Engine ID please
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=164982
Printed Date: 10 Sep 2025 at 4:29am
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Topic: Engine ID please
Posted By: ac hunter
Subject: Engine ID please
Date Posted: 12 Oct 2019 at 7:37am
  Several years ago, maybe 10, I became the owner of a WD-45 with a replacement motor of some sort; a someday project. It must be higher displacement or higher compression than a stock motor since the 12 volt battery I use on the other WD-45 and WD won't turn it over. A bigger battery works OK. Motor spins freely with the starter when the plugs out. It ran fine when I got it but had a bigger battery. Someone previously cut the battery box to accommodate a larger battery. I don't think I have a ground problem. The left side of the block has "G7L" cast into it and the right side is marked "AM-3858-2" with a "3" beneath. Does anyone know if this tells what the motor is or know where I can find the information to find out? I think it may be about time to dig this tractor out of the shed and get it going again. Many Thanks for any help. Russell. Many thanks for any help.
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Replies:
Posted By: DaveKamp
Date Posted: 12 Oct 2019 at 9:55am
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Back up a couple feet, Russ, take another picture of it from each side, so we can see it's external features, head/valve cover, etc... ------------- Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest. |
Posted By: CTuckerNWIL
Date Posted: 12 Oct 2019 at 5:47pm
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While you're out there taking pictures from a ways back, look for the engine number It will be STAMPED on the block, not cast like these casting numbers. ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: ac hunter
Date Posted: 12 Oct 2019 at 8:31pm
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Thanks, I'll work on some more info tomorrow.
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Posted By: DrAllis
Date Posted: 12 Oct 2019 at 9:16pm
| Look directly behind the air cleaner to carburetor hose and you will see a serial number stamped on the block. It will be W-xxxxxx (WC/WD engine) or 45-xxxxxx (WD45 engine) or 17-xxxxxx ( a D-17 engine). |