Quote:
Originally Posted by goldguilexx
No, when the flush was done green came out and green went in. I'm pretty sure it was prestone and I used prestone universal coolent to fill the tank when I had leaks from bleeding. Think it may have made a difference?
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Non-BMW coolant (or aftermarket equivalent) can definitely cause problems. Prestone or most "green" coolants are not phosphate free and can cause corrosion and/or precipitation problems in BMW cooling systems. I would suggest inspecting the radiator for clogged cooling tubes.