Century L4-2.2L VIN 4 (1994)
Timing Chain Tensioner: All Technical Service Bulletins
Service Procedure
1.
Using an Engine Ear J 39565 or an engine stethoscope listen to the area around the engine front cover and timing chain. It may be helpful to
compare any noises with a vehicle that is known to have good or new timing chain and tensioner components. Timing chain noise is most often
noted as a rattle or tick at idle speed that goes away at higher RPM. If the owner has a concern with engine noise and it does not appear to be
related to the timing chain, review any service bulletins related to engine noise and Service Manual diagnostics related to engine noise conditions.
2.
If timing chain noise is greater than normal, remove the engine front cover using procedures outlined in Section 6A2 or the Engine Section of the
appropriate Service Manual.
3.
Inspect the timing chain system for wear by measuring the distance between the hole in the tensioner bracket and the unworn surface of the
tensioner shoe. (See Figure 1). If the distance between the hole and the tensioner shoe surface is more than 8 mm (0.314 in.), replacement of
timing components is necessary.
4.
Turn the crankshaft so that the timing marks on the crankshaft sprocket and the camshaft sprocket are aligned with the tabs on the timing chain
tensioner bracket. (See Figure 2)
5.
Remove the timing chain tensioner, timing chain, and both sprockets using the procedures outlined in Section 6A2 or the Engine Section of the
appropriate Service Manual.
