Merkatroyd
NAXJA Forum User
- Location
- North Carolina
Hello all, first post,
My XJ 4.0L won't stop overheating. (in park or driving)
This is a long and complicated story, I will try to keep it simple: Me and a friend replaced the motor in my jeep with a motor from another jeep 2 weeks ago. The jeep began overheating, and I noticed the water pump was leaking, so I replaced it, but the overheating continued. (It also got coolant in the oil when it overheats, a problem which disappeared after I replaced the head gasket.)
I removed the thermostat, placed it in boiling water, it opens and shuts just fine at the right temperature (195 degrees) so that isn't the problem. However, I replaced it anyway with another one which I also tested. I replaced the temperature sensor located at the front of the cylinder head next to the thermostat. The fan shroud, radiator, and electric fan have all been replaced about 1 year ago in an unrelated project. I also replaced the fan clutch too. the problem still persists. I made sure there were no air bubbles in the motor either. I parked it on a hillside facing upwards, and filled the coolant until it was flowing out of the cylinder head.
The only time it won't overheat is if I remove the thermostat completely. Then it just runs a little cold, maybe 115-130 degrees.
Anyone have any ideas why my car won't stop overheating?
My XJ 4.0L won't stop overheating. (in park or driving)
This is a long and complicated story, I will try to keep it simple: Me and a friend replaced the motor in my jeep with a motor from another jeep 2 weeks ago. The jeep began overheating, and I noticed the water pump was leaking, so I replaced it, but the overheating continued. (It also got coolant in the oil when it overheats, a problem which disappeared after I replaced the head gasket.)
I removed the thermostat, placed it in boiling water, it opens and shuts just fine at the right temperature (195 degrees) so that isn't the problem. However, I replaced it anyway with another one which I also tested. I replaced the temperature sensor located at the front of the cylinder head next to the thermostat. The fan shroud, radiator, and electric fan have all been replaced about 1 year ago in an unrelated project. I also replaced the fan clutch too. the problem still persists. I made sure there were no air bubbles in the motor either. I parked it on a hillside facing upwards, and filled the coolant until it was flowing out of the cylinder head.
The only time it won't overheat is if I remove the thermostat completely. Then it just runs a little cold, maybe 115-130 degrees.
Anyone have any ideas why my car won't stop overheating?