Third Generation F-Body Message Boards - harmonic balancer center bolt stripped

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omarr

10-10-2004 07:49 PM

harmonic balancer center bolt stripped

bolt came loose and wobbled. pulley came off. i took the balancer out but the crankshaft hole is stripped. the centerbolt wont go back in.

RB83L69

10-10-2004 07:52 PM

Heli-coil

omarr

10-10-2004 08:03 PM

what is a heli coil

NascarFool

10-10-2004 08:56 PM

Heli-Coil

You could also try to use a tap and thread the hole to fit a different size bolt. Is it completely stripped or just the first part of the threads stripped ?

omarr

10-10-2004 09:49 PM

just the first part

THEGENERAL

10-10-2004 10:07 PM

how deep on the bolt is it stripped???

id get a new bolt for it and a tap and clean the threads out really good and see if it will work

a73camaro

10-11-2004 12:29 PM

The stock hole in the crank is 7/16" x 20

The next size bolt is 1/2" x 20

First try to tap the existing hole with the 7/16" tap. Make sure that the bolt has clean threads.

If the threads are too buggered up, then tap with 1/2" x 20 and buy a larger bolt. Also any of the 7/16" threads will help guide the 1/2" tap.

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