losing coolant from the overflow bottle on a 2011 f150


Asked by luis2u Dec 07, 2012 at 07:30 AM about the 2011 Ford F-150 XLT SuperCab

Question type: Maintenance & Repair

I keep losing coolant, there dosen't seem to a over heating problem, it blows coolant out of the cap

3 Answers

Tom Demyan

If coolant is blowing out of the cap, you have an overheating problem. Check your thermostat to see that it is working properly.


If you are building up air in the radiator, your truck could have a bad head gasket or crack in the head.


So do a simple check first. Like an old fashion radiator cap, the cap on the plastic refill container needs to be turned until an audible click is heard. Pressure needs to build up in the system to increase the boiling point of the coolant. Since the truck is so new, the idea of a blown headgasket or defective thermostat or fan clutch seems to be remote, although possible.

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