2001 Jeep Grand Cherokee Limited is heating up

google how to determine if you have a 0331 head (4.0 motor only)
they are prone to cracking dont keep driveing ituntil u get too the bottom of the problem if oil is getting into the crankcase the bearings will be eaten away by the coolant
lots of info about this on various forums try cherokeeforum.com or just google grand cherokee forums

make sure coolant is at proper level. change the thermostat it may be bad and sticking. good-day !

Hi, It sounds like you may have air in your system, When topping-up all coolant system the system must be purged of air, also another tip is to open the heater valve to hot as if set to cold air will be trapped in the heater and when opened air will go into the engine. open all valves where coolant run's is a must,top-up system run the motor just for a few minutes check water level again top-up if need be and then repeat, If pressure still builds up inside the motor you will need to pressure test the system you may have a blown gasket or liner seal. hope this helps. regards peter

first find out where the oil came from, if its from the filter whoever replaced it is liable, if its a hole in the side of the engine then it threw a rod and you are out of luck, let me know what you find

these jeeps are famous for bad actuator motors, these are small motors used to control the heater door, you may have a bad one that controls the hot and hot door, it may be stuck on cold. also make sure your coolant is full , i dont see any other problem that would cause this, a bad thermostat would give some heat, it may take a while but you would get heat,i would first check the coolant level then check the blend door operation to see if motor is bad. hope this helps.

No reset for the light, recheck all connections again and clean sensor in recovery tank/resevoir

You may have the blend doors problem which means the blend doors are in the closed position only allowing cold air. They need to be fixed. Google "heatertreater" to see full explanation and fix.

most likely the heater core.check carpet in front under dash for moisture.

It could also be the rheostat that controls it. it's on the fan plenum under the dash. inserts into the plastic plenun.

If your oil is white looking on the dip stick, you will have serious damage inside the engine.