6.0 high pitch whistle

fordman2121 · Jun 19, 2013

This thing is driving me nuts. Ive got a high pitch whine/whistle. Kinda like when you hold a balloon together and let the air out. It doesnt do it after driving for about 10 minutes, but if you shut it off for even a minute it will do it for a couple miles again. It only does it under load and it quits while it shifts. I replaced the y pipe due to soot, still there. Replaced the angle boot, still there. Ive got it pinned to the turbo area it sounds like. Any help its making me feel dumb.

bft blue oval boys · Jun 19, 2013

Degas bottle cap?...

Sent from a Cummins plant, driving a TDI, wishing it was a Powerstroke

Jeremysmith9902 · Jun 19, 2013

thats what it sounds like to me.. check coolant, and upgrade to a 6.4 degas cap.. they regulate pres. a lil better

ghohouston · Jun 19, 2013

Did it show up right after new up pipe install?

the chad · Jun 19, 2013

The up pipe/y pipe sounds like, but that doesn't really make sense with it stopping after 10 minutes. Does it get worse with acceleration?

Snake · Jun 19, 2013

Sounds like an exhaust leak that goes away when the pipes are fully heated, expand, and seal the leak.

fordman2121 · Jun 19, 2013

Break torqued it with degas cap off and still whistles. Replaced the y pipe to cure the noise but it didn't work.

Snake · Jun 19, 2013

Other things to consider: up pipe, exhaust manifolds, and alignment / seating of all of these.

Do you have bellows / flex sections in your y pipes? How about in the up pipe?

ghohouston · Jun 19, 2013

Maybe you didnt mate the y and the turbo exactly flush? Its a very real possibility

the chad · Jun 20, 2013

Did you by chance tighten the clamps one by one or put them all on loosely, and tighten them at roughly the same rate? That's what I do ESP if nothing is lining up easy

fordman2121 · Jun 20, 2013

The noise has never changed. I started all the bolts the started from top down tightining. I can't see it being the exhaust side since it was all off and new pipes put on with no change. Has anyone ran into where the turbo itself made the noise?

ghohouston · Jun 20, 2013

I mean no disrespect by this, but honestly I bet you didnt get the y mated to the turbo completely flush. Ive set well over 100 turbos, and even I gave trouble with them sometimes. Pull your v band clamp off to the y pipe, inspect closely with a mirror, all the way around it. If its not flush the whole way around, thats your leak, your clamp will probably have soot all on it too. Have you checked all exhaust tubing after the manifolds for soot?

Lassie · Jun 20, 2013

I always loosen the two flanges between the exh manifold and y pipe/egr pipe to help align at the turbo. Then I line up the v bands and tighten. Then tighten the EGR cooler or delete pipe flange and make sure the metal gasket is in there. Then I tighten the lower flanges. That's the surefire way to align the turbo bands.

fordman2121 · Jun 21, 2013

Found the whistle.....intake to egr cooler delete gasket. Hopefully I can just take the bolts out and slide in a new one.

ghohouston · Jun 21, 2013

Glad you figured it out!

DSTRYER · Jun 21, 2013

Not going to loi, when i first opened this up, I thought it was going to be someone asking "How do I make my 6.0 whistle like that? is there some sort of tune?" LOLLOLLOLLOL

jshalala · Jul 3, 2013

Off topic but I saw someone mentioned you can put a 6.4 degass bottle cap on a 6.0?
Do I just ask the dealer for a 2008 6.4 bottle cap?

Sent from my DROID RAZR HD

Mdub707 · Jul 3, 2013

When my up-pipe had a crack in it, it did the exact same thing. It had a really high pitch whistle at idle, but after about 10 minutes of run time the whistle would go away.