Bulletin: TB6041

Subject: Timing Chain Tensioner Installation Caution

Engine: GM 2.3L "Quad 4", 1987-1991

Clevite Part Number: 95188

Explanation:  The timing chain tensioner (#95188) on the subject engines is of the spring loaded ratchet design. The tensioner assembly consists of a housing, spring, and ratcheting plunger. The plunger is locked into the housing and plunger to prevent the accidental release of the spring before or during installation.

Once the tensioner is installed and the chain is in place, the anti-release device must be removed and the plunger manually depressed into the housing to unlock the plunger and release spring tension on the chain.

Failure to perform this important final step can lead to severe engine damage. Inadequate tension placed on the chain will eventually result in chain breakage and the consequential piston to valve contact.