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Old 03-22-2012, 12:47 PM
chrisn7 chrisn7 is offline
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Location: Huddersfield, West Yorks
 
Join Date: Oct 2011
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Mein Auto: 750iL
Quote:
Originally Posted by joyism5 View Post
http://www.bimmerfest.com/forums/sho...818&highlight=

There are a several pictures how I did it without a mess.
As far as the tools, I used an infrared thermometer ($25-$40) and read from the cooling lines not the pan.
Oil pan should be open only at 50 C degrees ! It is stated on the pan.
When you reach like 60 C degrees and you are still filling, you need to stop. Then is the time when it will overflow regarding the fluid level in it. Let it cool and start again. Even after you get the right level at 50 C degrees , drive the car several miles and recheck again. You will need to add again if you check the level at 50 C degrees.
Sorry but this is wrong. If you reached a temp of 60, it would be overflowing anyway, there would be no question of getting any more in.

If the temp reaches 50 you have to stop and let the box cool down, which takes a long time. The point here is that if the fluid has been topped off at 50C, then it will reduce in volume as it cools, such that at start up in low temps there will be insufficent fluid, hence the whirring that is reported.

The correct way is to start from cold, and fill box until it overflows, then start the engine and quickly resume filling, until it is just overflowing again, and keep this process going until the temp reaches 30C. Then replace the drain plug. This way there will always be sufficient fluid. During the fill process, the gear lever should be in manual and moved through the gears, pausing a few seconds in each, to purge any air.

Its no good checking the level when the box is cold either, as oil should most certainly run out. Instead it should be run up to 30C, then checked with the engine running, when it should be just trickling out as above.

Whirring has also been found to be caused by some non OEM filters which lack some internal bracing allowing collapse and consequent noise.

Last edited by chrisn7; 03-22-2012 at 12:49 PM.
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