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Old 11-14-2010, 05:46 PM
dvsgene dvsgene is offline
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Join Date: Sep 2002
Posts: 2,614
Mein Auto: 98 540i M62 3.15
Have you checked the connection of the coolant level sensor at the bottom of the expansion tank?

As far as a leak, have you ever replaced the heater hoses in the back by the CCV? These tend to develop pinhole leaks and given the location is hard to see unless you look for it carefully.
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