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C5 Open Discussion General and technical C5 Corvette discussion - ownership, maintenance, repairs, modifications, tuning

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Old 08-21-2014, 8:56pm   #1
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Default Hey everyone I got a balancer problem

I got a balancer (C5 Z06) that walked out 1/4-1/2 inch. The bolt came lose. When it was having the oil pan replaced I think they did something and put the used bolt back in. I know, big screw up. I'm doing a 25% under drive and arb bolt. 2 things. What should I look for as in damage and what is the toque specs for arb's. Thanks.
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Old 08-21-2014, 9:20pm   #2
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Other than tossing the belts (which it probably did), the only possible damage might be the front oil seal, which seals on the balancer hub surface. It's cheap and should be replaced anytime the balancer is removed. GM part #12585673.

The bolt may have scarred the steering rack tube when it backed out, take a look at that too.

The ARP bolt gets torqued to 235-240 lbs/ft.

You didn't say what balancer you're getting, but avoid the ASP aluminum unit, which is substantially lighter than stock...It's pretty well known to cause timing chain failures from it's inability to dampen harmonics. I used a 25% Powerbond/SLP balancer with good results.

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