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Old 10-10-2004, 07:49 PM   #1
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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.
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Old 10-10-2004, 07:52 PM   #2
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Heli-coil
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Old 10-10-2004, 08:03 PM   #3
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what is a heli coil
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Old 10-10-2004, 08:56 PM   #4
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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 ?
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Old 10-10-2004, 09:49 PM   #5
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just the first part
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Old 10-10-2004, 10:07 PM   #6
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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
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Old 10-11-2004, 12:29 PM   #7
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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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Old 10-11-2004, 12:29 PM
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1991, 350, astro, balancer, bolt, center, chevy, crank, engine, harmonic, hermonic, sbc, size, striped, stripped, threads
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