Ok, Ive been running circles for the last month. I bought a 79' F250. Shorty after it began to run hot. I changed the
thermostat(high flow) & the
antifreeze. Still hot
Changed the fan clutch. Ran ok for a couple days then hot, again.
Changed the water pump. semi ok for a couple days & getting hot again.
I'm beginning to think its the fan clutch, for the following reason. I can hear the fan pulling hard, at startup. as the truck warms is mellows out. I run on the highway & it now runs a little warm. When I pull off the highway I can't hear the fan pulling anymore & its getting warm.
When I changed the pump last week, it had sat for a couple weeks. the motor would get warm, then cool itself back down. Now, that isn't happening, again.
The obvious questions...
I am not losing coolant.
No coolant in
oil or from exhaust.
No remanufactured parts. Pump & fan clutch were new replacements(heavy duty).
The new coolant looked clean when removed from the system.
I have the big radiator & it looks super clean
the water pump has a new backing plate.
So, questions.
What are the chances one would get a new fan clutch that is defective?
& is there anything I'm maybe not thinking of?
Fan Clutch issues. 460BB
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