M62TUB44 540/740 vs X5

[makatech]

Hi,

I believe that E53 X5 used the M62TUB44 engine between 1999-2003?

I have a 540 2003 with M62TUB44 and I have questions about differences between these two engine installations/setups.

Since I live in Sweden frozen crankcase ventilation is always a concern for BMW owners in Sweden (at least for some engines/years), extremely annoying.

In Sweden I have hardly ever read about frozen crankcase in 540/740 with the M62TUB44 engine but I have read about several cases for E53 X5 with the same engine!

I had no problems with my 540 last winter in Sweden which was very, very tough.

I have now understood that there are differences in the Crankcase-Ventilation/oil separator constructions between the M62TUB44 engine in 540/740 versus M62TUB44 in E53 X5.

X5 M62:
Crankcase-Ventilation/oil separator BMW X5 E53, X5 4.4i (M62)

540/740 M62:
Crankcase-Ventilation/oil separator BMW 5' E39, 540i (M62)

I'm very curious about this. Why did BMW implement a different Crankcase-Ventilation/oil separator in E53 X5 which seem to perform poorly in cold weather?? What kind of differences are we talking about? Anyone who knows the "strange" story behind this? Perhaps a desperate solution to improve milage on the X5?

Maybe you guys have heard of 540/740 owners with problems too? One thing is for sure: In Sweden problems with frozen crankcase/oil seperator is much more common in the E53 X5 versus 540/740.