Farm Equipment - AC WD45 ENGINE BORE SIZE

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AC WD45 ENGINE BORE SIZE

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=25109
Printed Date: 24 Feb 2025 at 7:04pm
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Topic: AC WD45 ENGINE BORE SIZE

Posted By: Brian in WI
Subject: AC WD45 ENGINE BORE SIZE
Date Posted: 02 Feb 2011 at 4:26pm

I have wd45 with a 4" bore dome piston in it. It is a 1956 model. Did 45's come with 4.125 bore? I also have a LP block with letters GH on end of # stamped in block. This one also is only a 4" bore with a high comp. piston in it. So can someone answer my question. Did someone put these in the motors or did they come that way.

Replies:

Posted By: Dans 7080
Date Posted: 02 Feb 2011 at 4:33pm

A WD45 came with 4" bore stock, there were kits to make them 4-1/8".

Posted By: Lonn
Date Posted: 02 Feb 2011 at 4:55pm

They came with a 4" dished piston.

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Posted By: Lester
Date Posted: 02 Feb 2011 at 5:25pm

The LP45s came with WD pistons for the 7.2 comp. I put them in my 45 years ago with the overbore. I believe they are the dis low compression pistons. I do not think any WD pistions were dished.