Farm Equipment - 426 engine swap

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426 engine swap

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=210707
Printed Date: 12 Apr 2026 at 9:23am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 426 engine swap

Posted By: robesonfarms
Subject: 426 engine swap
Date Posted: 11 Apr 2026 at 12:36pm

Im looking at a 426 out of a L3 Gleaner combine. What needs to be done before I can put the motor into an 8030 allis? Torque specs? Thank you!

Replies:

Posted By: DrAllis
Date Posted: 11 Apr 2026 at 7:29pm

Flywheel, maybe the engine back plate, exhaust manifold and turbo and crossover tube, maybe the water pump and possibly the crankshaft pulley. Front engine mounts need to be fabricated. Throttle linkage depending on the age of the L-3 engine.

Posted By: robesonfarms
Date Posted: 11 Apr 2026 at 7:30pm

If I have the original motor still in the 8030 can I just use the original motor mounts to transfer over?

Posted By: DrAllis
Date Posted: 11 Apr 2026 at 7:36pm

That's up to you. A lot more work. The front end of the engine has to be stripped and camshaft removed to swap the front engine plate.

Posted By: Lynn Marshall
Date Posted: 11 Apr 2026 at 7:47pm

If you did that, I think that I would use the tractor oil pump and pan. Probably check on some crank bearings while there too. Maybe even use the tractor injection pump, if you have more faith in it.