Farm Equipment - Allis CA engine rebuild

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Allis CA engine rebuild

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=140728
Printed Date: 06 Jun 2025 at 11:23pm
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Topic: Allis CA engine rebuild

Posted By: carco21554
Subject: Allis CA engine rebuild
Date Posted: 23 Jul 2017 at 9:26pm

Question, Allis CA engine once upon a time had a rebuild kit "Power Pack", my Father installed but I can no longer mine his wealth of knowledge. This may/may not have been the proper terminology. This kit would increase Horsepower maybe 3-4 horse.
Does anyone know what was different in the kit??, liner/piston diameter or piston dish/flat top??? OR,,,,,
Is it possible to still obtain this kit??
I have a CA I am restoring, that has a leaking liner and a lightly scored liner.
Thanks for responses.

Replies:

Posted By: Gerald J.
Date Posted: 24 Jul 2017 at 10:37am

Could be taller pistons for higher compression ratio to use modern higher octane gasoline or thinner wall sleeves for a bigger cylinder bore.

I have a shop manual for G, B, C, and CA on line at: http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf" rel="nofollow - http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf

Gerald J.

Posted By: Dick L
Date Posted: 24 Jul 2017 at 11:22am

Most likely what is called an over bore kit. It takes it from 3 3/8" pistons to 3 7/16" pistons.

Posted By: Bill Long
Date Posted: 24 Jul 2017 at 3:59pm

I remember the original B tractor came out with a smaller bore engine - 116 Cu In to 125 Cu In. When we rebuilt them we always put in the larger motor kit - sleeves, rings, pistons, and wrist pins. Upped the horsepower a few. Customers always appreciated it.
I do not recall an oversize kit being made for the CA. However, some after market person could have, as Dick says, increased the bore or raised the cylinders a little to increase power
Good Luck!
Bill Long

Posted By: JimD
Date Posted: 25 Jul 2017 at 8:51am

http://oktractor.com/zen/index.php?main_page=product_info&cPath=1_2_43_58&products_id=158" rel="nofollow - http://oktractor.com/zen/index.php?main_page=product_info&cPath=1_2_43_58&products_id=158

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