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What causes a rattle in a car exhaust?

Updated: 12/7/2022
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15y ago

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catalytic convertor breaking down, or exhaust touching body or chasis of car

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15y ago
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Q: What causes a rattle in a car exhaust?
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Why is your 1998 Mitsubishi Mirage has a loud rattling noise whenever you press the accelerator?

there is a few rubber exhaust hangers, if they break the exhaust can rattle, also you have heat sheilds that point the heat away from the passenger compartment, with the car off, tap the exhaust pipe with your foot at the back of the car and listen for a corresponding rattle.


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What could be loose bad or going bad in my car that makes a rattle sound?

There could be hundreds of different things that could rattle. Give us more details. A common rattle is from the catalytic converter. The inside breaks and pieces get into the exhaust and rattle.


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What causes exhaust pipe metal sounding rattle from right rear of 1981 Corvette automatic at 1300 rpm in any gear but no rattle in neutral?

You need to check all the exhaust pipe hangers, one of them is letting the exhaust rattle against something. Also check muffler heat shield it could also be loose. When transmission in engaged in any gear the engine is torqued to the right, so that is moving the exhaust ( it is attached to the engine so it moves with the engine )into a position to rattle, in neutral the engine is sitting evenly in its mounts so no rattle. May want to check engine and trans mounts too.


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What causes black sooty exhaust?

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Why does your truck's catalytic converter rattle?

Becuase there is trash in it, or your exhaust is loose.


What could cause a catalytic converter to rattle.?

Catalytic converters do not rattle. If it does it will need to be replaced as it may block the exhaust. Loose heat shield?