Timing Component Alignment Marks: Locations
Timing Chain Alignment MarksFor complete service procedures for this component refer to Timing Chain Service and Repair Removal and Replacement
Install both secondary chains onto the idler sprocket and align the two plated links on the secondary chains to be visible through the two lower openings on the idler sprocket (4 o'clock and 8 o'clock). Once the secondary timing chains are installed, position the secondary camshaft chain holder 8429 (1) to hold the chains in place for installation.
Align primary chain double plated links with the timing mark at 12 o'clock on the idler sprocket and align the primary chain single plated link with the timing mark at 6 o'clock on the crankshaft sprocket.
Lubricate the idler shaft and bushings with clean engine oil.
NOTE: The idler sprocket must be timed to the counterbalance shaft drive gear before the idler sprocket is fully seated.
Install all chains, crankshaft sprocket, and idler sprocket as an assembly.
Guide both secondary chains through the block and cylinder head openings.
Affix the chains with an elastic strap or equivalent. This will maintain tension on chains to aid in the installation.
Align the timing mark (2) on the idler sprocket gear (3) to the timing mark on the counterbalance shaft drive gear (1), then seat idler sprocket fully.
Lubricate the idler sprocket bolt washer with oil, install the idler sprocket assembly and tighten the retaining bolt to 34 Nm (25 ft. lbs.).
NOTE: It will be necessary to slightly rotate the camshafts for sprocket installation.
Align the left camshaft sprocket "L" dot to the plated link on the chain.
Align the right camshaft sprocket "R" dot to the plated link on the chain.
CAUTION: Remove excess oil from the camshaft sprocket bolt. Failure to do so can result in over-torque of bolt resulting in bolt failure.
Remove the secondary camshaft chain Holder 8429, then attach both sprockets to the camshafts. Remove excess oil from the bolts, then install sprocket bolts, but do not tighten at this time.
Verify that all plated links are aligned with the marks on all the sprockets and the "V6" marks on the camshaft sprockets are at the 12 o'clock position.
CAUTION: Ensure the plate between the left secondary chain tensioner and block is correctly installed.
Rotate the engine two full revolutions and verify the timing marks are at the follow locations:
- Primary chain idler sprocket dot is at 12 o'clock
- Primary chain crankshaft sprocket dot is at 6 o'clock
- Secondary chain camshaft sprockets "V6" marks are at 12 o'clock
- Counter-balancer shaft drive gear dot is aligned to the idler sprocket gear dot
Lubricate all three chains with engine oil.
After installing all the chains, it is recommended that the idler gear (1) end play be checked. The end play must be within 0.10 - 0.25 mm (0.004 - 0.010 in.). If not within specification, the idler gear must be replaced.