Farmall 450

Larry James · Dec 4, 2011

Recently I purchased a farmall 450 which I know does not have the original engine. Is there someone out there who could help me identify the engine from the following information.
Casting Codes : C248 (probably an M engine) Additonal numbers are : 6722DJ, 1-17-C. Also included a stenciled number, 3645, on the machined area. Thank You in advance for any help you can give me.

MikeinKy · Dec 4, 2011

I'm no expert, but it appears to be a M engine. If it is the correct engine it will have 281 cast on it.

FC Andy · Dec 4, 2011

The C248 on the machined part is the dead giveaway. Serial # points to being a '39 M block. 1-17-C is a casting date code, Apparantly January 17, 1939. I thought '39 was letter A, though. I don't have a book in front of me at the moment.

Anonymous-0 · Dec 4, 2011

The Farmall 450 should have a 281 in it. The 248 is a M engine. If you want to put back to a 281 and can't find a 281 block you can put 281 sleeves and pistons in a 264 block.

CNKS · Dec 4, 2011

Something is wrong with the numbers, C is either 1957 or 1933. Serial is definitely 1939.

Larry James · Dec 4, 2011

Thanks for the replies, I guess for now it will stay in. The engine runs excellent with 70 lbs oil pressue when warmed up. No oil leaks or strange noises. I think the engine has been gone through because it has all new gaskets throughout, head, oil pan, valve cover and side cover. This spring I will take it to County Line Implement N of Oconto, Wi. to have it put on the dyno to find out the hp. Just doesn't sound right to have a 39 m engine in a 450. thanks again for the information. Larry

D Slater · Dec 4, 2011

6722DJ is the casting # for a M block, but original M blocks didn't have the size on them.
I suspect its a replacement block from IH. Does it have a small plate behind the carburetor on the engine block? IH done some strange things with some replacement blocks so there's some possibility the bore could be 281 size. Maybe the 3645 was the original engine # that someone added back on. What is the tractor serial #?
Also don't know how long after M production ended that C248 engines were used for other aplications. Have saw replacement blocks with C248 dated to after the middle sixties.
If 1 17 C is the date code, cast in 57.

Larry James · Dec 4, 2011

Tractor serial number is 4289 S, with ps, torque amplifer, 3 hydraulic valves,and straight drawbar. Will post pictures soon, tractors being restored. Thanks Larry

D Slater · Dec 4, 2011

Engine # stenciled in is in the range to match a original engine # for that serial # tractor.
Strange, engine looks just like a late model M block except for the C248 on the side. After more thinking I can't remember seeing a 6722DJ block with a C date code before. Most that late have 6943 or a 6 digit cast #. Interesting

mkirsch · Dec 5, 2011

If the C were really an O, would that make more sense?

O code would be 1945, right?

Of course it could be a replacement block cast in 1957. It could have 450 internals.

D Slater · Dec 5, 2011

Tried to think of another date that would fit, trouble is in 45 the block casting # suffix wasn't up to DJ. Anything can happen but have only saw blocks with with C248 cast on the block dated after M production ended. Do have some information they used C248 blocks after that with another serial # system but don't know what the block casting # was on them.

Larry James · Dec 5, 2011

I did some more checking on the casting numbers, and the numbers I gave seem correct. Looking down from the top of the engine on the manifold side there is a cast no. that reads 1-29-C on the head if that helps. Thanks Larry

Farmall 450

Larry James

New User

MikeinKy

Well-known Member

FC Andy

Member

Anonymous-0

Well-known Member

CNKS

Well-known Member

Larry James

New User

D Slater

Well-known Member

Larry James

New User

D Slater

Well-known Member

mkirsch

Well-known Member

D Slater

Well-known Member

Larry James

New User

Similar threads