cooling
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Freshman User
Joined: Mar 2009
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cooling
i am working on my cooling system now so i dont freeze to death like i did last winter. it is an 88f250 with a 302. it has a new water pump,heater core and changed the thermostat twice,190degrees. it also has a new alum radiator put in by the previus owner.even in this 100degree texas heat the needle will only go to barely to the n mark on the gage and when the tstat opens it will drop.i also flushed the system.the clutch fan spins freely by hand but runs all the time.could that be the problem?? also the truck will eventually run warm but i have to drive about 45 miles inorder to get warm.
Hotshot
Joined: Sep 2001
Posts: 11,958
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Mine is about the same as yours with all fairly new parts. Its almost always been like this. Even in the summer on 100 degree days with the AC on it is on the N or the O on the gauge. Usually it runs on the N when warmed up.
When its freezing out side it does take my truck 15 minutes or more to actually warm up all the way.
I think the OEM heater core put out more heat than the replacement does.
When its freezing out side it does take my truck 15 minutes or more to actually warm up all the way.
I think the OEM heater core put out more heat than the replacement does.
Hotshot
Joined: Sep 2001
Posts: 11,958
Likes: 228
I replaced my fan clutch a couple years ago.
I belive there are 2 choices. I do know that everyone has recommded a thermal one. I think thats the right terminology for it.
Its supposed to free wheel at highway speeds. I know that it still turns the fan even when its freezing outside at idle, so I'm not really sure what thermal actually means as far as the fan clutch goes.
Do you have a new one?
Next time you start your truck when the engine is cold open the hood and see, I bet the fan is running and moving air.
I belive there are 2 choices. I do know that everyone has recommded a thermal one. I think thats the right terminology for it.
Its supposed to free wheel at highway speeds. I know that it still turns the fan even when its freezing outside at idle, so I'm not really sure what thermal actually means as far as the fan clutch goes.
Do you have a new one?
Next time you start your truck when the engine is cold open the hood and see, I bet the fan is running and moving air.
Senior User
Joined: Nov 2008
Posts: 139
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From: okc,oklahoma
if you spin your fan and it spins freely then the clutch is bad. a good clutch will barely let the fan turn when you spin it by hand.
how the work is when the engine reaches a certain temp and heats the clutch it goes to moving lots of air. ( will sound like a semi taking off from a stop inside the cab)
how the work is when the engine reaches a certain temp and heats the clutch it goes to moving lots of air. ( will sound like a semi taking off from a stop inside the cab)
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Tuned
Joined: Mar 2009
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From: Ohio
a trick i found with my ranger was to get a piece of corrugated plastic(it's like cardboard but made of plastic so it doesnt get soggy) and zip tie it to block air flow through the grille. My 20 minute drive to school used to be beyond freezing bc Ohio winters are quite cold, but after the plastic my truck was warm after about 5 minutes.
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