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Okay I'm new here and have a f250 2003 v10 I had the diver side head spring a leak and i put stop leak and fix the leak but made the temp go into safe mode.... I got it to my father inlaws shop and fix the Head and replace with new gaskets ,plugs , cin head senor ( no water senor on this truck) new radiator, belt,water pump, oil ,filter on so on. I have drove it a 150 miles and now the temp gauge will go up till the check gauge light comes on and go back down to normal running temp..the truck is not hot most I got out of temp gun was 209....
Disconnect the rear heater hose at the intake manifold, and fill the reservoir until the coolant flows out the back of the intake. That should take care of any air. Then keep the reservoir topped up as you idle it and let it come up to temp.
If this keeps happening, I'd check the sensor itself, especially if the coolant isn't really all that hot. Is the clutch fan working right?
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
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