Timing Chain: Inspection

Check chain, sprockets, tensioner and chain dampers for wear. Replace chain tensioner if width is less than .43" (11 mm). Minimum size for left and right chain dampers is .02" (.5 mm).
Measure length of timing chain with chain fully stretched. Maximum distance between 17 links should be 5.79" (147.0 mm). See Fig 1.
Wrap timing chain completely around camshaft sprocket. Using a Vernier caliper held parallel to sprocket, measure outer sides of chain rollers. Using same method, measure crankshaft sprocket and chain.
The minimum dimension for crankshaft sprocket and chain is 2.34" (59.4 mm). The minimum dimension for camshaft sprocket and chain is 4.48" (113.8 mm). If either measurement is less than minimum, replace timing chain and both sprockets.

Fig 1: Checking Timing Chain Stretch