Well all was well with my trukk but now its over heating. The heat coming out of the vents is not always hot it is sometimes snt the thermostat because The top radiator hose is hot so that is telling me the stat open as normal. The water pump weep hole is not leaking, and the bearingsare good on the pump. There is a good amount of coolant in the system so I am stumped. someone suggested the clutch fan was not working but the drag is as normal as always. I was think of flushing the system even though it doesnt need it but I would like some new advice if anyone can help.

2000 4x4
4.3 V6

 

intake gasket?? Mine would say its overheating in like...5 minutes when that happened to mine. Are you burning any antifreeze?

 

double check the pump. it dosn't have to leak for it to not work. the bearings could be bad and it still won't work. also check the heater hoses to see if they're both hot. it's also possible that the heater core could be plugged up and the anti freeze isn't circulating.

 

I have the same problem and changed the radiator cap and thermostat the hoses stay cool and it stopped blowing out hot air. HELP need my ride back. If its the water pump is it easy to change how much should it cost in the shop.