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B engine cracks

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=25175
Printed Date: 25 Jul 2025 at 7:59am
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Topic: B engine cracks
Posted By: wbecker
Subject: B engine cracks
Date Posted: 03 Feb 2011 at 2:41pm
I have my IB torn down and see cracks between the cylinders. Should I scrap the block and look for a replacement, or should it be ok to use as it looks like the cracks would be sealed by the head gasket?
Opinions?
Bill B
 


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Allis B, IB, Low B, G, D10, JD M, 8KCAB, C152



Replies:
Posted By: DonDittmar
Date Posted: 03 Feb 2011 at 3:12pm
Run it. Head gasket will seal it off. 95% of the B blocks out there are cracked in the same place

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Experience is a fancy name for past mistakes. "Great moments are born from great opportunity"

1968 D15D,1962 D19D
Also 1965 Cub Loboy and 1958 JD 720 Diesel Pony Start


Posted By: David Gibson (OH)
Date Posted: 03 Feb 2011 at 3:15pm

Don hit the nail on the head. Most B's have those cracks.



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David Gibson
http://www.darkecountysteam.com" rel="nofollow - http://www.darkecountysteam.com
1956 WD45


Posted By: Don Smith
Date Posted: 03 Feb 2011 at 4:09pm
Never fear the crackes will not hurt anything. All my Bs have these cracks. Hope this helps.


Posted By: GlenninPA
Date Posted: 03 Feb 2011 at 8:11pm
Cracks at the top are fine.
 
Cracks at the bottom mean new block.



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