Recently, after i go WOT through a couple gears, I hear a sort of knocking/vibrating noise from under my car towards the front. And it only does it for a couple minutes or so and it goes away. Usually only in 1st gear starting from a stand still. I recently had changed the gaskets and bolts on my exhaust also if that helps any. Anyone have this problem before?

 

considering you just did some exhaust work, my guess would be its related to that. things are probably settling right now, and metal can make some funky sounds when it experiences different temps. i would also recheck your work.

 

UPDATE: I don't know if it has anything to do with it. But it is HOT today and it is making the noise even when I don't push it. Sound's liek something is pushing against something else under/front of my car..

 

did it sound like this?

http://www.youtube.com/watch?v=r5FWUJho_bE

 

Sound's kinda like that but doesn't happen just on idle. Only during certain times where it seems like things get hot. And I don't have any CEL or anything?

 

like fish said recheck your work that be what id do/and have done before

 

Thanks for the replies. Anyone else? Some one here has to have had the same problem.