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Old May 14, 2015 | 01:21 PM
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Default harmonic balancer

Hello everyone.

I guess I'm the new guy.
I have a bit of a question about the 70 I'm working on. the balancer is toast someone beat it with a hammer during a past install and the rubber is badly cracked it is 8" by 1" 47/64. I have a dorman replacement that is 8" by 1" 5/16 The timing marks are the same, but the dorman is about three pounds lighter. It is internally balanced. I cant seem to locate one the same size as the original. My local chevy dealer is not any help. Any thoughts?

Thanks Robert
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Old May 14, 2015 | 01:39 PM
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Use the new one. It'll work just fine.
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Old May 14, 2015 | 02:37 PM
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If you want one to look original, hit up a vendor like Willcox or Ebay.
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Old May 14, 2015 | 03:43 PM
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I had the same problem on my '70, I was told the one fitted was for a truck engine and the new one I bought was lighter. I fitted it and it works fine.
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Old May 14, 2015 | 03:59 PM
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Have you looked at DamperDudes http://www.damperdudes.net//index.php
I have not purchased Harmonic Balancer but did used them to a rebuild Harmonic.

John
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Old May 15, 2015 | 07:42 AM
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Thanks again, I'm gonna go with the one i have. Plus a couple pounds of doesn't hurt either.
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Old May 15, 2015 | 11:39 AM
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Originally Posted by Bobcat68
Thanks again, I'm gonna go with the one i have. Plus a couple pounds of doesn't hurt either.
The balancer on mine failed a few years ago. I used the GM ZZ4 balancer. It was an exact fit, I also checked the timing mark/tab and it was right on. (Used piston stop)
1970 LT-1 and L-46 use the same 8" balancer.
http://www.jegs.com/i/Chevrolet+Perf...60269/10001/-1

Last edited by Barry's70LT1; May 15, 2015 at 11:45 AM.
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