Farm Equipment - Allis 175 diesel perkins 248

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Allis 175 diesel perkins 248

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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=186946
Printed Date: 04 May 2025 at 2:39am
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Topic: Allis 175 diesel perkins 248

Posted By: Josh(NE)
Subject: Allis 175 diesel perkins 248
Date Posted: 10 Mar 2022 at 6:25pm

I bought a 175 that had been torn down with the Perkins 248 engine, it needs an overhaul before reassembly. Originally this engine had a straight wall sleeve with no counterbore cut in the deck of the block. My understanding is straight sleeves are available but another machinist has told me to cut counterbores in the deck and use the updated sleeve. What are your thoughts on this any recommendations of a machine shop? Thank you

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Allis Express
'65 190XT, 37 B, '72 170, '83 8030, and the IH 560 was a mistake

Replies:

Posted By: DrAllis
Date Posted: 10 Mar 2022 at 6:41pm

I've never overhauled one of those. I was unaware of the two different sleeves. I'm a tight-wad and would question if it was good enough for the last 40 years, why does the design need to be changed now? I know of many parent bore blocks (Ford/ New Holland) that get bored oversize and then a thin repair sleeve pressed into the block. The machine shop leaves a step at the very bottom to keep the sleeve from ever moving downwards. Someone else who has done some of these will hopefully lend some advice.

Posted By: Josh(NE)
Date Posted: 10 Mar 2022 at 7:08pm

I understand what you are saying but the reason for the failure is the thin sleeve above the deck of the block fractured off. After counterbores are cut in a new style sleeve is installed there's a lot more mass for the fire damn

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Allis Express
'65 190XT, 37 B, '72 170, '83 8030, and the IH 560 was a mistake

Posted By: Kevin in WA
Date Posted: 10 Mar 2022 at 10:05pm

I'm sure it is rare, but I have heard of the old style Perkins sleeve without the flange settling in the block. Most of those Perkins 236 and 248's ran forever with a little care.

Posted By: DrAllis
Date Posted: 10 Mar 2022 at 10:11pm

Any chance a failure like these is due to constant overheating ??

Posted By: soggybottomboy
Date Posted: 10 Mar 2022 at 10:36pm

My 175 had the top part of the sleeve broken on one cylinder. It was the very top part that protruded up above the block and into the head gasket. The newer style sleeves have more thickness in the top area. A machine shop here worked on the block so they would fit. I have put about 2500 hours on it since that time, and so far so good. Oh, also, it takes a different style head gasket with that change.

Posted By: Calvin Schmidt
Date Posted: 12 Mar 2022 at 10:03am

This may not be important here. There are two types of Perkins engines. Ag and Industrial.

I've been told that there is little parts interchangeability. A-C uses the Industrial version. MF uses the Ag version. Ag has front mounts- Ind has side mounts. Have a 175 with the 248 and a 715B TLB with a 236 and several JCB Perkins 236 powered telahandlers

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Nothing is impossible if it is properly financed

Posted By: DougG
Date Posted: 12 Mar 2022 at 10:58am

Sounds like a good place for an Allis 433 out of a 6060

Posted By: tbran
Date Posted: 12 Mar 2022 at 11:32am

We have done several. The sleeves for the industrial block 248 236 are NOT finished and have to be honed after installation to fit the pistons correct clearance . This is a more precise fit as sleeves can distort on installation. I have heard of counter boring the block and using the MF style sleeve kit - but never experienced it - it would have to be a lot less $ and machine work for me to go this way. (Doing a little research - the 236 seems to be a better engine per comments - didn't know that either)

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: JC-WI
Date Posted: 12 Mar 2022 at 1:05pm

A fellow had a 175 that had a problem of massive amount of antifreeze come out the exhaust and water in the oil. We took the head off and there was a hole into the water jacket through the thin liner... found no casting of the block inside the water jacket so somebody had it apart before and just put that thin liner back in without any other attempt to re-enforce it. He sold the tractor to some one else and they took the engine out and had the block bored for a thick sleeve and rebuilt the engine. Last I heard it was still going.

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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."