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Expansion tank has marks on it..warm the car with (archive)

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Posted by Doug on April 23, 2002 at 14:47:16:

In Reply to: where and how to check for low level? up top? posted by EricH on April 23, 2002 at 14:39:46:

the cap off of the expansion tank also, this will help beltch and trapped air you may have in the system - particularly if you have to top off the coolant. It's how you purge the system on M3s (no screw to do it, like other models). I've heard of people doing this while parked facing down hill so that the air works it's way to the highest point - your expansion tank opening. That's not completely necessary but also not a bad idea.HTH.

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