METALLIC GRINDING/SCRAPING SOUND WHILE ACCELERATING

[tallguyinataco]

Hey folks. I’ve been trying to source a metallic grinding sound coming from my engine bay and I’ve had no luck. Hoping to be able to call in the troops to help me out. Here is what I know so far:

1. It usually happens while accelerating from a stop or while at low speeds. (1-2k RPM)
2. Only happens when the engine is hot; usually after a long drive.
3. can be recreated while revving in park (see video); when this happens it can most clearly be heard from the underside of the car and not as clearly from the hood.

So far I have been able to rule out any heat shields outside of the Catalytic converter. The transmission shouldn’t be the issue since it can be recreated in park and the driveline from there and further back would be stationary (not 100%on this but it makes sense).

I’m really at a loss at this point, I’m bringing it to the dealership since it’s luckily still under warranty, but it would be really helpful to go in with some useful information to give them.

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[Sagebrush]

I had a label that was half-loose on my driveline. But it only made the noise while moving.

 

[tallguyinataco]

I had a label that was half-loose on my driveline. But it only made the noise while moving.

yeah I checked the driveline and didn’t see any labels. Since it’s parked I think that’s ruled out. Thanks for the response!

 

[crepr12]

Sounds like a loose heat shield...god speed getting it sorted

 

[WKTJR1]

The video helps, I heard it.

 

[omar286]

Sounds like something loose on the exhaust system. Maybe a clamp maybe a heat shield

 

[tallguyinataco]

Sounds like a loose heat shield...god speed getting it sorted

That’s what I’m thinking too. Thanks for the good wishes!

 

[lpsoldia311]

You get this figured out? Im getting a very random and rapid metallic rattle every once in a while but only at certain speeds and engine loads. Gonna take a look at the heat shields first, but wondering what else it could be.

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