TSB Number: 100237
Title: Timing Chain Rattle/Noise
Date: January 1996
Model: 1996 Chevrolet Cavalier
Engine: 2.2L Ecotec
Summary:
Some 1996 Chevrolet Cavaliers equipped with the 2.2L Ecotec engine may exhibit a timing chain rattle/noise during engine start-up or when the engine is cold. This noise is typically caused by a loose timing chain tensioner.
Correction:
Dealers should replace the timing chain tensioner with an updated tensioner. The updated tensioner has a revised spring and plunger design that helps to reduce noise.
Procedure:
1. Remove the valve cover.
2. Remove the timing chain tensioner bolt.
3. Remove the timing chain tensioner.
4. Install the new timing chain tensioner.
5. Torque the timing chain tensioner bolt to 20 ft-lbs.
6. Install the valve cover.
NOTE: If the timing chain is extremely loose, it may be necessary to remove the timing chain and replace it with a new one.
Additional Information:
If the timing chain noise persists after the tensioner has been replaced, there may be a problem with the timing chain guides or the timing chain itself. In this case, the engine will need to be disassembled to inspect the timing chain and guides.
