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Cleaning out the coolant expansion tank. 1993

posted by  Jim Holst on  Wed May 21 03:07 CST 2003
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last visit: Tue Jan 4 11:05 CST 2011
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While the "new" car is waiting for parts, I thought I'd clean out the coolant expansion tank so I could actually see the coolant level. The tank has that greenish deposit around the inside. So far I've tried: water, dish detergent, CLR acid calcium/rust remover, acetone, and a brief sritz with carb cleaner. Nothing has removed the deposit except a bottle brush and my finger. The tank (from a 940) has a complicated internal structure which has me baffled (pun intended). Has anyone found a way to clean out these deposits?






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