If I overheat at idle after a couple of minutes but cool back down when moving, which do guys think it could be, waterpump or thermostat? How could I test either one?

I just replaced the fan and fan clutch for the third freakin time and am desperate to try something else to see if it will stop the overheating. Truck didn't overheat before i decided to change the old and somewhat leaky fan clutch (which was probably engaged all the time).

thanks,

shawn

 

is the water boiling, getting warm, or what? if it is boiling, stop driving it, head damage will occur...

 

i would try a thermostat first to test it u have to boil it in some water to
what ever temp it is if it opens its fine

 

jsut htought of something else... there are ways to test the thermostat... or jsut replace it, they are cheap..... my truck didnt have a thermostat when i got it... ran cool until summer..... then it started getting hot...... from the research i did... it was becasue the water was actually flowing through the system so fast because there was no thermostat, that it wasnt in the radiator long enough to cool down

 

bump cause I need some serious help!

 

touch the bottem hose when the motor is hot and see if the hose is cold if it is then the tstat is crap.had the same problem ended up being the tstat

 

It might be the thermostat or water pump. The thermostat is easy enough to replace. It could be neither. Your radiator may be partially clogged. Just thought I would throw that in.