Farm Equipment - Cracked B block

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Cracked B block

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=166792
Printed Date: 10 Oct 2025 at 6:31am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Cracked B block

Posted By: Creek Jenkins
Subject: Cracked B block
Date Posted: 19 Dec 2019 at 8:38pm

Friend of mine has a B with a crack in the block between the cylinders. Is this repairable? Or should he be looking for a new block?
Cheers
Creek

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Have spacesuit, will travel

Replies:

Posted By: steve(ill)
Date Posted: 19 Dec 2019 at 8:46pm

Small cracks are not a problem.. If it is bigger than 1/16 inch, Dick L had a procedure several years ago to remove the freeze plugs on the side of the block, cross drill holes between the liners, and pull the block back together.... maybe he will post a link.

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Like them all, but love the "B"s.

Posted By: DiyDave
Date Posted: 19 Dec 2019 at 8:51pm

[TUBE]Pq0wfU4ZaKk[/TUBE]

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Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need!

Posted By: Gerald J.
Date Posted: 19 Dec 2019 at 9:00pm

Nevada Cylinder Head at Nevada Iowa welds and straightens the bores of broken blocks.

Gerald J.

Posted By: Dick L
Date Posted: 20 Dec 2019 at 5:35am

Hair line crakes between cylinders are normal in wet sleeved engines when they have been over heated. They do not cause a problem. The head gasket seals them just the same as the crack that runs 360º around the out side of all wet sleeves.

If you have a crack wider than a hair crack it can be pulled back with a tie bolt. Tie bolts were used early in manufacturing some wet sleeved engines to prevent cracking. It was used to repair these engines by dealerships in the 40's and most likely earlier. I picked it up from an old tractor mechanic and took pictures to pass it on to DIY ers using simple tools most have or can obtain inexpensive easily.

https://public.fotki.com/DickL/tie_bolt_story/" rel="nofollow - https://public.fotki.com/DickL/tie_bolt_story/

Posted By: jaybmiller
Date Posted: 20 Dec 2019 at 6:18am

WOW, them old guys KNEW how to do neat stuff !!!

New use for bacon grese too !!

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: Sugarmaker
Date Posted: 20 Dec 2019 at 6:54am

Those pictures are great documentation!

Regards,

Chris

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D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.

Posted By: Lon(MN)
Date Posted: 20 Dec 2019 at 7:13am

If you care to replace, I have some blocks without cracks for sale.

Posted By: Creek Jenkins
Date Posted: 20 Dec 2019 at 8:21am

Thanks for your input, I will pass it on to him. I thought I remembered that the crack between the cylinders was fairly common in the D17 diesels, but didn't know if it applied to the smaller gas stuff too.
Lon I will let him know you have a block in case he wants to go that route.
cheers,
Creek

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Have spacesuit, will travel