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  #1  
Old 08-16-2011, 04:23 AM
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M62TUB44 540/740 vs X5

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.

Last edited by makatech; 08-16-2011 at 06:19 AM.
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  #2  
Old 08-16-2011, 08:47 AM
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I'm a firm believer quality is determined by design.

Any tech guru could shine some lights?


Quote:
Originally Posted by makatech View Post
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.
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  #3  
Old 08-16-2011, 06:15 PM
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No inside info here, just guesses.

The X5 separator is mounted more remotely, from the parts drawing. That puts it further from the primary source of heat (the block), and adds in more remote lines (which can freeze). I don't see any link to fuel efficiency in terms of the design. I would put it down to packaging. What is in the physical space occupied by the oil separator on the 540, on the equivalent model X5?
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  #4  
Old 08-19-2011, 03:43 AM
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Yeah... well, the crankcase-ventilation/oil separator construction in E53 X5 with the 4.4L V8 (up to 2004?) is very vulnerable for cold climate, simply an extremely poor design, almost controversial.

Did BMW offer any goodwill solutions for this in NA? In Sweden they did not and many owners are extremely irritated. Problem engine number 1 is M54 but I don't think the construction in m62tub44 for E53 X5 is any better. (Many more BMWs with M54 in Sweden, that's why). I had a 530iA 2001 with M54 which froze but seem to be lucky now with an engine which not suffer from this weakness.
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Old 08-19-2011, 05:56 PM
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There were goodwill resolutions in North America during the warranty period (4 years), but remember that BMW also covered maintenance for that period. They didn't clarify whether it was warranty or required maintenance, but they ended up paying for the heating and improved separator and hoses (not that those resolved all of the problems). CPO vehicles got some relief as well, under the extended warranty.
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  #6  
Old 01-18-2013, 01:57 AM
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ill shed some light on this old subject from 8 or so years ago if some one is searching in future.

the 740 540 is a car, and well cars generally do not go up and down steep hills.

the x5 was designed to go off road, so the main drain for the oil seperator is at rear of engine (so when nose is pointed up ward, it will still drain) since the oil drain is almost straight down the back of the motor for the crank case system it really doesnt matter if the x5 is nose up or nose down it will drain straight down into oil pan.

now the car is another story, when the cyclone valve gets oil in it and seperates it the oil must flow down a tube from back of intake to front of crank case and then drain into front timing chain area. so if that model was driving up a grade, it would not drain very will now would it. going down a hill would be better.

this is from bmw training engineers when I went through STEP class and kinda sort of makes sence to me now after working on them for 10 plus years.
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Old 01-18-2013, 12:16 PM
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