Overheating temp
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Overheating temp
Hello All, any help here is greatly appreciated. 2012 - F250 - 6.7 - 105,000 k. Last week heat was intermittently working, 2 days later no heat and temp gauge maxing out. Changed thermostat, checked fan, drained, flushed, and replaced coolant, also there has been no noise warning of water pump, I know that doesn't rule it out. Weird overheating since no overheating at idle and temp will drop back down while driving if I don't accelerate. Reading I have seen water pump - heater coil - etc. etc.. Just trying to get some feedback prior to shelling out $$$ to diagnosis.
Thanks in advance!
Thanks in advance!
Hotshot
Joined: Jul 2013
Posts: 14,298
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Get a guage to measure the coolant tank
Take a measurement at idle
Take a measurement at 2000 rpm
If the tank pressure is the same, you may have a water pump problem
If the pressure at 2000 rpm is over 20lb psi, possible cooling system containment problem*. Early 6.7,s had a pax side head problem due to cracks in the pax side head*. This was fixedin the Gen 2 engine released 2015
Take a measurement at idle
Take a measurement at 2000 rpm
If the tank pressure is the same, you may have a water pump problem
If the pressure at 2000 rpm is over 20lb psi, possible cooling system containment problem*. Early 6.7,s had a pax side head problem due to cracks in the pax side head*. This was fixedin the Gen 2 engine released 2015
Cargo Master
Joined: Feb 2015
Posts: 2,338
Likes: 255
From: Livermore Ca.
Hello All, any help here is greatly appreciated. 2012 - F250 - 6.7 - 105,000 k. Last week heat was intermittently working, 2 days later no heat and temp gauge maxing out. Changed thermostat, checked fan, drained, flushed, and replaced coolant, also there has been no noise warning of water pump, I know that doesn't rule it out. Weird overheating since no overheating at idle and temp will drop back down while driving if I don't accelerate. Reading I have seen water pump - heater coil - etc. etc.. Just trying to get some feedback prior to shelling out $$$ to diagnosis.
Thanks in advance!
Thanks in advance!
First how do you know the truck was over heating? The computer will put you in limp mode if it gets too hot.
Next you may have a heater problem. Maybe a blend door is not working. Did you have heat in the defrosters? If your blend door is stuck it may be in the defrosters. Usually a heater will stop blowing heat for 2 reasons. the first is stated above nesx one is no water in the truck. If the truck doesn't have water first sign is no heat because there is no water in the heater coil. There may be a valve in the heater hoses that turns on the water while running the heater but I don't think that is the case anymore because you can set the temp to 60 to 80 in the truck. I have seen vacuum modules go bad before.
I would not think you needed a water pump thermostat or a coolant change. With all the money you spent so far the dealer would have fixed your truck by now. Not to rip you but you should have come here first. Lots of people here to help you.
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aharleycpl
1987 - 1996 F150 & Larger F-Series Trucks
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Dec 31, 2015 10:35 AM
