Farm Equipment - CA Rebuild

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CA Rebuild - Got it Running

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=167040
Printed Date: 10 Sep 2025 at 5:38am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: CA Rebuild - Got it Running

Posted By: Dale (Stonelick)
Subject: CA Rebuild - Got it Running
Date Posted: 31 Dec 2019 at 3:07pm

Finally got the 1951 CA running today with help from a golfing buddy. Made adjustments to timing, rocker arm/push rod gap, and the carburetor main jet needle. It runs really good!

Does anyone know correct torque for the head and rocker arm bolts?

Happy New Year.

https://youtu.be/cBy30B0ZRY0" rel="nofollow - https://youtu.be/cBy30B0ZRY0

Replies:

Posted By: Gerald J.
Date Posted: 31 Dec 2019 at 4:09pm

Bolt torques should be in the shop manual:

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: Gary
Date Posted: 31 Dec 2019 at 7:24pm

You started the engine before torqueing the head to the proper spec.

Not a good idea.

Posted By: mdm1
Date Posted: 01 Jan 2020 at 1:59pm

60lbs on the head. Do a Google search for Allis B head torque specs. It should show the tightening order also. Not sure about the rocker arms. I think I just snugged mine up. Oh and after you run it for a bit retorque.

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Everything is impossible until someone does it! WD45-trip loader 1947 c w/woods belly mower, 1939 B, #3 sickle mower 1944 B, 2 1948 G's. Misc other equipment that my wife calls JUNK!

Posted By: Dale (Stonelick)
Date Posted: 01 Jan 2020 at 7:58pm

mdm1: Thanks for the information.

Posted By: SteveM C/IL
Date Posted: 01 Jan 2020 at 8:42pm

Generally you run it up to full temp then let cool overnight and retorque cold.

Posted By: Jim.ME
Date Posted: 01 Jan 2020 at 8:44pm

The spec for torque and a tightening sequence diagram are on page CA-24, top of the right column, in the manual Gerald J. posted.

Posted By: Dale (Stonelick)
Date Posted: 02 Jan 2020 at 7:28am

Jim.ME: Thanks. The manual from Gerald J. has more detailed information than the manual that came with my tractor.

Posted By: Sugarmaker
Date Posted: 02 Jan 2020 at 10:34am

Dale,

Awesome news! Thanks for the update!

We need pictures too!

Regards,

Chris

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D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.

Posted By: BrianC
Date Posted: 02 Jan 2020 at 12:40pm

Good to have a golfing buddy who knows engines! You should let him win a few rounds. How is the oil pressure? Check that oil is getting to the rocker arm assembly.

Posted By: Dale (Stonelick)
Date Posted: 02 Jan 2020 at 1:21pm

Sugarmaker: I had a You Tube video attached to original post.

BrianC: Oil pressure is good - now runs at 15 psi.

Posted By: Sugarmaker
Date Posted: 02 Jan 2020 at 2:30pm

Dale,

Ok Went back and looked at the video! I am still learning about posting videos. Good job getting the tractor running. Yes torque that head. Not sure what was causing the smoke? Oil pressure sounds like good number.

Regards,

Chris

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D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.

Posted By: Bill Long
Date Posted: 02 Jan 2020 at 3:52pm

GREAT!!! Always good for me to hear the B-C-CA engine run. They are so dependable.

You might consider running the engine till hot. Let cool. Readjust the valve clearances. We always did that.

As to the valve cover - and this is back in the day - 50's - we thoroughly cleaned the valve cover gasket area, cover and attachment area. Put it upside down in a vice, attached the

gasket - we used shellac - I know there is better now, placed several heavy tools on the gasket to hold it in position, let sit for a while - 30 min. Then attached to head.

Always had to be careful since there is a large span area.

Engine sounds so good. Cannot tell you the memories it brings back. Especially after an overhaul.

Good Luck!

Bill Long