.3L V8

Minimum Refinish Length 3.7244" (94.600 mm)

Stem Diameter .2152-.2157" (5.466-5.479 mm)
Valve Springs
Free Length 2.1279-2.1319" (54.049-54.150
mm)
Out-Of-Square .079" (2.01 mm)
Lbs. @ In. (kg @ mm)
Pressure 45.9-50.7 @ 1.380 (21-23 @ 35.04)

CYLINDER HEAD
Application Specification
Maximum Warpage
Cylinder Block Surface .0039" (0.100 mm)
Manifold Surface .0039" (0.100 mm)
Valve Seats
Intake Valve
Seat Angle 45°
Seat Width .039-.055" (1.00-1.40 mm)
Exhaust Valve
Seat Angle 45°
Seat Width .039-.055" (1.00-1.40 mm)
Valve Guides
Intake Valve
Valve Guide Cylinder Head Bore I.D.
Standard Valve Guide .4049-.4057" (10.284-10.305
mm)
Oversize Valve Guide .4069-.4077 (10.335-10.356
mm)
Valve Guide I.D. .2169-.2177" (5.509-5.530 mm)
Valve Stem-To-Guide Oil Clearance
Standard .0010-.0024" (.025-.061 mm)
Wear Limit .0031" (.079 mm)
Exhaust Valve
Valve Guide Cylinder Head Bore I.D.
Standard Valve Guide .4049-.4057" (10.284-10.305
mm)
Oversize Valve Guide .4069-.4077 (10.335-10.356
mm)
Valve Guide I.D. .2169-.2177" (5.509-5.530 mm)
Valve Stem-To-Guide Oil Clearance
Standard .0012-.0026" (.030-.066 mm)

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 2001 Lexus LS 430
2001 ENGINES 4.3L V8

Wear Limit .0039" (.990 mm)

CAMSHAFT
Application In. (mm)
End Play
Exhaust
Standard .0016-.0035 (.040-.089)
Maximum .0047 (.119)
Intake
Standard .0024-.0039 (.061-.099)
Maximum .0051 (.130)
Journal Diameter
Exhaust Camshaft
All Journals 1.0612-1.0618 (26.954-26.970)
Intake Camshaft
Timing Tube (1) 1.2198-1.2205 (30.983-31.001)
All Other Journals 1.0612-1.0618 (26.954-26.970)
Journal Runout .0031 (.079)
Lobe Height
Intake
Standard 1.6776-1.6815 (42.611-42.710)
Minimum 1.6717 (42.461)
Exhaust
Standard 1.6783-1.6823 (41.629-42.730)
Minimum 1.6724 (42.479)
Oil Clearance
Camshaft
Standard .0012-.0026 (.030-.066)
Maximum .0039 (.099)
Timing Tube Green Mark
Standard .0014-.0020 (.036-.051)
Maximum .0033 (.084)
Timing Tube Red Mark
Standard .0015-.0020 (.038-.051)
Maximum .0033 (.084)
Gear Backlash
Standard .0008-.0079 (.020-.201)
Wear Limit .0118 (.300)
(1) Exhaust camshaft thrust journal is the front (timing tube) journal.

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 2001 Lexus LS 430
2001 ENGINES 4.3L V8

VALVE LIFTERS
Application In. (mm)
Bore Diameter 1.2205-1.2211 (31.001-31.016)
Lifter Diameter 1.2191-1.2195 (30.965-30.975)
Oil Clearance
Standard .0009-.0020 (.023-.051)
Wear Limit .0028 (.071)

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