Cracked Blocks on Wet sleeve engines
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=149299
Printed Date: 27 Jun 2025 at 6:56pm
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Topic: Cracked Blocks on Wet sleeve engines
Posted By: 51ACWD
Subject: Cracked Blocks on Wet sleeve engines
Date Posted: 08 Apr 2018 at 7:32pm
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Been doing a bit of looking and asking and I don't know if I've come to an answer yet. I know that many Allis'out there have had a cracked block behind the carburetor. I'm wanting to make sure this crack (which was fixed sometime in the past) did not go into a water jacket. Do wet sleeve blocks posess water jackets on the sides of the blocks or just around the cylinder liner?
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Replies:
Posted By: MACK
Date Posted: 08 Apr 2018 at 7:43pm
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If you are talking 201 or 226, if it is cracked behind carburetor, it into water Janet. MACK
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Posted By: SteveM C/IL
Date Posted: 08 Apr 2018 at 8:57pm
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Unless it's just above the pan rail from a rod,any crack you find is in a water jacket
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Posted By: WF owner
Date Posted: 08 Apr 2018 at 9:06pm
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...and most of the cracks were caused by having water in them instead of antifreeze. When it got cold, they froze (the water expanded as it turned to ice) and cracked.
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Posted By: 51ACWD
Date Posted: 09 Apr 2018 at 8:57am
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The engine in question is the 318UM from a 1936 U. That's kind of what I thought. I was just trying to understand more of a wet sleeve vs a dry sleeve engine. As long as the cylinders are sealed around the top and bottom seals, and the crack sealed, I should be okay?
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Posted By: HoughMade
Date Posted: 09 Apr 2018 at 8:59am
Assuming the crack in the block is repaired well enough to hold the pressure of a cooling system at full operating temp, the block crack should not affect the combustion chamber.
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1951 B
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Posted By: 51ACWD
Date Posted: 09 Apr 2018 at 9:03am
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That makes me feel even more better. It's a non pressurized system.
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