Engine, driveline, or exhaust knocking when warming up.
4/16/12, 09:14 AM
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Engine, driveline, or exhaust knocking when warming up.
It's been around 35F these past few weeks, or colder when I start my car.
When I first start the vehicle, the engine is quiet. You can stand outside the car, and after a minute or two the knocking starts. It's not a tick, more of a knock. This continues until the engine gets up to operating temp, when the noise is gone again.
Probably nothing I'll ever track down. I think exhaust manifold leaks are higher pitched. It sounds like it's coming from the transmission/flywheel area. I've heard of the ring gears separating from the flywheel on these cars, making a noise until the car is warm and the parts fit more tightly. Could also be piston slap I suppose, however you'd think that would be most prevalent immediately upon startup.
Anyone else have a similar "issue" or any insight?
Thanks
When I first start the vehicle, the engine is quiet. You can stand outside the car, and after a minute or two the knocking starts. It's not a tick, more of a knock. This continues until the engine gets up to operating temp, when the noise is gone again.
Probably nothing I'll ever track down. I think exhaust manifold leaks are higher pitched. It sounds like it's coming from the transmission/flywheel area. I've heard of the ring gears separating from the flywheel on these cars, making a noise until the car is warm and the parts fit more tightly. Could also be piston slap I suppose, however you'd think that would be most prevalent immediately upon startup.
Anyone else have a similar "issue" or any insight?
Thanks
Last edited by eighty6gt; 4/16/12 at 09:19 AM.
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