Exhaust leak

[unitedsecorp]

I am having a loud exhaust leak sound when truck is under load (climbing) and also on decel with jake break on high. Replace flex exhaust pipe that was shot, but sound is the same.

[theakerstwo]

Then check for a manifold gasket leaking or a head gasket leaking.

[Noid93]

I guessing if you had bad exhaust flex pipe, you have a bad pipe elsewhere. Its faily common to have leaks right by the heavy steel clamps that hold the pipe to the frame.

[staxx]

Check for boost leak in piping to charge air cooler and look make sure charge air cooler doesnt have a crack.

[theakerstwo]

Then check for a manifold gasket leaking or a head gasket leaking.

Sounds like i was reading in a chiping noise but did not read question good.

[Challenger]

What truck or engine do you have?

[unitedsecorp]

Truck is a 2002 granite with etech 400hp. Did find a small oil leak on valve cover seal, don't know if it is related.

[Challenger]

Truck is a 2002 granite with etech 400hp. Did find a small oil leak on valve cover seal, don't know if it is related.

I wouldnt think its related. Check for any boost leaks as stated already above, Check the aircompressor air intake line that feeds off of the intake manifold. The hoses can blow and the metal line can rub through. A hole in the metal line can be hard to see.

[Javier89]

I am having the same problem and replaced the same pipe any update to what was causing that noise 

[880joe]

I had a similar situation and it was the gasket between the turbo and exhaust manifold

[Javier89]

How did you find out it was that 

[880joe]

After about 100 miles of driving you could see a little bit of smoke residue where it was leaking

[fjh]

Check the compressor inlet hoses as well 1 inch hose At the bottom  rear of the inlet manifold And the most common Failure is the one @ the compressor head!