Measuring Timing Chain Wear

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Measuring Timing Chain Wear

Courtesy of CHRYSLER LLC

1 - SECONDARY TENSIONER ARM

2 - SECONDARY CHAIN TENSIONER PISTON

NOTE:

This procedure must be performed with the timing chain cover removed.

Remove the timing chain cover. Refer to CHAIN and SPROCKETS, Timing , Removal , 3.7L .
To determine if the secondary timing chains are worn, rotate the engine clockwise until maximum tensioner piston (2) extension is obtained. Measure the distance between the secondary timing chain tensioner housing and the step ledge on the piston. Refer to Fig 1. The measurement at point (A) must be less than 15mm (.5906 inches).
If the measurement exceeds the specification the secondary timing chains are worn and require replacement. Refer to CHAIN and SPROCKETS, Timing , Removal , 3.7L .