Farm Equipment - Manifold Leak On B

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Manifold Leak On B

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=153388
Printed Date: 08 Sep 2025 at 10:29pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Manifold Leak On B

Posted By: George Davenport
Subject: Manifold Leak On B
Date Posted: 26 Aug 2018 at 7:22pm

How do I check for a manifold gasket intake leak on my B? I can not get it to idle smothly with the idle intake screw, and it runs rough a high speeds. The air cleaner-to-carb hose is not leaking. Thanks George

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Life is what happens while you are making plans for the future

Replies:

Posted By: Hubert (Ga)engine7
Date Posted: 26 Aug 2018 at 7:30pm

Spray some WD-40 around the manifold, if the intake part is leaking you should notice a change in rpm's. Carb cleaner or starting fluid will work also but are a lot more flammable.

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Just an old country boy saved by the grace of God.