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

Have a grinding noise

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Old Dec 20, 2001 | 11:21 AM
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St. Jude Donor '05-'06-'07-'08-'09-'10
Default Have a grinding noise

ok this started about a week ago. When ever I am at a low RPM I get the really horrible sounding grinding noise coming from underneath me First I though my brakes but I doubt it as it rarely happens when I am on them. So do you have any ideas?
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Old Dec 20, 2001 | 01:29 PM
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Default Re: Have a grinding noise (MBVette)

could be a bad wheel bearing... a loose exhaust...

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Old Dec 20, 2001 | 02:02 PM
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Default Re: Have a grinding noise (MBVette)

Where underneath and how loud is it?
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Old Dec 20, 2001 | 06:11 PM
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St. Jude Donor '05-'06-'07-'08-'09-'10
Default Re: Have a grinding noise (MBVette)

ok it is beneth the pedals maybe under the seats but no farther back. It only happens at idle to about 1.5k RPM's. It is not a real loud noise, kind of like a grinding/rubbing sound. Kinda hard to explain
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Old Dec 20, 2001 | 07:11 PM
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Default Re: Have a grinding noise (MBVette)

Does it do it both when the clutch is in and out?
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Old Dec 20, 2001 | 07:13 PM
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Default Re: Have a grinding noise (Vette92)

yes when it is in or out
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Old Dec 20, 2001 | 07:16 PM
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Default Re: Have a grinding noise (MBVette)

I don't know...I was going to say it could be the throwout bearing, but I think you would only have the noise when the clutch is engaged.
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Old Dec 20, 2001 | 08:01 PM
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Default Re: Have a grinding noise (MBVette)

I would say it's a loose/leaky exhaust, had a similar noise thought it was the torcconverter cuz i only had it while accelerating - turned out that when the engine shifted just a bit in it's mountings a tiny crack opened just infront of the cat....
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Old Dec 21, 2001 | 06:41 PM
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Default Re: Have a grinding noise (Daniel DK)

I vote for leaky exhaust as well. I was getting a similar noise from my car in about the same place right after putting my Corsa exhaust on the car. Just needed to tighten up a few of the clamps a little more to fix. :smash:
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