Farm Equipment - CA No Manifold Gasket?

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CA No Manifold Gasket?

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=210051
Printed Date: 13 Feb 2026 at 12:32pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: CA No Manifold Gasket?

Posted By: Les Kerf
Subject: CA No Manifold Gasket?
Date Posted: 13 Feb 2026 at 8:24am

In another thread I mentioned that my CA had no evidence of there ever having been a rear main oil seal in it, well, my Grandson pulled the manifold off to put a new one on and lo and behold, there was no manifold gasket whatsoever! just a film of blue RTV silicone. Yikes!

Two of the exhaust ports showed slight leakage but the intakes appeared to be sealed nicely. It ran well.

Replies:

Posted By: PaulB
Date Posted: 13 Feb 2026 at 8:38am

Back in the 70s I've knew racers and old time SuperStock pullers that used RTV for manifold gaskets. When I first heard about it, I thought: No that can't work, but it does. With the removal of asbestos from the manifold gaskets, I always use some Red RTV around the port holes. That is the only thing that I've found to make the new type manifold gaskets last more than a few years.

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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY

Posted By: Les Kerf
Date Posted: 13 Feb 2026 at 10:10am

Ford built literally millions of engines with no exhaust manifold gaskets, but this is the first time I have seen an engine with no gasket on the intake.