M50 engine block identification, Please help!

[Jparkr]

I got a free M50 block complete with pistons,crank,rods, etc. I am trying to identify it between M50nv and an M50tu. The code is:

35750481
25 6S 2


So the engine code may tell me if its a TU or not right?

I know the 3 = M50 (in this case) 575 = production # 0 = Munich plant

but the 481 is supposed to be the production date... I cant figure out how to tell the date built yet... so no help with that code until I can figure out the production date. Do any of you know?

The other code.
25 = 2.5L
6 = # of cylinders
S = ????
2 = ????


Can anyone help me please.

[dranttna]

this is what bmw says
25=2.5L
6=6 cyl
s=4 valve technology
digit 5= differentiation idex
digit 6-7=variant numbers
digit 8= i.d. (a=reman n=new engine)

[dranttna]

the top number you posted doesn't mean anything. if you write it in the format its on the block (should be three lines stacked) i might be able to help you out.

[gregslow318i]

does it have a big 2.5l casted in the side of the block?