:confused: 89 XJ overheating
I put a rebuilt 4.0 Renix engine in my XJ back in June. I replaced the water pump, radiator, t-stat, all the hoses, electic fan, fan clutch and expansion tank. It overheated to about 235-240 shortly after. I hooked up the electric fan to a switch and flushed and vacuum filled the system. I still have problems with it getting hot going up hill, while towing and long drives. It will stay about 220 or so when I turn the fan on. Going down hill and on the gas lightly it drops to 140-160. I will overheat sometimes while sitting at a light. Not sure what could cause this. Not sure if I blew the head gasket or not. Any thoughts on this matter would be helpful thanks.