Jeep Guy

what's your normal peak temp in the summer with the A/C on in heavy traffic? just curious as to what you all are experiencing. I live in deep south texas where it is normal to have temperatures in the upper 90's all summer long. summer starting in May and ending in November. I have swapped out my entire coolant system and still peaking at maybe 220. I am a little nervous at that point. I really don't want to overheat.

thanks for your help.

ol"blue

Good info and interesting write-up.-> Jeep Horizons :: Jeep Cherokee XJ Cooling System Upgrade

jd4x426

mine runs aorund 200 sometimes creeps up to 215 but never more then that

Jeep Guy

I have replaced everything. new hoses, heater and radiator. new fan clutch. new thermo. new temp sensor. new rad. new trans filter. but the Jeep is still climbing to 220 or more when sitting in idle. what next?

97XJ

mine was running around 210 all the time,and was going up to 215 to 220 with a/c,just installed a 180 thermostat,and runs around 210 with a/c idling.here is a good web site to look at http://www.go.jeep-xj.info/index.htm has all kinds of repairs for the XJ.

jd4x426

you might want replace the heater control valve they say if it is nt working it can cause you to have a high temp also what radiator did you put in

Jeep Guy

radiator was just a single row rad. I will look into replacing the heater valve. it looks pretty rusted out.

mobilecherokee4

i live in alabama and its been 110 degrees with the heat index the past 3 days and mine is runnin between 210 and 215, 210 is normal for me idling though, i think it runs better a little hot, 220 might be a little much though

xj2000

Possibly either the dash temp indicator meter or temperature sensor on the thermostat housing may be inaccurate. Just my 2 cents.

caged

it's normal to run hot with the a/c on when not moving very fast.
many overheat while on the trail when running their a/c.

make sure your a/c fan is kicking on and check for spin. i've seen some later xj a/c fans turn very slowly. you may need to replace it.

a1racer

I top out at 210 even when sitting ideling and sitting. But I had to do some work to get it like that. New hoses rad flush 180 tstat. But it's sticks to under 200 if I am moveing.

mobilecherokee4

yeah me too its at regular temp when moving

Jeep Guy

when I'm moving at 25-30mph it will be at 185-190. it's just when I'm idling is when it starts climbing. tomr I am checking for any air in the coolant system. then possibly the sensor.

fantic238

Did u make a little hole on the thermostat plate? I always do it when i change it, it helps the air bleeding.

Jeep Guy

I pulled my thermostat. I don't usually like using one.