C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

L98 knock ---- Possible balancer bad?

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Old 12-13-2011, 07:19 PM
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wa4ky
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Default L98 knock ---- Possible balancer bad?

Hello, one member wrote me that a harmonic balancer may cause a knock sound. Anybody have history of this? My knock is not loud when cold, but is loud when hot.

Is there an easy way to spot a bad balancer?

Thanks!
Old 12-13-2011, 07:29 PM
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JrRifleCoach
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A bad balancer is usually easy to spot just before it flies off!

Sorry

Last edited by JrRifleCoach; 12-13-2011 at 07:40 PM.
Old 12-13-2011, 10:45 PM
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cv67
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Your timing marks will probably be off or inconsistent.

Yes it can cause a knock. Drive it too much and it can cause a bang. btdt.
Old 12-13-2011, 11:23 PM
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mrmmoore
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Here is a video of what mine (l83) sounded like before the balancer went.



Pic of the 2 pc balancer.


Last edited by mrmmoore; 12-13-2011 at 11:28 PM. Reason: added still photo..
Old 12-14-2011, 04:16 PM
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Pete K
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When you pulled the motor apart to put new bearings in, what condition was the balancer?
If it was bad, you would have seen it.

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