Overheating

After you replaced the thermostat, there is a possibility you had an air bubble in the system. After you fill the radiator and run the engine for a bit, the air will circulate out, but the coolant level will be low, which would cause an overheating problem.

In degrees F, how hot is it getting? Does the radiator fan turn on?

It sounds like you may need a thermostat. I would start with that. Get a thermostat and gasket and replace it and see what it does and we will take it from there. If you need help with how to do this please just ask.

If the fan is belt driven, it will run with engine running. Just for testing, remove the thermostat, hook everything back up. With radiator cap removed, can you see coolant? If so, start the engine, can you see coolant flow? The flow should instant, without the thermostat. If no flow, check the water pump.

Maybe the radiator needs to be flushed? Does it run any cooler without the thermostat?

Oil pressure is good?

Do you mean turn off the Air Conditioner?
Do you have an electric radiator cooling fan?

Check to see if the cooling fan turns 'on' when the A/C is on -- and check if it turns off when the A/C is turned off.I am assumeing it does.

Your engine cools itself by absorbing heat into the engine coolant and dissapating it to the outside. It does this by pumping coolant through the radiator and the heat is blown off by the cooling fan (as it blows air over the fins of the radiator).

The cooling fan is a VERY important item when it comes to cooling your engine. It is turned on two different ways -- #1. When the A/C control is turned on the fan should automaticaly turn on - thus cooling the coolant that is being pumped through the radiator which cools the engine.
#2. The cooling fan is also controled by the coolant temperature sensor (or sensors). When the coolant reaches a certain temperature, the coolant temperature sensor - switches the cooling fan relay - which turns on the cooling fan. Number 2 is probably where your problem is. Check the cooling fan relay. If it is good, then replace the coolant temperature sensor (CTS). Be sure to replace the sensor that controls the cooling fan -- there is another sensor that sends a signal to the temperature gauge. This sensor has nothing to do with the cooling fan control circuit.

So is it overheating as far as the gauge reads?Have you tested your radaitor cap?If its not holding the correct pressure it will boil over the cap and that can cause it to overheat from the coolant loss.

Did you check the fan(s)? You have a clutch fan that is run by the belt. Try moving the fan from side to side if there is any play then the fan clutch needs to be replaced. If all it tight spin the fan, Then warm up the vehicle, spin fan again, did it spin the same? If so replace fan clutch.

Now some also have an eletric fan. If it does then start vehicle and turn A/C. Does the fan come on?

Post responses here in forum.

OK, there is you problem. The fan cold should spin but with some tightness. The fan warm or hot should be tighter than cold. The way it works is it has a reastat that as it heats up it tightens to draw more air throught through the Radiator for better cooling.

Replace the Fan Clutch

Check coolant level, then oil does it look normal?
If coolant low refill and alow engine to run for sometime to remove any traped air.
Let me know what you find
Thanks for Donate