Back in June my 4.0 99 TJ started overheating while I was away from home several hours. Finally brought it home later that month, temps stayed around 230 on the drive. Replaced the water pump, thermostat, radiator cap, temp sensor, and fan clutch, all of those parts are OEM Mopar. Fresh G-05 coolant mix. Original radiator blew apart in 2021 and was replaced with brand new OEM Mopar along with new rad hoses. System was burped on an incline with rad cap the highest point. Radiator had good flow with a garden hose, block was flushed out, coolant system was gas tested for combustion gasses 3x and each time was negative. I'm at my wits end here, any ideas?
Temps have been verified wit heat gun and OBD scanner. The coolant will boil in the overflow bottle if left running or driving for a period of time longer than 30 minutes. It doesnt matter if its idling or driving, still overheats. No coolant in the oil, no oil in the coolant.
Temps have been verified wit heat gun and OBD scanner. The coolant will boil in the overflow bottle if left running or driving for a period of time longer than 30 minutes. It doesnt matter if its idling or driving, still overheats. No coolant in the oil, no oil in the coolant.