Exaust problems

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Mar 14, 2010 | 06:15 PM

dwmb25

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Exaust problems

I have a 1976 ford with a 390 in it and I am having problems with exaust leaks around the manifold. I have replaced the gasket many times. I was wondering what some of you have done to fix the problem.

Mar 14, 2010 | 06:17 PM

starmilt

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Joined: Oct 2007

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From: Faibanks Ak.

I have used header gaskets before.

Mar 14, 2010 | 06:54 PM

$MonsterTruck\m/'s Avatar$

MonsterTruck\m/

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Make sure the mating surface is clean on both the manifold and the head, try using a grinder to get off all extra gasket and if worse comes to worse just buy some headers

Flowtech 12540 Flowtech Headers
should fit your truck

Mar 14, 2010 | 07:15 PM

mikeo0o0o0

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Joined: Apr 2009

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From: Stanley, VA

I took my manifolds to a machine shop and had them ground to be sure they were flat and true. It was a little expensive but they have zero leaks.

Mar 14, 2010 | 09:41 PM

fastfarmer

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Joined: Mar 2007

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From: southwest Wisconsin

You probly don't want to hear this but after 34 years of use with rust and leaks sometimes both the mating surfaces - manifolds and heads - need to be milled in order to seal well. Short of that, cleaning both surfaces really well and applying a little hi temp RTV to the gaskets might help.

Mar 14, 2010 | 10:59 PM

sdg0080

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yeah you need to get them surfaced...

Mar 15, 2010 | 11:51 AM

GeoClark

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Joined: Mar 2010

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From: Saskatchewan

I had mine surfaced and then installed with red silicone.

They leaked again _ a little.

Minute Muffler shop said the silicone had gone out and to use two gaskets next time.