Measuring Timing Chain Wear

Fig 1: Measuring Timing Chain Wear

Courtesy of CHRYSLER LLC

1 - TORQUE WRENCH

Position a scale next to timing chain so that any movement of chain may be measured.
Position a torque wrench and socket on the camshaft sprocket attaching bolt. Apply force in the direction of crankshaft rotation to take up slack to the following torque:
1. 41 N.m (30 ft. lb.) with cylinder heads installed
2. 20 N.m (15 ft. lb.) with cylinder heads removed
NOTE: With torque applied to the camshaft sprocket bolt, crankshaft should not be permitted to move. It may be necessary to block crankshaft to prevent rotation.

Fig 2: Measuring Timing Chain Wear
Courtesy of CHRYSLER LLC

1 - TORQUE WRENCH
Holding a measuring scale along edge of chain links.
Apply force in the reverse direction to the following torque:
1. 41 N.m (30 ft. lb.) with cylinder heads installed
2. 20 N.m (15 ft. lb.) with cylinder heads removed
Measure amount of sprocket/chain movement.
Install a new timing chain and sprockets if movement exceeds 3.175 mm (1/8 in.).