2500 RPM Noise

[OilCanBoyd]

I notice when my GSR hits 2500 RPM when I let off the gas and the car is revving down it always makes this strange humming noise. Does't really matter what the gear is. Anyone else have this happeneing. Cars got about 90,00 on it.

Thanks

[dubcac]

Heat shield on the cat.

[OilCanBoyd]

Ya I tried tightening that down the best I could. It rattles real bad after a while if I don't keep tightening it but I was thinking this noise was something different. Maybe you are right.

Also can I just take this heat shield off if Im not parking on dry grass?

[dubcac]

I would just remove it, that's what most people do.

[Provocateur]

It could be a faulty exhaust manifold. I bought a DC sports header because of that noise. It turned out that the welds in the stock log were cracked.

[yurey]

I got a similar issue. I have an automatic but when reving up and the down in low gear I hear a metal grinding noise when letting go of the gas. Dealer is supposed to look at it soon. People suggested a bad torque converter...so will see..

I only got 48K on mine

[dubcac]

It could be a faulty exhaust manifold. I bought a DC sports header because of that noise. It turned out that the welds in the stock log were cracked.

Another common problem.

[OilCanBoyd]

How much for an exhaust manifold?

[aboobybobpleez]

how about a metal ringing sound from under the car only when i hit 1500 rpm anyone know?

[silvagsr]

If its an aftermarket exhaust, it may be your b-pipe. I had to replace my b-pipe on my comptech cat-back, and noise stopped.

[dubcac]

How much for an exhaust manifold?

You can check yours for cracks/leaks by looking at it from underneath. Aftermarket headers are usually $300 or so and up. I would try taking the cat heat shields off first.

[rslsgsr]

yeah, i get a metal humming noise at about 2700...
everytime i hit 2700 rpm i could hear it and when i go past 2800 rpm it stops...
if i keep my needle at 2700-2800, it is a constand humming noise....
but then again, my car makes so much noise... i learn to accept it...

[Provocateur]

The A pipe is usually the one that poops out. An OEM replacement will run you $600 whereas you could replace the whole manifold with an aftermarket for less than $300 and get some HP gains from it.

[OilCanBoyd]

My shop helped me determine that it is the A pipe. What is a good header for this car. If it helps performance that would be great. I'd like to keep the pice down. The car is stock. Thanks

[LT]

the header bracket (bolts to collector and engine block) can break in half, resulting in the 2 pieces vibrating against each other. this happened to me, and i just removed it - problem solved.

[Provocateur]

My shop helped me determine that it is the A pipe. What is a good header for this car. If it helps performance that would be great. I'd like to keep the pice down. The car is stock. Thanks

DC Sports. Either ceramic or ss. Stainless Steel looks better and lasts longer but is a bit more expensive. It will probably run you about $300-350 for a new one.

[carta79]

If its an aftermarket exhaust, it may be your b-pipe. I had to replace my b-pipe on my comptech cat-back, and noise stopped.

Do you still have the Comptech B-pipe, or was it sold?