Pulling Forum

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516

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=207462
Printed Date: 18 Jul 2025 at 3:49pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 516

Posted By: Brock58
Subject: 516
Date Posted: 13 Jul 2025 at 8:58pm

Has anyone put a 516 in a d21 curious as to what all had to be done for it to fit

Replies:

Posted By: tbran
Date Posted: 15 Jul 2025 at 11:47am

The only contribution I can make is to state the rear main seal and wear sleeve seem to be common with the 426 .... that means flywheel issue is not unsurmountable.

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: DrAllis
Date Posted: 15 Jul 2025 at 5:47pm

I imagine Mark Gettinger has done one or more. For a puller, you'd have to have a steel flywheel made anyway, so that's easy. The starter to flywheel/ring gear dimension and then maybe rework the D-21 engine backplate to fit the 516 block would solve that issue, and the bolting up to the bell housing.

Posted By: DougG
Date Posted: 15 Jul 2025 at 6:45pm

Isnt the 516 alot heavier than a 426??

Posted By: DrAllis
Date Posted: 16 Jul 2025 at 7:17am

A basic 426 intercooled 220 HP engine weighs 1465 lbs. A basic 516 intercooled 270 HP engine weighs 2360 lbs. The 516 family engine (also made in a 4 cylinder 344 cube version) was a carry over from the Buda company days, probably a mid/late 1940's initial design. The 426 was an all new modern Allis-Chalmers design from the early 1960's (as also was the 301/200 family). It is a larger heavier engine design per cubic inches of displacement. If it compared to a 426 design for weight, it should be about 1800 lbs, not 2360 lbs. The 516's physical size and weight actually compares to a Cummins L-10 (600 cubes) or M-11 (660 cubes) which weigh 2100-2200 lbs.

Posted By: NEVER green
Date Posted: 16 Jul 2025 at 9:08am

Two from Ohio I believe is the correct state, they both have naughty names, do quite well.

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2-8050 1-7080 6080 D-19 modelE & A 7040 R50