Farm Equipment - Do 125ci sleeves fit in a 116ci B motor?

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Do 125ci sleeves fit in a 116ci B motor?

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Category: Allis Chalmers
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=23886
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Topic: Do 125ci sleeves fit in a 116ci B motor?

Posted By: JR Maley
Subject: Do 125ci sleeves fit in a 116ci B motor?
Date Posted: 11 Jan 2011 at 3:50pm

Do 125ci sleeves fit in a 116ci B motor? What is needed to go to 125 or larger in a hand crank start B? I would like to keep the compression ration around the same for easy starting.

-JR

Replies:

Posted By: tbran
Date Posted: 11 Jan 2011 at 5:04pm

gee, all b's except the early Wakeshau B's had 125 CI engines 3 3/8" bore 3.5" stroke

right?

Posted By: RichinWis
Date Posted: 11 Jan 2011 at 5:23pm

The early ones had a 115 CI engine then the 125

Posted By: TMiller/NC
Date Posted: 11 Jan 2011 at 5:28pm

The BE engines were 116 cu. in. with 3 1/4" bore. Tim

Posted By: steve(ill)
Date Posted: 11 Jan 2011 at 5:37pm

the original BE was a 3-1/4 inch bore. Later the same block was fitted with bigger ID sleeves to get 3-3/8 inc bore. Same rods, valves, crank, block... they all have interchangable parts. Most aftermarket kits are now 3-7/16 bore and will go into the BE or the CE block. Compression is probalby 6 or 6.5 to 1 on most kits.

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Like them all, but love the "B"s.

Posted By: JIminArkansas
Date Posted: 11 Jan 2011 at 7:26pm

When did the 3-7/16" overbore kit come out for use? I have an old B from a fence row find and it has the larger overbore pistons in it. It was stuck but a little gasoline in each hole and a match and it was free. Took longer to take the head off than to get it unstuck.

Posted By: Chalmersbob
Date Posted: 11 Jan 2011 at 9:34pm

All you need are the sleeves, pistons and "O" rings.

Nothing major to do. Bob

Posted By: steve(ill)
Date Posted: 11 Jan 2011 at 10:01pm

Thats a good question Jim. I always thought it had something to do with Allis going out of buisness and most aftermarket parts being made overseas after that.. I dont have a clue to the answer, but will guess mid 1980s.

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Like them all, but love the "B"s.

Posted By: TedBuiskerN.IL.
Date Posted: 11 Jan 2011 at 11:25pm

I have a 1957 Tractor Supply Blue book that shows the 3 7/16 overbore kit for the B, C, CA, and RC. That was about the time the power race started.

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