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My pump just failed yesterday the morning of the 4th, luckily not too far from home. 03/07 build 335i coupe MT, 92k
I spent all day doing this repair, finally put everything back together. Next step is to fill coolant and bleed. I'm unclear about a few with bleeding, and I keep finding contradictory information; It's my first time performing a coolant flush.
all questions for N54 only:
1.Do you leave the bleed screw open when initiating the pump to self-bleed, or should it remain closed during this procedure?
2.Should the bleed screw be opened or closed when pouring in new coolant?
3. Is the self-bleeding procedure sufficient to remove all the air from the system? Should it be done more then once?
4. is it a good idea to also try and bleed manually by opening the the bleed screw, after initiating and completing the water pump self-bleed procedure?
As you can probably tell, i'm paranoid about air pockets potentially causing much damage. Thanks.
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