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Vele 10-06-2012 10:50 AM

Loosing coolant.
I own a 2001 325i. It looses antifreeze frequently, basically adding a bit more every 2-3 days. I know there is a blue bleed screw under the car driver side close to radiator. Can this be a gasket issue or something else. Like fixing things my self just need tips. The leak seems to be close to that bleed screw...

GoForthFast 10-06-2012 10:37 PM

Very probably your expansion tank.
Plan to replace it and maybe do a cooling system overhaul if due.
Leak there can be hard to see.

ventsyv 10-08-2012 09:27 AM

I would start by checking the upper radiator hoses for cracks. Then look for signs of coolant - when the coolant evaporates, it leaves a white residue.
The expansion tank is usually a prime suspect.

I posted a similar thread a couple of days ago, in my case it turned out it was the expansion tank. Very sneaky little leak. Search for the thread if you want.

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