Timing Chain Inspection

Fig. 22 Timing Chain Length Inspection:

Fig. 23 Timing Chain Guide Track Wear:

Fig. 24 Timing Chain Tensioner Check:

Refer to Service and Repair for timing chain replacement procedure.

1. Inspect timing chain as follows:
a. Inspect chain for wear and damaged links.
b. Using suitable ruler, measure chain inner diameter, standard I.D. is 16.50-16.61 inch and service limit is 16.77 inch, Fig. 22.
c. Inspect chain guides for wear and cracks, measure chain track wear, standard is 0.0 inch, service limit is 0.0984 inch, Fig. 23.
d. Inspect timing sprocket teeth on crankshaft, camshaft and key for wear. Inspect camshaft thrust plate and sprocket thrust surface for cracks and wear.
e. Inspect tensioner operation, release plunger lock, ensuring piston moves freely.
f. Ensure oil feed hole is open, submerge tensioner in oil or solvent, depress plunger and check flow from tensioner body, check cylinder block port for blockage.
g. With timing chain and guides installed, measure plunger travel, Fig. 24, standard is 0.0696-0.438 inch, service limit is 0.8626 inch.