Topic: underbody rattle
in Forum: C3 Driveline Components
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I have a noise only when first accelerating from a dead stop. Sounds like a loose exhaust heat shield, kind of a tinny rattle. But I have been under it and no shields are loose and I replaced the rear y-pipe and the mufflers because I had a broken muffer baffle. The noise is still there. Thought maybe I should pull the spare tire and holder to see if I still hear it. Hope someone has heard this one before. Thanks
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Clearence between the rear Y pipe and the differential is pretty close. My white 79 rattles a little bit there.
mkapp7879 2008-02-15 20:19:22
edit: come to think of it. I have a service work order from when my black 79 was brand new. Same rattle as the white one.
If your clearence is as close as mine are, jamb a wood shim between the diff and Y and take it for a spin. Won't rattle if it can't move.
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Could be a u-joint on it's way out, or the front diff cushion is bad, and the u-joint is hitting somewhere.
Could also be the parking brake...something may be loose inside the rear rotor, and making a tinny noise.
Could also be the parking brake...something may be loose inside the rear rotor, and making a tinny noise.
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Heat shield on the cat conv?
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Can you put it up on 4 jack stands and run it in gear while you look (but don't get) underneath. Sometimes when you are in the car the source of the noise can fool you.
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[QUOTE=LukesVette] Heat shield on the cat conv?[/QUOTE]
Paul gets my vote... that's where I found mine.
Then when I installed the new headers 1 pipe on the drivers side would hit the crossmember and rattle at about 750 RPM. Always something......
Paul gets my vote... that's where I found mine.
Then when I installed the new headers 1 pipe on the drivers side would hit the crossmember and rattle at about 750 RPM. Always something......
in Forum: C3 Driveline Components
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