M52 crank and rods into M50?

[Phill172]

So i had a e36 touring, with a knackered M52 single vanos 2.8 engine, the car is being broken and im lumbered with a big ol lump of shite..

Also have a E30 touring which i have recently put a M50 2.5 non vanos into, now headgasket gone due to engine sitting with no antifreeze over the winter and it is blowing combustion into the coolant so i am getting huge huge airlocks.

The M50 being an early one, out of a 1990 E34 525, is a iron block (correct me if im wrong)

Anyhow, i have been told that you can put the M52 crank and rods/pistons?? into a M50 non vanos, therefore making my 2.5 a 2.8?

Im not sure on engine power gains or anything like that, but I am going to be fully rebuilding the engine so i may aswell chuck it in if it works and see what we come out with

So the three questions,

can it be done

what gains are there

would i use the 2.8 or 2.5 pistons?

Thanks
Phill

[Gunni]

The blocks are the same height so use crank, pistons and rods from the 2.8.

Gains, more bottom end and more high end.

[DanThe]

Use the M52 head/management for a better engine

[Phill172]

Fantastic, as regards to the compression....

The M50 non vanos 2.5 what is its cr and what is the cr of the M52 2.8 single vanos, nikasil i believe,

can the m50 pistons be used and would the increase, decrease or neither effect the cr??

Thanks!