Super mta engine id

[farmerjim72]

Few years ago got a super mta from a family friend. Pritty rough shapsheet metals good but t/a was out steering wobbled in 3 gear not even safe in 5. any way trying to get it to run well now compression is 50 55 75 60 was the same after adding oil in the cylinders. Figured cylinder head issue but looking at the block trying to figure out whats in it. I know it had a block put in it when they got it not sure if the year. It was done because it had a hole that was patched with tar and a shingle. But here are the picture of what I found on by it any help would be great. Above the oil filter 11-3-n and above the oil filter6943-dj and c-248

 

[used red MN]

The casting number 6943DJ and the C-248 tell you it is a regular M block. A Super M block would be a C-264, which is the stock cubic inch displacement. The 11-3-N tells you the block was cast in the 11th month of 1944. The Super MTA was built in 1954. The rest of your tractor should have Y or Z codes for 53 or 54. The previous YT post in the link gives you the info on the casting date codes.
Edit to add: To post photos they need to be added by using the ..Choose files.. button in the lower part of the post and reply areas.
Previous YT post


This post was edited by used red MN on 10/11/2021 at 10:36 pm.

 

[the tractor vet]

Well that is and M block the correct bloc k would be a C 264 and a C 264 can become a C 281 just by going to the 4 and 1/8th sleeves and pistons . I also have a S/Mta that i am the second owner of . Mine is updated to the C281 with the 4 and 1/8th M&W flat top pistons and will pull 60 Hp on the dyno . Many times you will find a super M / Mta with a 248 block in it and a 248 block can become a 264 engine by installing the thin wall sleeves and over sized pistons . Since at one point in time the Org. engine chucked a rod out the side of the block and the owner was running a weee bit tight on money so he went to a salvage yard and bought a M engine to put in it to keep on going . BUT if you want to be correct then ya need a C 264 block and what you do with that block is up to you . As the shy is the limit . My S/Mta runs well , BUT not as well as a close friends does as his has almost twice the horse power as mine . That tractor has been on the same farm since 1955 and god only knows how many hours are on that one as his grandfather use to be the big custom corn picker in two countys with that tractor even caught fire and burnt once under the picker and rebuilt . I rebuilt the engine some 20 years back on it and had to hunt for the pistons that were in it . I found a set in Indiana and made the trip of 650 miles round trip to make it like it was With those pistons .

 

[DeltaRed]

Early M through 450 used the same basic block.So not uncommon to see mismatched/incorrect motors in these tractors.A friend here has a 450 with an early M motor in it.I have n MD with a 400 gas motor in it.

 

[D Slater]

May need more info, 6943DJ casting was later than 1944. Also never found a block that old with C-248 on it. Could be a replacement block cast in 1967. If so the engine may not have a engine serial number or prefix letters to ID what it was used in when built, if from a power unit, crawler or W series. If it does have a serial number with prefix letters it would tell what it came out of. If casting number was 365586R1 you would be in luck. They were a replacement block cast later that could have C-248, C-264 and C-281 on them but all the same internal bore size as a C-264 or C281. They had hole for dipstick drilled, plug for hole if dipstick not used, mechanical fuel pump push rod hole drilled and a two bolt cover over the opening. The 6943DJ block is probably the same way.