89 g.m. 3.8 harmonic balancer -right or left thread pattern??

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ronssilverado - 31 Jul 2005 00:27 GMT

The harmonic balancer in my 89 riviera is seperated at the rubber and
making a bad noise. I have my impact ready to go but question the right or
left handed thread pattern.Also, would it be a ok to heat that big bolt up
if I can't get it to move???

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Shep - 31 Jul 2005 00:44 GMT

Std r/h thread, counter clockwise to remove, a good impact will get the bolt
off.

> The harmonic balancer in my 89 riviera is seperated at the rubber and
> making a bad noise. I have my impact ready to go but question the right or
> left handed thread pattern.Also, would it be a ok to heat that big bolt up
> if I can't get it to move???

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=AB Paul =BB - 31 Jul 2005 05:45 GMT

Standard rh thread. Heating up the bolt won't do much good, you will be
heating the entire crankshaft - not good for the engine.
Using a good impact wrench at over 100 psi at the wrench, not at the
compressor, (120 psi is better) will get the bolt out.

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