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

Rattiling noise

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Old Mar 25, 2009 | 10:45 AM
  #1  
italia29's Avatar
italia29
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Default Rattiling noise

Hey, Over the last few months my 88 4+3 tranny vette has begun to rattle same times even at idle in a stopped position. I put it on my hoist last night but i couldnt find any loose parts. i can hear and feel it when i sit in the car and it comes and goes. Has anyone ever experienced this befor and if so what was the fix.

thanks
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Old Mar 27, 2009 | 11:04 AM
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89 Bob L's Avatar
89 Bob L
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Check your heat shields on the exhausts: exhaust manifolds, exhaust pipes, and cat. Many times the heat shields corrode near the welds and cause the problem.
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Old Mar 27, 2009 | 12:25 PM
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my stock exhaust was horrible. When I test drove the car I thought it was in the drive train, he assured me his mechanic told him it was the exhaust. I regretted buying it the first time I took it for a ride, and thought about it, then I realized it was only at certain rpms, I put on straights, and there are no problems at all.
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Old Mar 27, 2009 | 12:39 PM
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check your catalytic converters - sometimes they break up inside and the pieces rattle making it sound like it is coming from the drive train. It happened in my '85.
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Old Mar 27, 2009 | 01:54 PM
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Your lucky, My car even makes rattling sounds when the motor is turned off..:WW

Last edited by WW7; Mar 27, 2009 at 02:09 PM.
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Old Mar 27, 2009 | 06:20 PM
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+1 for heat shields on exhaust, mine sounds like a penny in a beer can over bumps. One of these days when I'm feeling ambitious I'll take care of it....
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