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Intake manifold gaskets
#1
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ks114
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Hi, I suspect that the intake manifold gaskets on my 1955 Patrician need replaced, due to the fact that I can't get a good adjustment on the idle air.
I will spray carb cleaner around the gasket areas to confirm this.
My question is, which manifold gasket should I use? Steel or composite?
Thanks!

Posted on: 2015/4/3 16:52
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Re: Intake manifold gaskets
#2
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Owen_Dyneto
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I suspect that, properly installed, either will perform satisfactorily. When I did my 56 intake I used OEM steel intake manifold gaskets, never a problem. Composite gaskets might be a bit more forgiving.

Have you run a manifold vacuum test first before condemning the gaskets? And of course checked all the other possible locations for a vacuum leak?

Posted on: 2015/4/3 17:14
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Re: Intake manifold gaskets
#3
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ks114
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On my "to do" list

Posted on: 2015/4/3 17:29
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Re: Intake manifold gaskets
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d c
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Are you using the original carb? Is it the 4gc ? Have you had it rebuilt and have you temporrarily removed and plugged all vacuum hoses?

Posted on: 2015/4/4 11:22
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Re: Intake manifold gaskets
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R H
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my 56 is apart again, but i had same problem,,

can the heat tube cause this?,, i think mine might be leaking on bottom of manifold,,

Posted on: 2015/4/4 16:52
Riki
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Re: Intake manifold gaskets
#6
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Owen_Dyneto
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...can the heat tube cause this?,,

Possibly, if the bottom end has rotted away - that would lead to a vacuum leak which should be easily noticeable if you test with a vacuum gauge. It's simply a piece of steel tubing swedged at both ends and very easy to make and install a new one, I did so on my 56. Of course you have to have the manifold off to do so.

Posted on: 2015/4/4 17:24
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