Originally Posted by desertrat71

my bros 1992 cherokee did same thing. put new sensor in it. replaced the thermostat. steel ran a little hot and would overheat on the freeway. flushed the radiator and pulled the water pump off and found the person that put it on before we bought it screwed it up . they put a crap load of silacone on it and it was pluged up and not flowing right. now it runs a hair under the 210 before the fan comes on and cools down to 195. runs great on the freeway now.

Originally Posted by whatisfreedumb

well just before i replaced my coolant temp sensor it completely spiked out to 260 but there were no visible signs (smokes, sounds anything of that nature) and the check engine popped on stayed on i parked it immeadiately and began to troubleshoot it hooked it up to the od and it shot po118(engine coolant temp circuit) hence the reason i replace the sensor. right after the replace and the code wipe nothing was shooting and it was running alot better. my needle wouldnt barely reach 210 and as soon as it did the thermostat would open and you could watch the temp needle drop to 195 instantly at a normal speed.

Originally Posted by widefieldcherokee

i just put a new radiator and temp switch in my cherokee and i rarely see 210 it usually stays within that line between 100 and 210 and 210 lol is that bad that its always running cool?

Originally Posted by 00Pajeepcherokee

My 2000 did this one time an it cleaned out the motor. It was a cracked head an I drove it a total of 30 mins after it overheated an parked it. When we finally tore it down a rod was getting ready to fly. These deffective heads are no joke. Check oil for extra fluid. That thought never crossed my mind till too late...