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Macon Rounds 
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Joined: 18 Feb 2010
Location: Pittsburgh Pa
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 Topic: Perkins 248 engine "WANTED"
Posted: 28 Feb 2024 at 9:50am |
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Perkins 248 engine "WANTED"
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The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate
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WF owner
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Joined: 12 May 2013
Location: Bombay NY
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Posted: 29 Feb 2024 at 6:49am |
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IIRC, the 248 comes in different blocks and they are not interchangeable.
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Macon Rounds
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Posted: 29 Feb 2024 at 7:43am |
Thanks for the info . I need one for an Allis Chalmers 175 tractor. Is there a designation on the block. Here is ID on mine. 
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The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate
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Macon Rounds
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Location: Pittsburgh Pa
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Posted: 29 Feb 2024 at 7:59am |
Let's see ????? Should I reply to this guy ?????? Joined January of 2024. No points. Location UK. Just another scam Grrrrr ! 
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The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate
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Codger
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Posted: 29 Feb 2024 at 8:15am |
What WF is referring to is a "Stress Block", and conventional block engines. They are not interchangeable at all. The "Stress Block" does not have a bolt on rear flywheel housing and the these are used a lot where the tractor engine is part of the structure of the tractor meaning no frame rails.
On the left side of the engine there should be an aluminum tag riveted to the block. Many 4.248 engines were stamped "LG" build. If the tag is missing, there should be stampings into the block above the injection pump just below the cylinder head deck, or same place at the rear.
There is also a different crankshaft layout. One has a single large bolt, the other a three bolt affair retaining the front pulley(s). There are also differences internally but need to know what you have before going much further.
A 4.236 will be a slip fit also if the same basic block.
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A career built on repairing and improving engineering design deficiencies, shortcomings, and failures over 50 years now.
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Macon Rounds
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Location: Pittsburgh Pa
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Posted: 29 Feb 2024 at 9:16am |
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Thanks for the info.
I'll be checking for those specific details.
Thanks !!!!!!
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The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate
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WF owner
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Posted: 29 Feb 2024 at 8:03pm |
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I'm trying to remember what DrAllis said, but I think he said that the AC 175 used a different block than the Massey Ferguson 165/175/180.
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Codger
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Posted: 01 Mar 2024 at 7:11am |
I have a friend with a Massey 175 and it uses a stress block 4.236 engine. I've never seen a 175 diesel Allis myself so cannot vouch, nor deny culpability in that application.
Keep in mind those engines were produced in gasoline variants also; though I've not seen a 4.248 with anything but diesel myself.
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A career built on repairing and improving engineering design deficiencies, shortcomings, and failures over 50 years now.
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