Has the fan shroud been altered or is it missing? It helps funnel the air thru the radiator to cool the engine. The fan may have been switched out with an incorrect one at some point, leaving a gap at the shroud which isn't allowing proper air flow.
Chech the fan.by open the throttle and see if fan speed up.some is thermo control control
SOURCE: 1966 Ford Mustang overheating
try to run the water pump without hoses, and add water in the 'in' side, if is powers out the other side, then it's fine. how is your water/coolant mix?
SOURCE: Engine overheating at high rpms
check the casting on your replacement water pump..4.0l engines require a reverse rotating water pump..may be causing your problem.
SOURCE: why is my 2005 jeep wrangler overheating while
If this vehicle has a clutch type fan it is probably the problem, good at idle but once the rpm's speed up it does not keep up with engine speed, thats why it heats up at highway speed.
Difficult to diagnose because you cant always tell if it is spinning as fast as it is supposed to be.
I’m happy to assist further over the phone at https://www.6ya.com/expert/gregg_78ecbb34e27be215
SOURCE: over heating,
You may have air in the system. Let the engine run with the radiator cap off until the thermostat opens. Have someone then get in the truck and bring the rpm up to 1800 to 2000 rpm and hold it there for 15 to 20 seconds while you top off the system with coolant and put the radiator cap tightly back on. Then bring the rpm down to idle and road test the truck. DO NOT BRING THE RPM BACK DOWN TO IDLE UNTIL THE RADIATOR CAP HAS BEEN INSTALLED COMPLETELY. I suggest replacing the radiator cap at this time also.
175 views
Usually answered in minutes!
×