Ok now that it is getting hotter outside (70-80s) at idle I am overheating. Not leaking, new coolant, 50/50 just seems after awhile of idling (not too long) I seem to go past normal and enter between normal and hot. Never made it to hot but getting close...I have a trans-cooler and a oil-cooler. I was wondering if I get like a $80 flex-a-lite fan at like Pecker Boys will it really help. I do not wanna spend TOO much on a fan just somthing to keep me close to normal.

 

I had an '85 F-150 that always ran at the Hot temp on the factory gauge. I had a new water pump, and coolant and thermostat and I just didn't believe the gauge. I replaced it with an aftermarket heat gauge and guess what, it wasn't running hot. Maybe you want to try that. Or a good radiator flush wouldn't hurt.

 

if you just replaced the coolant it could be an air bubble in the system which can cause the temp sender to read the temp of the metal around it and not the coolant.

 

Have you had anyone perform diagnostics on it?

 

Ok from what I know myself it doesn't seem like any air in the system. It has been completely flushed and re-filled properly. Another thing I should say that it NEVER made it close to above normal in colder temps. It just basically read between cold and normal at idle. Now with summer coming it goes to normal then if I let it sit for another 5-10mins it will increase. I thought it might be because of the restricted heat flow cause of the trans-cooler and oil-cooler covering the front of the radiator. I figured a fan would help keep it cool?..

 

Your stock fan should take care of that even with the other coolers and I personally do not think a electric fan is going to make any differance since it is absically going to be doing the same thing your stock fan does. It sounds to me like you either have a faulty gauge or a problem in the cooling system somewhere, thermostat maybe a restriction somewhere. sound to me though like the thermostat is not opening up all the weay when was the last time you had it replaced with a truck of that age that is the first thing I would check and /or replace.

Richard D.

WHILE YOUR HERE CHECK OUT MY GALLERY:
https://www.f150online.com/galleries....cfm?gnum=2479

 

The thermostat was replaced 12-4-01 (have it's receipt).

 

BTW don't mind my name I'm talking about my Bronco II.

 

Still could be bad I have had brand new ones fail after only 100 miles.

Richard D.

 

Yea it's easy to do, I'll pick up a stat and gasket at pecker boys and do it this weekend and see.

 

I had a similiar problem in my old 93 F-150. Changed all the usual stuff thermostat, fan clutch etc. Turned out a couple of blades had let loose in the water pump so it was not pushing enough water to cool the engine. So I'd say look at that water pump if you've done everything else. BTW my old pump was not leaking through the weep hole and did not have play in the shaft so visually it looked fine until I removed it and saw the inside of it.

 

Did you flush your radiator real good. If it is original or an old one it may be crusted and crudded up inside. Rad shops can flush it.

 

Has new water pump . Radiator is in excellant shape, probably was replaced not too long ago...