Farm Equipment - WD Engine Rebuild

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WD Engine Rebuild

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=26285
Printed Date: 26 Feb 2025 at 8:56am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: WD Engine Rebuild

Posted By: Tim in MN
Subject: WD Engine Rebuild
Date Posted: 24 Feb 2011 at 10:39pm

I've read through all the manuals (factory) about rebuilding the 201. I would think that modern technology would have caught up with these things by now to get rid of the rod and main bearing shims. If nothing else, would it do any good to get the block line bored and resize the rods to get the correct bearing crush? With the combined knowledge on this site there should be a solution to this.

Thanks, Tim.

Replies:

Posted By: Wes (VA)
Date Posted: 25 Feb 2011 at 12:06am

There's nothin' wrong with getting some shim-stock and put the rods and mains back together that way...or you can have your machine shop resize the rods and main caps..for a fee of course! shimming takes a little more time, but it just about outweighs the cost of having all that machining done IMHO. Now if you're gonna turn some rpms..you might wanna go the first route? someone who builds higher hp engines will chime in soon.

Posted By: Matt (Jordan,MN)
Date Posted: 25 Feb 2011 at 12:59am

Every engine i rebuild i get it line bored. I rebuilt a WD engine years ago and had to by new shims becouse there wasn't the correct amount in the engine any more. The new shims costed about the same amount to get the block line bored and the rods honed out to get rid of the shims. I also tried to rebuild a WD45 engine with out line boreing the block but when you tightened up any main cap you couldn't turn the crank. I measured the main bearing bore and it was correct from top to bottom but side to side it was.005 smaller than spec. I took the block back to the machine shop and they said that happens when you run a engine with worn bearings for a long time. My personal opinion is get the block line bored and the rods rerounded and start putting it back together. matt

Posted By: KC-WD45
Date Posted: 25 Feb 2011 at 2:06pm

I might be wrong but I bought a new set of shims from agco for my 45 last winter and I don't remember them being expensive.

Posted By: SteveC(NS)
Date Posted: 25 Feb 2011 at 2:25pm

Tim why would you expect technology to be updating antiquity? We're lucky enough to have aftermarket people answer the oldtime requirements for these fine pieces of machinery. Would you expect GM to produce technological advancements for something like the Vega aluminum four with it's cast iron head?

Matt I'd be afraid to get any machining done by someone charging less than the shim packs for an AC engine. Sorta threatens the credibilty of the entire post.

Line boring and rod resizing is definitely the BEST way to go but Allis designed most of this stuff so a farmer could do repairs himself and get back to work without re-mortgaging the farm.

Just my 2 cents Cdn.