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Old 11-11-2012, 05:47 PM
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First time First time is offline
Location: in my house
Join Date: May 2010
Posts: 537
Mein Auto: 2001 540i sport/1994 525i
Air in the coolant would explain the car overheating but it would not explain the sludge.

If the radiator is original, i would place a bet that the sludge is in their.
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