Thread: Loud grinding noise when I punch the gas! (2005 Grand Prix GT)

Hello everyone,

I'm going to get right into the point...my car has been making a loud grinding noise when I punch the gas for about two months now. If I am traveling behind someone and punch it to pass them, it makes that loud noise. If I am sitting at a stop sign and punch it, it makes that noise. I have no idea what it could be, and before I take it to the mechanic to get checked out and get charged $80 dollars for someone to just look and see what it is, I was hoping the Grand Prix community could help me with this. The noise doesn't occur when I take off normally, and/or drive normally. I do not see any difference with the transmission shifting...it shifts as normal as can be. And when I say "grinding" its the best word I can use. It's more of a rapid tick/tap grinding noise. It has been two months before this post, and I am just getting around to finally wanting to figure it out.

I did do a search before putting this up on here, but it didn't find anything for me. If you know of another thread that might be worded differently and has the answer, that would be awesome. Any help is very appreciated. My car has other unknown problems too, but for right now, this noise is my main concern.

Thanks,
Josh

post a vid, that may help out. from what your saying it could be anything from motor mounts the the exhaust, to the pulleys on the engine.

You waited two months to try and identify a grinding noise? Hmmmm... Yet, LOVE your car! Hahaha, yeah, ok, doesn't sound like love to me.

Anyways... It's impossible to try and identify a NOISE without a sample. Post vid or fork over the $80 to let someone who can hear the grinding try to identify it. Either way, grinding is never normal or good, I would've immediately attended to it.

pop your hood, start the car. then shift from park, to reverse, then to drive, watch the engine. is if jerking a lot when shifted?

you can also have some one else shift it, stand at the front bumper, if the engine twists in the bay, the mounts are real shot. mine was doing this.


what mine looked like. this is really shot.

is it leaking/losing coolant?

Did you use straight water in the cooling system?

If your motor mounts are really bad, under WOT your engine will have a lot of movement. That movement can easily cause binding in the axles or transmission.

But I agree with everyone else, please get a vid of it an post it.

water pump is on its way out just did one on a gtp 05 and wot was the only time you could hear the bearings