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Timing chain Subaru B9 Tribeca
EZ30/3 (WX)
Auxiliary drive belt
Special tools
Crankshaft pulley holding tool - No.ST499977100.
Crankshaft sprocket holding/turning tool - No.ST18252AA000.
Exhaust camshaft sprocket holding tool - No.ST18231AA020.
Flywheel locking tool - AT (starter motor aperture) - No.ST498277200.
Inlet camshaft sprocket holding tool - No.ST499977500.
General precautions
Disconnect battery earth lead.
Remove spark plugs to ease turning engine.
Turn engine in normal direction of rotation (unless otherwise stated).
Observe tightening torques.
If fitted: Mark position of crankshaft position (CKP) sensor before removal.
Do NOT turn crankshaft via camshaft or other sprockets.
Do NOT turn crankshaft or camshaft with timing chain removed.
Valve timing procedures
Removal
Ensure engine at TDC on No.1 cylinder.
Ensure crankshaft sprocket TDC timing mark at 12 o'clock position 1 .
Remove RH timing chain tensioner 2 .
Remove RH tensioner rail and guides 3 , 4 & 5 .
Remove RH timing chain 6 .
Remove LH timing chain tensioner 7 .
Remove LH tensioner rail and guides 8 , 9 , 10 & 11 .
Remove upper idler sprocket 12 .
Remove LH timing chain 13 .
Installation
Reset chain tensioners:
Using hand pressure only, compress the tensioners.
Insert suitable pins to lock tensioner plungers.
Camshafts can be turned without valves contacting pistons when crankshaft set at 90° BTDC on No.1 cylinder 14 .
Ensure keyway of each exhaust camshaft sprocket aligned at 12 o'clock position 15 .
Align sprocket of each inlet camshaft 16 :
Position RH inlet camshaft sprocket timing mark 50° after 12 o'clock position.
Position LH inlet camshaft sprocket timing mark 75° after 12 o'clock position.
Ensure crankshaft sprocket TDC timing mark at 12 o'clock position 1 .
Install LH timing chain 13 .
Ensure gold coloured link aligned with crankshaft sprocket timing mark 17 .
Ensure dark blue coloured links aligned with timing mark of each LH camshaft sprocket 18 .
Install upper idler sprocket 12 .
Tighten upper idler sprocket bolt to 69 Nm.
Install LH tensioner rail and guides 8 , 9 & 10 .
Install LH timing chain tensioner 7 .
Tighten LH timing chain tensioner bolts to 16 Nm.
Install RH timing chain 6 .
Ensure dark blue link aligned with LH timing chain dark blue link at lower idler sprocket 19 .
Ensure gold coloured links aligned with timing mark of each RH camshaft sprocket 20 .
Install RH tensioner rail and guides 3 , 4 & 5 .
Install RH timing chain tensioner 2 .
Tighten RH timing chain tensioner bolts to 16 Nm.
Install LH timing chain guide 11 :
Check clearance 21 between LH timing chain guide 11 and RH timing chain guide 5 .
Check clearance is 8,4-8,6 mm 22 .
Tighten timing chain guide bolts to 7,8 Nm 11 .
Remove timing chain tensioner locking pins.
Note: Bolts for timing chain guides 4 , 9 & 11 MUST only be used once.
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