Farm Equipment - WC and WD/WD45 engine differences

Print Page | Close Window

WC and WD/WD45 engine differences

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=24847
Printed Date: 24 Feb 2025 at 9:26am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: WC and WD/WD45 engine differences

Posted By: ChuckLuedtkeSEWI
Subject: WC and WD/WD45 engine differences
Date Posted: 28 Jan 2011 at 9:55pm

Alot of talk on here lately about the differences between a WC/WD engine and a WD45 engine, not only from 4" to 4.5" stroke, but also other things as far as manifolds, air cleaners, heads, plate on engine block, etc.

I thought this would be a good thing to discuss to see all the differences between the engine and what parts are interchangable and what aren't. It would be good information for me as I am contemplating what to do for a pulling engine for a WC and what I want to do with it. I already have a 45 block with what I think are WC internals in it(replacement block), but I was thinking of selling it as a running engine and starting over with some other things I have. Got a WC block here all ready to go. Also have a line on a 45 engine that is stuck, so will have to be torn down. Picked up a D17 carb, and also have a D17 manifold here off of a series 4 that I could use.

So can you put 45 engine internals into a WC/WD block to make things look stock, or are there differences in block heights etc. that won't allow that to work. Also, I know there were changes between the 3" and 4" heads, but were any changes along the line significant enough that a different head would help things. When and where did the heads open up or was that well into the D17's or later.

-------------
1955 WD45 diesel 203322 was my dad's tractor, 1966 D15 23530, 1961 HD3 Crawler 1918, 1966 D17 IV 83495, 1937 WC 41255, 1962 D19 6221

Replies:

Posted By: Steve M C/IL
Date Posted: 29 Jan 2011 at 12:00am

The 45 crank and pistons fit in WD's and I'm sure WC's too.45 and up rods are precision not shimmed so handier to work with.Think the tall head showed up late 53 on last WD's same with the synchro-mesh trans.Tall head probably better but ML pankey will have to say what about that.My guess is you wouldn't know the difference in the field on a stock engine.