Exhaust Manifold Studs
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=149404
Printed Date: 19 Aug 2025 at 12:03pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Exhaust Manifold Studs
Posted By: jerbob
Subject: Exhaust Manifold Studs
Date Posted: 12 Apr 2018 at 2:34pm
Hello Everyone.
I had taken off both my muffler on my HD16 to repair and while I was at it, took off the exhaust manifold as well to clean and paid.
Muffler turned out great. While taking off the exhaust manifold, two studs snapped off however I was able to get them both out without damage to the heads.
in replacing the studs are they anything special? They are 1/2" and threaded on both ends of course. Do you need to place any Loctite on the ends going into the block or is that a no no?
BTW I found a small whole worn through on on of the ports but cleaned it up and JB welded it just fine. I found two adjustable bands around this one port and was hoping it was not holding the manifold together. Someone had used the two bands to hold a piece of high temp material over the whole to plug it up. Overall manifold is pretty solid to my relief.
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Replies:
Posted By: LeonR2013
Date Posted: 12 Apr 2018 at 9:33pm
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If it's been working I don't believe I'd try to fix It. You might take what you have and try to improve on it a bit. Sometimes these little fixes hold up quite well.
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Posted By: jerbob
Date Posted: 13 Apr 2018 at 6:27am
Agreed. Just cleaning, all new gaskets, and painting. Treating it gently as these manifolds are impossible to replace.
My son works with s prototype engineering company and are going to scan my manifold and see about milling a new one. Just looking into it but if they do it, might be something to offer this great group.
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