Up pipe leak
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Tuned
Joined: Aug 2010
Posts: 343
Likes: 7
From: Arizona
Up pipe leak
Not too long ago I replaced the old turbo up pipes with some new bellowed pipes. The truck seems happier with the new pipes (judging by the butt dyno) but there's one problem: on the driver side, where the pipe connects to the exhaust manifold, there is some soot that leaks out in one small spot right next to the bolt. I've tried disconnecting the pipe and reseating it, and then clean the soot off, but it just comes right back. Does the ex man need to be taken to the machine shop to have the ball-and-socket joint cleaned up? Is there some kind of gasket I could use, or Permatex Muffler and Tailpipe Sealer; would it handle the pressure?
Mountain Pass
Joined: Dec 2003
Posts: 151
Likes: 2
From: Hendersonville, NC
I was inspecting mine a few weeks ago wondering about leakage, deemed them suitable for use after sanding the high spots down. I had the trans out of the truck though. If you go so far as to remove the manifold I would use dychem and see where the high/low spots are and carefully use a cartridge roll on a dremel until contact is made full perimeter with hand pressure.
Logistics Pro
Joined: Nov 2006
Posts: 3,671
Likes: 367
From: Fallon,NV & Bainbridge OH
Start your truck and place your hand near the sooted area and feel for the exhaust. That will tell you what kind of leak it is. Check it with the manifolds both cold and hot. Due to the expansion rate of the cast manifolds it may very well seal itself when it gets hot and expands. I will bet when hot it is not even a big enough leak to worry about.
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Tuned
Joined: Aug 2010
Posts: 343
Likes: 7
From: Arizona
Do you mean Dykem layout fluid?
Tuned
Joined: Dec 2016
Posts: 260
Likes: 6
From: Southern Middle TN
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Hotshot
Joined: Dec 2012
Posts: 11,269
Likes: 1,654
From: Las Cruces New Mexico
Permatex makes a good copper exhaust sealant. I've use it once in a pesky up pipe to exahust manifold in a 6.0 chevy and worked good. Not sure how much more pressure our engines make but worth a shot trying it out.
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Mountain Pass
Joined: Dec 2003
Posts: 151
Likes: 2
From: Hendersonville, NC
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