4/30/2020 Printer Friendly View
YMMS: 2016 Cadillac ATS V Apr 30, 2020
Engine: 3.6L Eng License:
VIN: Odometer:
REPAIR INSTRUCTIONS - ON VEHICLE > CAMSHAFT POSITION ACTUATOR
REPLACEMENT - BANK 2 (LF4)
Special Tools
EN-48313 Timing Chain Retention Tool
For equivalent regional tools, refer to Special Tools (LF4) .
REPAIR INSTRUCTIONS - ON VEHICLE > CAMSHAFT POSITION ACTUATOR
REPLACEMENT - BANK 2 (LF4) > REMOVAL PROCEDURE
Fig 1: View Of Camshaft Flats Parallel With Camshaft Cover Rail
Courtesy of GENERAL MOTORS COMPANY
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 1/12
4/30/2020 Printer Friendly View
1. Remove the left camshaft cover. Refer to Camshaft Cover Replacement - Left Side (LF4) .
2. Remove the left intake and exhaust camshaft position sensors. Refer to Camshaft Position Sensor
Replacement - Bank 2 (Left Side) Intake (LF4) , and Camshaft Position Sensor Replacement - Bank
2 (Left Side) Exhaust (LF4) .
3. Remove the left intake and exhaust camshaft position actuator solenoids. Refer to Camshaft Position
Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake (LF4) , and Camshaft
Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust (LF4) .
NOTE: Rotate the crankshaft balancer bolt in a clockwise
direction ONLY.
4. Rotate the crankshaft balancer using the balancer bolt until the camshafts are in a neutral (low
tension) position. The camshafts will be parallel with the camshaft cover rail (1).
Fig 2: Locating Left Secondary Camshaft Drive Chain Timing Marks
Courtesy of GENERAL MOTORS COMPANY
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 2/12
4/30/2020 Printer Friendly View
NOTE: Ensure that the camshaft timing chain and the
camshaft position actuators are marked for proper assembly.
5. Use a paint stick to create an alignment mark on one of the timing chain links (2) and the adjacent
tooth on the exhaust camshaft position actuator (1).
6. Use a paint stick to create an alignment mark on one of the timing chain links (3) and the adjacent
tooth on the intake camshaft position actuator (4).
CAUTION: Refer to Torque Reaction Against Timing Drive
Chain Caution .
7. Use an open end wrench on the hex cast into the left intake and exhaust camshafts and rotate the
camshafts toward each other in order to create slack in the chain between the actuators.
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 3/12
4/30/2020 Printer Friendly View
Fig 3: Inserting Timing Chain Rentention Tool
Courtesy of GENERAL MOTORS COMPANY
8. Unscrew the EN-48313 tool so that the legs of the tool are retracted.
9. Insert the EN-48313 tool between the camshaft actuators, rearward of the timing chain until the
bottom line that is scribed in the body of the tool (2) is adjacent to the top surface of the cylinder head
(1). This is the approximate installed position.
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 4/12
4/30/2020 Printer Friendly View
Fig 4: View Of Feet, Legs & Timing Chain Guide
Courtesy of GENERAL MOTORS COMPANY
NOTE: The engine front cover is removed for clarity in the
following graphics, but NOT required to perform the procedure.
10. Ensure that the feet (4) on the legs of the tool are facing the front of the engine.
11. Partially expand the legs (1, 3) of the EN-48313 tool by turning the T-shaped handle clockwise.
12. Insert the leg of the tool (1) behind the timing chain guide (2).
13. Continue expanding the EN-48313 tool until the legs (1, 3) contact the timing chain. Do not tighten at
this time.
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 5/12
4/30/2020 Printer Friendly View
Fig 5: Foot of Timing Chain Retention Tool
Courtesy of GENERAL MOTORS COMPANY
NOTE: Ensure that the foot (1) of the EN-48313 tool is
engaged into one of the link pockets to prevent tool slippage
during tightening of the EN-48313 tool.
14. Hand tighten the EN-48313 tool.
15. Use an open end wrench on the hex cast into the left intake and exhaust camshafts and rotate the
camshafts toward each other in order to create slack in the chain between the actuators.
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 6/12
4/30/2020 Printer Friendly View
Fig 6: Timing Chain Retention Tool
Courtesy of GENERAL MOTORS COMPANY
16. The EN-48313 tool is now properly installed to hold the timing chain in position.
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 7/12
4/30/2020 Printer Friendly View
Fig 7: View Of Exhaust Camshaft Position Actuator Bolt
Courtesy of GENERAL MOTORS COMPANY
17. Use an open end wrench on the hex cast into the camshaft in order to prevent engine rotation when
loosening the camshaft position actuator bolt.
18. If replacing the exhaust camshaft position actuator, then remove the bolt and the actuator.
19. If replacing the intake camshaft position actuator, then remove the bolt and the actuator.
20. If removing both the exhaust and intake camshaft actuators, the timing chain can be draped over the
EN-48313 tool once the actuators have been removed.
21. Rotate the actuator in order to align the opening in the actuator reluctor wheel with the cam sensor
boss in the front cover, to allow actuator removal.
22. Remove the camshaft thrust washer.
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 8/12
4/30/2020 Printer Friendly View
REPAIR INSTRUCTIONS - ON VEHICLE > CAMSHAFT POSITION ACTUATOR
REPLACEMENT - BANK 2 (LF4) > INSTALLATION PROCEDURE
Fig 1: Locating Left Secondary Camshaft Drive Chain Timing Marks
Courtesy of GENERAL MOTORS COMPANY
NOTE: Ensure that the camshaft timing chain and the
camshaft position actuators are marked for proper assembly.
1. Align the exhaust camshaft actuator alignment mark (1) to the timing chain alignment mark (2) made
during disassembly.
2. Ensure that the intake camshaft actuator alignment mark (4) and the timing chain alignment mark (3)
are also aligned.
3. Position the exhaust camshaft actuator to the camshaft and install the actuator bolt hand tight.
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOption… 9/12
4/30/2020 Printer Friendly View
4. Remove the EN-48313 tool.
Fig 2: Identifying Camshaft Position Actuators
Courtesy of GENERAL MOTORS COMPANY
NOTE:
1. The camshaft position actuator will vary depending on
application.
2. Camshaft thrust washers must only be installed on
applications that had thrust washers present during
removal of the camshaft position actuators. Do not install
washers on applications if they are not already present.
5. If equipped, ensure the proper camshaft thrust washer is used. Use a 1.6 mm (0.063 in) thrust
washer on applications that have 5 attaching screws on the back side of the camshaft position
actuator (1). Use a 1.1 mm (0.043 in) thick thrust washer with yellow speckles on applications that
have 4 attaching screws on the back side of the camshaft position actuator (2).
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOptio… 10/12
4/30/2020 Printer Friendly View
6. Install the thrust washer, if applicable.
Fig 3: View Of Exhaust Camshaft Position Actuator Bolt
Courtesy of GENERAL MOTORS COMPANY
CAUTION: Refer to Fastener Caution .
7. If the exhaust camshaft position actuator has been replaced, then tighten the bolt to 58 N.m (43 lb ft).
8. If the intake camshaft position actuator has been replaced, then tighten the bolt to 58 N.m (43 lb ft).
9. If both the exhaust and intake has been replaced, then tighten bolt to 58 N.m (43 lb ft).
10. Install the left intake and exhaust camshaft position actuator solenoids. Refer to Camshaft Position
Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake (LF4) , and Camshaft
Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust (LF4) .
11. Install the left intake and exhaust camshaft position sensors. Refer to Camshaft Position Sensor
Replacement - Bank 2 (Left Side) Intake (LF4) , and Camshaft Position Sensor Replacement - Bank
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOptio… 11/12
4/30/2020 Printer Friendly View
2 (Left Side) Exhaust (LF4) .
12. Install the left camshaft cover. Refer to Camshaft Cover Replacement - Left Side (LF4) .
13. Install the intake manifold. Refer to Intake Manifold Replacement (LF4) .
https://www2.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=&hideOptio… 12/12
