Since putting my new exhaust on (post-cat)...I've had this "ping" occasionally from the exhaust. Sounds as if someone is taking a small metal bar and hitting the exhaust.

Random intervals, pretty loud, does it whether the engine is off or on. Only does it when warmed up though. I can't narrow it down due to the randomness of it.

Any ideas? Thanks.

 

Zach, what you are describing is the expansion and contraction of the metal of the exhaust pipe. Not much you can do about it but it will get better as the metal in the pipe begins to age and becomes "seasoned".

 

It never did it before, even when I had my exhaust before...something in the new muffler perhaps? I used alumnized steel for the whole exhaust, save the tip which is stainless.

 

Hangers aluminized? or steel?

 

Aluminized I believe. I reused the ones from the previous installation that I had in the garage... they appear aluminized to me, definetly not stainless.

 

N/m I'm an idiot