Exhaust leak? Maybe...help!!

[KingStroker]

Ok GA folks...some of the best info I've gotten on the .org has come from you guys, so here it goes....

Anyone had a leaking up-pipe, down pipe, y-pipe whatever the heck is causing me all this noise? If so what does it sound like? I have this freaking terrible high pitched ear piercing "whistle" coming from behind the turbo somewhere...I'm thinking it has to be in one of these pipes or a connection to the turbo somewhere.

Oh and to add to the check list of trial and error items, I can lay under the truck and push up on the bend in the downpipe and it stops! Is there supposed to be some sort of gasket or something where the downpipe connects to the turbo?

Thanks for any help you can give guys...this thing is driving me crazy!

[Bubba88]

IIRC there's not any gaskets unless you have a cat. Have you taken the turbo out or loosened the DP recently?

[KingStroker]

No, the turbo was out about 10,000 miles ago when the egr delete and all was put in. I did remove the cat and put in a delete pipe right about the time the noise started. I'm wondering if I could have knocked something out of line or screwed something up putting that delete pipe in? I was prying pretty hard against the downpipe trying to get the stupid cat out...

[wright337]

The up pipes are bad about cracking. When you did the egr delete did you have the up pipe on the pass side replaced with a solid one or did you have the org pipe welded? First and cheapest thing to check would be to check all of the clamps. The one from the turbo to the down pipe, and both up pipes to the turbo. Also make sure the two bolts on both up pipes are tight. Then report back to us.

[sargar]

My vote is for a bad up pipe, especially if you can push up on the exhaust and make it quit. Look for a soot spot on the firewall, bellhousing, etc.

[KingStroker]

The EGR delete is the one from BPD, and it was on the truck when I bought it, so I can't speak for what they did there, but it is the original pipe not a solid one. I've looked for soot on everything and don't see any! I haven't checked the bolts from the manifold to the up-pipe yet...I'll try that. I'm starting to wonder if it's the actual turbo giving up the ghost???????

[wright337]

If it still has the org up pipe I would be willing to bet that is where the leak is. They get weak and start to leak in the flex part of the pipe. Where are you located? I have an org up pipe that was in good shape that came off of my 04. I replaced it with a solid pipe for this reason.

[Bubba88]

agreed....bad up pipe. I most of read right over the part that mentioned you can move the exhaust. lol. Listen to Mike(Sargar) and look for the soot spots.

[MWilbur516]

I say loosen your DP, get it back on the turbo and torque it back down. You shouldn't be able to put pressure on the DP and make the noise stop if it is an up pipe. If it is an aftermarket DP it would be a two piece with a clamp in the middle that could also be causing the leak/noise.

[KingStroker]

Thanks for all the replies guys...like I said in my OP best group on the .org! I'll check for more soot spots and such tomorrow (never going to be able to get of Valentine's Day with the fiance tonight haha) I'm almost sure at this point one of these pipes is to blame (y or up)...any thoughts on where to get replacements?

If it's my up-pipe I'll be in contact with you Lee...Thanks a lot man!