treeska

My gt over heated the other day on the high way and I don't know why. I checked the fluids and they are fine. I changed the thrumostat and no difference. It takes about 40mins for it to reach hot. It seems to climb gradually weather I'm on the highway or around town. I definately gets hot faster around town. I'm guessing because there is not as much wind cooling the car. I clean all the leaves and such away from the raditator no change. Whats next? The car only has 48,000 original miles and runs great the oil level is fine. Help me pleases I want to drive the car.

mustangsneverdie

do you still have the stock fan on it

mjr46

it may have a partially restricted radiator

86 5.0L

this, if its overheating on the highway

treeska

It has the stock fan on it. It over heats on the highway and around town but it may take 30min or so to do it it climbs up slowly but hits the H sooner or later

cch

The stock rads. tend to gum up. Considering their age..it's a given. Just take a look inside sometime, be a whole bunch of booger-looking **** in there. Anyhow it'll restrict flow and cause your problem.

mustangsneverdie

check to see how easy the fan turns

treeska

the fan spins easy with my hand
I can see some stuff at the ends of the radiator when I take off the cap and look inside it is white

mustangsneverdie

just flush your rad out by the sound of it, it needs it but if that doesn't fix it then you may need a clutch fan

86 5.0L

a fan is taken out of the equation on the highway...