g3mustang

So driving under these hot summer days i've noticed that cruising on the highway is making my temp creep. I have 2row radiator a ford contour fan 180 t-stat

The faster I go the higher the temp goes at 60mph I'm at 205. I know this isn't really that hot but if I were to go faster it would creep more.
As soon as I stop at a light the temp starts to drop. The car can idle all day at 185 even if I rev it.

Water pump??? Any ideas thanks

Bubba 95SN

Radiator lower air deflector still there? Raise engine speed and watch lower radiator hose. Does it collapse?(spring in hose gone)

g3mustang

I have a radiator deflector. I did replace the lower hose awhile ago but I don't remember if there is a spring! What does the spring do or what does it mean if the hose does collapse

g3mustang

Also like I said I can rev it at stand still all day and temp never creeps up

g3mustang

today i will be able to check my lower radiator hose. can this be done at any temp level or does the t-stat have to be open

mattdel

Plugged radiator is my best guess. Possible fan clutch issue too. Your symptoms are exactly backwards of a bad WP.

g3mustang

Brand new radiator and I have an electric fan off a ford contour

mattdel

It's possible that the fan isnt up to the job of cooling at high RPM. Do you have it hooked to the low speed or high speed?

g3mustang

On high speed the contour fan moves more air then a touras fan and it dual

mattdel

Yeah? Perfect condition motor, sure. Have you checked to see that your fan motors spin @ the designed RPM?

Have you taken your T-stat out and tested it in water on the stove, to make sure it opens completely, and quickly, at 180*?

You're assuming that all these parts you put in are working 100%. Any one of them working at 50% will cause your issue.

Think about it. You described your problem as a "slow overheat while on the throttle, perfect temp while idling".
This shows that something in the system is not working up to par, and it will take diag of each piece to figure out whats going on. You are creating less heat while idling, thus the system can keep up. While driving, the system slowly loses its effectiveness, and you gradually overheat.

Slow thermostat, plugged radiator/heater core, collapsed hose, slow fans... the list goes on. Even a bad coolant mixture can cause this. Too much antifreeze, not enough water.