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???
89 g.m. 3.8 harmonic balancer -right or left thread pattern??
Jul 30, 2005
2 Replies
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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