block repair
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=8263
Printed Date: 30 Oct 2025 at 7:13pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: block repair
Posted By: powertech84
Subject: block repair
Date Posted: 17 Feb 2010 at 11:14pm
| The engine block i took out of my wc Is cracked in between all the cylinders. Three seperate cracks. I know blocks can be welded, but can this be done without affecting how the sleeves fit, or is this block junk? I'm not exactly sure which block i have, because alot of the parts i know aren't original. It has m&w 4 1/8 cratered pistons, and a a wd45 crank. The carb that was on the engine is a marvel that is of the model from a 45 or d17. The block has the plate covering the right side by the lifters. Three rods had castle nuts and cotter keys, and one had the other style that looks like a castle nut but isn't. Kinda thinking this thing is a hybrid. So, back to my original question, what should i do with this block? |
Replies:
Posted By: Gary in Texas
Date Posted: 18 Feb 2010 at 5:10am
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If the cracks are at the top of the block, don't worrie. The head gasket will seal that area.
If the cracks are at the bottom of the sleeves you have a problem. Don't know of anyone tha will repair that area.
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Posted By: Dick L
Date Posted: 18 Feb 2010 at 5:11am
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Hair line cracks on any wet sleeve engine are common. This is cause from running them out of water not freezing. Wide uneven cracks between the cylinders might be from freezing and can be pulled back together without welding. Welding this areas is not necessary as the head gasket will seal the cracks the same as it seals around the sleeves. Having to change rod bolts in an overhaul would not be a problem. When you have a bad bolt it needs to be changed. That would be a WC block that has been played with. |
Posted By: powertech84
Date Posted: 19 Feb 2010 at 5:50pm
Thought i'd update with some pics. one of the tree cracks is noticably higher on one side than the other. The bottom looks good.
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Posted By: Dick L
Date Posted: 19 Feb 2010 at 7:41pm
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If it were mine in that case I would install a tie bolt. It being a WC block you would drill behind the side plate rather than remove a core plug as in my pictures. The bolt will draw the crack back to where it looks like a hair line crack. It is doubtful it would leak if you just rebuilt the engine and did nothing to the crack. So easy and quick to drill a hole thru the block from one side to the other and tap the out side and tighten the bolt to pull it back and know that it will not be a problem. http://public.fotki.com/DickL/tie_bolt_story/ - http://public.fotki.com/DickL/tie_bolt_story/ |
Posted By: powertech84
Date Posted: 20 Feb 2010 at 1:24pm
| Thanks for the tip, i might give it a try. Sure do figure i'll be quite nervous while drilling though. Seems like one of those things where you only get one shot, or you just made yourself a nice boat anchor. |