it is hard to say without seeing the vehicle but check the coolant. make sure its not contaminated. (it should be nice bright green) if you replace the spark plugs make sure you replace them with plugs with the right heat range. also listen to the way your transmission is shifting make sure that is not slipping.
pluged cooling fins in and on the radiador
If your Ford Aerostar is overheating and losing water, it may be a bad radiator. You need to take your car in to get serviced.
If it is not losing coolant I would expect a plugged radiator.
have the head gasket replaced
Heater core may be air bound and have to be bled Heater core may be plugged or restricted Thermostat may not be opening allowing coolant flow to core
Assuming that the vehicle is not losing coolant, start with a radiator cap, pressure could be escaping through the cap. If the car has electric fans, verify that they come on when the vehicle reaches operating temperature. Also a faulty water pump could be a culprit.
When a Hyundai is losing compression in its engine the car will not run properly. Symptoms of low compression are misfires, stalls, and overheating.
have you checked ur thermoswitch or the relay Simply check if the fan units are running when the engine is hot. Easiest to do when the hood is up. Are you losing coolant from the expansion tank, this could be a sign of failed Head Gasket.
cost i can not tell you, but this I can...it could be 1 of 4 things...(or all of them) # radiator fluid is low or not there at all # lack of water for the radiator # your radiator has a leak and you are losing fluids # you may need a new thermostat
happened to me .when car was stationery no leak ,but when driving the water pump opens and you lose water .so you dont see the problem unless the car is moving.had to replace thermostat housing.
first , the thermostat could be stuck. try replacing it. if your radiator OS losing coolant, there may be a leak in the radiator causing it to overheat, or the water pump could be bad. thermostat is the likely cause if it is not losing water.
3 weeks ago you found the upper radiator hose almost completely squeezed in on itself so you replaced the thermostat and upper hose!Also, the cooling system has been flushed and refilled and the cap has been replaced! Could be a partially plugged radiator. Flushing will not always take care of this. I would check the thermostat in a pot of water and thermometer prior to install. I have installed faulty new thermostats. Fool me once shame on you, fool me twice shame on me. thermostat in upside down ? spring should be in the block dying fuel pump