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Old 01-25-2011   #1
Hog
 
Join Date: Jul 2010
Location: Woodstock, Ontario, Canada
Posts: 1,275
Default Tensioner info, true or false

I just came across this info on tensioners.

Timing Chain Tensioner Caution On
1990-95 GM 5.7L VIN J Engines

The AERA Technical Committee advises the following caution when examining timing chain tensioners on 1990-95 GM 5.7L VIN J engines. This engine is also referred to as the LT5 or Corvette engine.

The left and right side timing chain tensioners on the LT5 engine should not be installed in their fully extended position. If a tensioner is installed in its extended position, it will create an extreme loading condition on the timing chain. This extreme loading has been the cause of timing chain breakage, which results in piston to valve contact and extreme engine damage. Attempting to compress a
fully extended tensioner may damage the internal seals and result in component failure after installation.

General Motors recommends replacement of both tensioners anytime they are removed from the engine. It is also recommended to check a new tensioner for overall length as shown in the illustration below. Any tensioner that is longer than 2.165 (55 mm) should be returned to GM as a defective unit. The right side tensioner is available under Part #10174324 and the left side is Part #1017425.

The AERA Technical Committee


Is this info correct?

Are those the most current part numbers for tensioners?

thanks

peace
Hog
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