Exhaust leak fixed
Senior User
Joined: Jul 2009
Posts: 142
Likes: 0
From: So Cal Highland
Boy, I sure wish I had taken a better look at what you were doing prior to the actual removal of the manifolds. Did you see any evidence of leaks when you could finally look at them up close just prior to the actual removal? Or is the only visible evidence the soot on the manifold itself after removal?
Posting Guru
Joined: Feb 2005
Posts: 1,319
Likes: 1
From: Oregon
The reason I asked is those bolts tend to seize up pretty quick due to the thermal shock (heat cycles). In my experience, loose bolts in an exhaust manifold are pretty rare, but not machining a surface or adding a gasket after a rebuild can easily cause a leak. Wonder if that motor has been that way from day one? Something to file away in the back of the mind for future reference.
Senior User
Joined: Nov 2007
Posts: 110
Likes: 0
From: Chino Hills, CA
Nice write up...
...I am about to tackle this job myself. Just wondering if anyone has had any success fixing the leak with just tightening the bolts/nuts back to their original torque specs?
I am also curious, is the leak caused because the exhaust manifold is warping over time or are the bolts/nuts coming loose over time? If the manifolds are warping over time what is causing it, hot tunes or are stock engines seeing the same thing?
...I am about to tackle this job myself. Just wondering if anyone has had any success fixing the leak with just tightening the bolts/nuts back to their original torque specs?I am also curious, is the leak caused because the exhaust manifold is warping over time or are the bolts/nuts coming loose over time? If the manifolds are warping over time what is causing it, hot tunes or are stock engines seeing the same thing?
Laughing Gas
Joined: Aug 2008
Posts: 823
Likes: 5
From: Dallas, Oregon
Peter - could you hear one cylinder firing (kind of a knocking sound)? Several of us have a noisy #7 cylinder (rearmost on the passenger side), which is the worst one in your pictures. Maybe it is a manifold leak?
Senior User
Joined: Apr 2009
Posts: 395
Likes: 1
From: Texas
I dont see any air hoses(?) Did you do all this with just that little orange socket set?
Whats the the knuckle count on a job like this?
Whats the the knuckle count on a job like this?
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Thread Starter
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Because racetruck
Joined: Apr 2007
Posts: 2,786
Likes: 104
From: Monterey Bay, CA
Honestly, its one of the first jobs that I haven't killed my hands on. I did smash my thumb at one point but that was about it. I was surprised at how easy it really was.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
I'm guessing the torque will be 20foot lb.
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Because racetruck
Joined: Apr 2007
Posts: 2,786
Likes: 104
From: Monterey Bay, CA
Al, are you thinking of taking a stab at this?
