colorado2500hd

Hello,

Recently finished up cams/heads/headers on a 2003 2500HD with the 6.0. Thanks to everyone who helped with advice, etc.

The exhaust has a strange kind of higher pitched sound to it that almost sounds like an exhaust leak. Here is a video of it:
I can't tell if that's just the way it's supposed to sound, or if there's something wrong.

There is a low tone to it, from the muffler, but this higher pitched almost like a ping sound. It's definitely not coming from the engine compartment - I can say that much because when I had leaking manifolds the sound was definitely from inside the engine bay, this seems to be under the car.

Any ideas?

Thanks!!

shakenfake

Sounds normal to me. An exhaust leak is going to sound like a tick tick tick tick

dantheman1540

Sounds normal to me, one of the reasons I toss around the idea of going back to stock manifolds. Cam sounds good tho!

shakenfake

Dan swap headers for manifolds?

dantheman1540

Nice try! I have a set just don't want to rework the exhaust again for them. I was very close to putting them on a week ago before the exhaust shop visit but glad I didn't it's pretty darn quiet now, manifolds might make it totally stock sounding.

colorado2500hd

Dan - what did your exhaust shop do to help quiet down?

I have a large-ish Magnaflow and stock cats, still a little loud for my liking.

shakenfake

How are you running stock cats with long tubes?

colorado2500hd

Shake - cats are located farther back on the 3/4 ton trucks.

shakenfake

Oh duh lol

dantheman1540

I have 4 mufflers and no cats right now, it's dual 3" into a single 4" and out over the axle. It's not stock quiet and the SUVs seem to transfer the sound into the cab much worse than the trucks but it's quiet enough I can hear the lifters again.


Excuse the sideways video I'm tech Inept