Make sure you do not have a cracked head(s).
Have flushed complete cooling system replaced water pump radiator thermostat clutch fan added 2gal straight anti freeze then filled to capacity with water and truck is still over heating. What else could possibly be wrong
Low coolant, stuck thermostat, failed water pump, plugged radiator, failed fan clutch, failed headgasket, etc.Low coolant, stuck thermostat, failed water pump, plugged radiator, failed fan clutch, failed headgasket, etc.
Check the thermostat or the radiator. The thermostat could be sticking or the radiator could be plugged.
Coolant level? Cooling or clutch fan? Water pump circulating? System airbound? Hoses collapsing under pressure? Defective thermostat not opening? Defective radiator cap - not building pressure? Radiator plugged or restricted?
Cooling fan could be faulty or radiator could be clogged or have slight leaks in it .
below radiator hose at the thermostat
Probably at the engine end of the upper radiator hose
first of all, do you have the right thermostat? ie: winter, summer. if so i would get the radiator checked, it may be getting pluged.
Under the housing where the upper radiator hose hooks to the engine.
Follow the upper radiator hose from the radiator to the engine. The thermostat will be located behind the thermostat housing at engine end of upper radiator hose. Drain some coolant into a clean container. Remove upper radiator hose from thermostat housing. Remove the 3 bolts that hold the thermostat housing to engine. Remove thermostat housing. Remove thermostat. Be sure to install the new thermostat facing in the same direction as the old one was.
Follow the upper radiator hose from the radiator to the engine. The thermostat will be located behind the thermostat housing at engine end of upper radiator hose. Drain some coolant into a clean container. Remove upper radiator hose from thermostat housing. Remove the 3 bolts that hold the thermostat housing to engine. Remove thermostat housing. Remove thermostat. Be sure to install the new thermostat facing in the same direction as the old one was.
If your truck is overheating!!! Then check the upper radiator and lower radiator hose's , if the lower is cooler the the upper the either the thermostat is not opening or the radiator is clogged