I have a 1992 Ford F150 nite stepside, with the 302 5-litre engine. The
engine keeps wanting to over heat. Replaced water pump, upper and lower
hoses, thermostat and had the dealer mechanics check the system. They can't
figure it out. They can not find a blockage in the radiator but thats not
saying much. By now you ask what are the symptoms? Well, let me tell ya..
First time noticed the truck overheat was on a short..less then 10 miles
trip on highway and off never faster then 65 mph. When got home noticed
gage just at the high mark. Shortly after turning off truck radiator fluid
overflowed out of the resevoir. Since then I am able to keep the temp by
the 'm' on the temp gauge. Also, checked the fluid and no indication of a
blown gasket, no leaks ect... the dealer even checked the fluid for a blown
head gasket. Not sure what to do from here.