What the heck is this sound?
 

"http://www.youtube.com/embed/EOOtwsbtYw4"

Re: What the heck is this sound?
 

almost sounds like a broken exhaust manifold bolt. Check the rear one(s) drivers side. Sounds is a bit different then mine, which has this issue, but guessing that is the cause.

Re: What the heck is this sound?
 

From one Joe to another.LOL(We share the same name). Thanks for listening, I hope that's all it is.What about the Oil pressure? Is that normal?

Re: What the heck is this sound?
 

:iagree:

Re: What the heck is this sound?
 

Oil Pressure? Not sure, no reference in video so not sure what your experiencing. In my case I have not seen a change to the oil pressure with the busted manifold bolt, certainly the sound you are experiencing.

if your seeing an oil pressure issue may be some other issue then the manifold bolt. Given the sound cadence with throttle check your belts, pulleys, and tension otherwise I''m guessing your in the motor and I'll leave that to far more knowledgable folks to troubleshoot.

Re: What the heck is this sound?
 

exhaust leak..

if you listen.. you can get the timing to it.

check your header bolts...


seems to be a rash of these popping up again

Re: What the heck is this sound?
 

Make sure you get the updated header bolts from GM when you change them.

Re: What the heck is this sound?
 

I've got this sound as well.

Re: What the heck is this sound?
 

Actually just checked mine. Drivers side rear bolt on manifold was indeed loose. And it will not tighten. Looks like it's broken. Sigh

Re: What the heck is this sound?
 

Ditto.Now I have an excuse to have my entire exhaust upgraded.Headers on back. Just have to find someone to do the work.

Re: What the heck is this sound?
 

I swear I must be jinx'ed
Seems like the minute someone on this forum has an issue, my truck gets it too.
Looks like I have a leak too. UGH!!!
If I didnt love this truck