Changed upper rad hose, No heat and Overheating - Ford Powerstroke Diesel Forum
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Old 02-12-2013, 04:38 PM
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Changed upper rad hose, No heat and Overheating

Hey guys, I just replaced the upper rad hose on my engine. While I was at it I flushed the old coolant and topped up with new. Problem is that I now have no heat in the cab, and my truck is over heating. Can the thermostat be stuck closed? Never herd of A thermostat sticking closed but it seems resonable.
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Old 02-12-2013, 04:45 PM
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You might have air lock?
And I guess it could have stuck closed.
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Old 02-12-2013, 05:44 PM
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My guess is air.
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Old 02-13-2013, 12:09 AM
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Air in the system would be my first guess too. Although thermostats fail from time to time too.

Did you run it for a while with the cap off to let all of the air out?
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Old 02-13-2013, 04:25 AM
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how many gallons did you put back in it? i think mine held 7.5-8 when i flushed. probably air
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Old 02-13-2013, 06:05 PM
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they can stick closed or open, this happened to me on my old nissan pickup.
the cooling system capacity is 8 gallons. 4 gallons of coolant, 4 gallons distilled water or maybe a little more coolant if thats what you want.
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Old 02-13-2013, 06:07 PM
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This is what i did to mine. Run it around for like 20 mins shut off take off upper hose from stat then take a long screw diver and push the stat down to help release the air. fixed mine. Might not be the most correct way but got the job done
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