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Noise when revved

dengnath

dengnath

New member
I am new to the GP world. I used to have a park ave with the 3.8 s/c but it spun a rod bearing. So im taking another round with an 04 Grand Prix GT (couldnt afford a gtp) I bought it for $6200 from a Wilde Toyota which as a HUGE used car collection. It has 91,000 miles on it and came up to Wisconsin from North Carolina in 2008. Its got 2 blemishes on the outside but i figured it was a good deal. However, i have noticed a little bit of a clanky/popping noise from what sounds like the exhaust system when revved and is cold or has been cooling for a while. When the car is hot it will not make the noise. I am worried it is coming from the Catalytic converter. Is this something i need to be concerned about or is just hot air flowing through a cold exhaust? keep in mind i am in Wisconsin and right now it is getting down to the low 40's and high 30's.
 


coud be the down pipe exhaust flange gasket.... mine is leaking there.

Where in WI are you?

And iirc, the cat-conv have a warranty of 6 years 120K... not positive on those numbers?
 
I am in oak creek, which is just south of milwaukee. Would the flange gasket be covered under that warranty, and is it transferable because im not the original owner of the car?
 
All warrantys are different in there virbage so I would check. Can you get a vid of what sound it is making?
 


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