Garden Tractors - boring out engine block

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boring out engine block

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Garden Tractors
Forum Description: A great place to discuss the Simplicity and Allis Chalmers Garden Models
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=87030
Printed Date: 22 Nov 2024 at 7:02pm
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Topic: boring out engine block

Posted By: Tractor
Subject: boring out engine block
Date Posted: 25 Mar 2014 at 8:55pm

i want to get the engine bored out on my allis chalmers b-12 engine since they don't make the oversized pistons for it any more and i was wondering if anyone else had there engine bored out and what measurements i would need to send it to a machine shop to bore it out to a 14hp?

Replies:

Posted By: dawntreader74
Date Posted: 25 Mar 2014 at 10:12pm

all you haft to do is tell the shop man what you want an he should know what piston size you need to get 14 horse or more. he can order you a rod an the right piston an head gasket'' good luck. hope it works good.

Posted By: Tractor
Date Posted: 26 Mar 2014 at 8:19am

Any idea of how much it would cost?

Posted By: dawntreader74
Date Posted: 26 Mar 2014 at 11:58pm

call around an check on a new piston an rod with rings cost ask the shop man what hes got to have to bore 1 hole an add it up an you should be close to cost a little larger piston cant be but a few bucks more if any

Posted By: ACmowerguy
Date Posted: 27 Mar 2014 at 6:13pm

Machining prices and parts prices vary widely. Do you want to use B&S parts or aftermarket? My local guy gets $30 to bore a 1 cyl, $35 to turn a single cyl crankshaft, $25 to do the valves and lap them int, $10 to surface the head, while some large shops might not want to even touch a job like this. Since your taking so much more out of the bore in this case, there may be additional cost.

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10 various B-series garden tractors, AC Homesteader8, 416 hydro,710 gt, 914, 916H, 917H, 920D, and many misc attachments