How to change thermostat on 4.2 engine on 98

The top radiator hose where it connects to the engine is where the thermostat is. Take off the hose and the 2 bolts on the housing to get to the thermostat.

I'm not sure the thermostat is the problem. If the thermostat was stuck open the engine would not warm up and also not overheat.
If its stuck closed, the engine would warm up as well as the heater, then continue to the point of overheating.
If the cooling system is low on liquid coolant, or the water pump is not working, the coolant will not flow thru the heater and the sensor may not know to turn the fans on.

It is under the cover that the top radiator hoseches to on the engine.

make sure the water pump is actually pumping.. could also be just a bad temp sensor

i would say to check your water pump then if dosent work i would say you have to do you head gasket i had that problem before but my problem was on a honda civic so its was easier but good luck

The only engine available in a 98 Lincoln is the 4.6L 281 cid fuel injected V8 with dual overhead cams.

This engines oil capacity is 6 quarts.

Ford Motor Company recommends SAE 5W-20 Motorcraft oil.

Have you burped the system? If air gets trapped it can prevent the thermostat from opening and make your engine overheat. To get the air out, start with a cold engine, turn the heat on vent or floor only and run full blast, run the engine with the radiator cap off until it gets to operating temperature. Keep an eye on the coolant level and add as needed until it doesn't drop in level for five minutes. Some cars may require removal of the thermostat so you can drill a small hole in it to allow air to escape from the engine side of the thermostat. Keep any eye on the temperature gauge to make sure you don't over heat it while trying to burp it.

All you should have to do on the older cars is follow the upper hose from the radiator to the engine. The housing on the engine where the connects is where the thermostat is located.

no timing has not changed i would try crank sensor ,and change number 4 plug and coil pack

1. drain coolant
2. remove engine cover
3. remove the 2 bolts from water hose connection (upper rad hose connecting to)
4. remove o-ring and thermostat
5. repeat in reverse order