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Old 11-19-2012, 11:41 AM   #7
Registered User
Join Date: Mar 2005
Location: Dallas, TX
Posts: 707
My Ride: Titanium Silver 330i
Orange coolant is definitely not the right coolant that is DEXCOOL made for GM cooling systems. Flush out the entire system as soon as yo can and get a gallon of genuine BMW coolant from the dealer, it's about $25 so it's not terribly expensive and that's enough to do the whole system when diluted at 50% with distiller water. Make sure to use distiller water or you'll get mineral deposits in your system.
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