Farm Equipment - D15 Engine Trouble

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D15 Engine Trouble

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=191342
Printed Date: 21 Aug 2025 at 11:30am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D15 Engine Trouble

Posted By: modirt
Subject: D15 Engine Trouble
Date Posted: 18 Oct 2022 at 2:17pm

What has become of the AGCO parts book? I can't seem to find it.

Looks like I may be needing an engine connecting rod for the D15 (160 engine).

Can those be ordered as singles or a set?

Replies:

Posted By: modirt
Date Posted: 18 Oct 2022 at 3:16pm

OK, found it, and does look like can be ordered as a single.

Next question is can you replace just one or should you do all 4 to match?

Posted By: steve(ill)
Date Posted: 18 Oct 2022 at 4:35pm

You can replace just 1 connecting rod... Make sure all 4 pistons match in design.

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

Posted By: modirt
Date Posted: 18 Oct 2022 at 4:51pm

Not sure how it happened, but issue is a month or so back, after doing some light tillage work, engine first had change in sound....running ok, but sounded funny, and a few minutes later, very loud "clacking" from engine. Killed it immediately, and it then locked up. Started pulling stuff apart, and when head was removed, found a bent exhaust valve on top of piston. Apparently the retainer had let go and it dropped in. No apparent damage to the piston or sleeve.......but rod is suspect. Probably safest to replace it. No apparent damage to crankshaft. Rod bearing was heavily scored, and will need to be replaced.

Anything else we need to worry about? Other than finding good gaskets to put it all back together with. Did an overhaul in 2021......finished in time to work hay in 2021. No problems or issues since, except several of the gaskets that came with overhaul kit failed. Head gasket leaked right off (replaced it with a vintage Fel-Pro), valve cover gasket and gasket over the governor all leaked pretty bad. Ran good, but leaked a lot of oil, which I detest.

Metal in Reliance overhaul kits seems to be OK, but gaskets are all suspect.

Posted By: DrAllis
Date Posted: 18 Oct 2022 at 5:09pm

No damage to the piston or sleeve?? I'll bet I'd be reusing that connecting rod. It's fine.

Posted By: Albert
Date Posted: 18 Oct 2022 at 8:00pm

I have some used 160 parts in NW MO if you find some you need,

Albert

Posted By: Albert
Date Posted: 18 Oct 2022 at 8:07pm

Try this link

parts.agcocorp.com

Posted By: MACK
Date Posted: 18 Oct 2022 at 8:22pm

What kind of sealer did you use on gaskets?

I'm with Dr. rod is tougher than valve and piston. MACK

Posted By: AC720Man
Date Posted: 18 Oct 2022 at 8:52pm

We used some copper spray on our head gasket a year and half ago. Perma gasket products on gaskets. No leaks. We did a complete out of frame rebuild due to the sump coming off the oil pump. Had varying oil pressure, that’s the reason we tore into it. Installed new oil pump. Cylinder 4 had scaring in the sleeve, we took no chances and did a full rebuild. Maybe overkill, but it was dad’s first new tractor so we gave it a brand new heart including having the crank and cam checked. Reliance rebuild kit including gasket set. Was pleased with the quality of the kit.

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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD

Posted By: AC720Man
Date Posted: 19 Oct 2022 at 7:29pm

Also had the head checked and had a complete head job done. Did you you have the head checked and decked?

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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD