Quote:
Originally Posted by wpoll
The M57 and M57N (M57TÜ) have a cast iron block. The M57N2 (M57TÜ2) etc. has an alloy block.
In terms of the E53 chassis, all the diesels were a cast iron block, since the M57TÜ2 wasn't used in an X5 until the E70 chassis (circa 2007).
And yeah - you DON'T want to accidentally put petrol (gasoline) into a diesel!!   |
M57 and M57N share the oil pan gasket, both have solenoid injectors rather than the piezo ones found in the later N2, and they are both single turbo. Both are cast iron block, of course.
M57N and M57N2 share the bellhousing bolt pattern, and coolant thermostat. The M57N2 in the USA, however, has a compound twin turbo setup (and some lower trims of it have a single turbo if I recall correctly). I think the M57N and N2 run the same injection pressure of 1600 BAR vs 1350 BAR in the non-TU M57.