Thread: Radiator advice
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Old 01-03-2013, 04:30 PM   #6
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Join Date: Aug 2011
Location: Reading, Pennsylvania
Posts: 814
My Ride: 03 325xi, 01 325xi
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Believe you stated that you replaced the coolant tank and hoses. As silly as this seems, are you 100% sure that you seated both parts of the upper radiator hose completely to the new tank? Did you replace the tank mount at same time you replaced the tank (usually a good idea to replace both as a unit)? Recently I used a JL coolant tank for replacement and it had a hairline crack in it where the smaller hose (overflow) of the upper radiator hose went on. Had to replace the tank again (tank was under warranty), but I opted to pay the few dollars more to use a BMW original tank, no problem after doing that. Also make sure you seated all hoses correctly, you can use some light grease or dishwashing detergent and water as a lube on the plastic fittings to help push them on all the way without hurting anything.
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