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Re: 383 Exhuast leak problem
[Re: dodger1]
#179594
12/31/08 01:16 PM
12/31/08 01:16 PM
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Joined: Aug 2003
Posts: 4,384
Madison Wi
NTOLERANCE
master
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master
Joined: Aug 2003
Posts: 4,384
Madison Wi
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I would check to see if either of the two surfaces are warped. Expecially the pipe. Or the pipe isnt coming up to the manifold "true" meaning there is lateral tension on the pipe. This would cause the pipe surface and manifold surface to not mate up evenly.
Tried double gaskets?
I used to care but....... things have changed
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Re: 383 Exhuast leak problem
[Re: CR8CRSHR]
#179596
12/31/08 03:28 PM
12/31/08 03:28 PM
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Joined: Jan 2003
Posts: 17,841
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,841
S.E. Michigan
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He isn't talking about the gasket between the manifold and the head.
One thing I've noticed is that most muffler shops will make you an exhaust and will use a 3/8 bolt, which is a no-no because the hole in the manifold is something bigger (I think 7/16 but it's been awhile, I no longer run stock manifolds). The small bolt in a big hole allows everything to move around too much which causes gasket failure. But now that I typed all that, it will probably end up being something else.
Rich H.
Esse Quam Videri
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Re: 383 Exhuast leak problem
[Re: CR8CRSHR]
#179597
12/31/08 03:31 PM
12/31/08 03:31 PM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
If you are using the stock exhaust manifolds, then no gasket is required. All Mopars with stock exhaust manifolds were put on with out gaskets and thus were only metal to metal. Check the surface facing on the manifolds and the heads and if need be a slight swipe of the surfaces will true them up. But get rid of the gaskets as they are not needed....  
He said manifold to pipe flange not manifold to head... I fought a head pipe leak on my Challenger for years finally I bought a set of replacment flanges from Accurate LTD & rater then try cutting the original off & weld the new one on I sandwiched the new one between the original & the manifold then welded around the outside of both flanges...Haven't had a problem since...
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Re: 383 Exhuast leak problem
[Re: ZIPPY]
#179598
12/31/08 03:40 PM
12/31/08 03:40 PM
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Joined: Jan 2008
Posts: 3,886
Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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Quote:
He isn't talking about the gasket between the manifold and the head.
One thing I've noticed is that most muffler shops will make you an exhaust and will use a 3/8 bolt, which is a no-no because the hole in the manifold is something bigger (I think 7/16 but it's been awhile, I no longer run stock manifolds). The small bolt in a big hole allows everything to move around too much which causes gasket failure. But now that I typed all that, it will probably end up being something else.
Originally there was no gasket on the pipe, or head, side of the manifold. The gaskets are to take up slack ( So to speak) The mating surfaces have to be flat and even with each other. As the system heats up the seal should get tighter. If not the system will continue to leak as soon as the gasket gets burned out. I never had an luck stacking gaskets, ( 2 or more) but you just never know.
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Re: 383 Exhuast leak problem
[Re: 70RR383]
#179600
12/31/08 05:46 PM
12/31/08 05:46 PM
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Joined: Jan 2008
Posts: 3,886
Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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Quote:
One word,REMFLEX!!!.Best gaskets made. remflex.com
These motors do not need exhaust gaskets unless something is wrong.
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Re: 383 Exhuast leak problem
[Re: 70RR383]
#179603
12/31/08 06:14 PM
12/31/08 06:14 PM
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Joined: Jan 2008
Posts: 3,886
Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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Quote:
Thats very easy for you to say.Have you ever had a exhaust leak???It drives you crazy.If you want to be that way and assemble and reassenble your manifolds and exhaust,go ahead,for me I put gaskets(remflex and forget about it.Also he is talking about the manifold to EXHAUST,not head.
I make sure all mating surfaces are flat and no leaks. No gaskets on either mating surfage as I stated befor.
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Re: 383 Exhuast leak problem
[Re: bboogieart]
#179604
12/31/08 06:34 PM
12/31/08 06:34 PM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
Quote:
One word,REMFLEX!!!.Best gaskets made. remflex.com
These motors do not need exhaust gaskets unless something is wrong.
Really?
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Re: 383 Exhuast leak problem
[Re: 1_WILD_RT]
#179611
12/31/08 08:11 PM
12/31/08 08:11 PM
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Joined: Jun 2004
Posts: 3,319
Chicago Burbs
sthemi
master
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master
Joined: Jun 2004
Posts: 3,319
Chicago Burbs
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I had the same problem with them a couple of years ago, I tried new gaskets from a couple of places, new correct size 7/16ths bolts, but the real problem was a mis alignment between the pipe and engine. The pipe hit the engine or torsion bar and would not allow the gasket to do it's job. I had new head pipes made and installed at a local muffler shop and it was problem solved.
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