scjeep69

ok so my 96 cherokee is over heating ive done replace the t stat brand new high flow water pump and just flushed the radiator this weekend and still over heating... i have to run my heat just so it doesnt fully over heat with the heat on itll stop at 230 i have no water in my oil im not loosing any coolant my fluid levels are always fine i just dont understand whats going on anyone have this problem? what can i do to fix. my head gasket isnt blown bc its no l;oosing water or getting in my oil everything seems to been fine besides the over heating

kyledye25

Hows your rad? new or old. It could be clogged. I have had that happen. It works but its a little clogged and it wont let the coolant flow through fast enough. Just a guess.

DaddyCat

You should confirm it is as hot as the gauge says with a Non-Contact infrared thermometer pointed at the thermostat housing. I'm not sure if an auto parts store will lend such a tool but I see AutoZone sells one for ~$30.

scjeep69

i was looking into a new rad. a performance one runs 213 from my local advance and a stock one runs 120 i really dont have that kindof of cash bc if im buying a new one it will be a performance ones so ill be sure to try that in a week or so


and i was wondering about my guage being acc. as well im def willing to look into that first bc the p.o. has some kindof adpter fitting in the stock hole to fit a def sensor but its still wired into my factory guage so idk i need it fixed asap not wheeling is killing me!!!!!!!

3x-xj

You have air in the system, and its kinda tricky to get out. Once its up to temp, and the thermostat is open you'll be able to ad more fluid. play with it with the cap off and just wach it and ad more fluid. it might take several heat cycles to get it all the air out. When youre at it have the heater on so that the heater core will purge too.

kyledye25

There could be air in the system. Ur right on that. I just did a coolant flush on my 96 country. But didn't want to sit there and watch it. So I over filled my overfill tank. It took about 4-5 heat up and cool down cycles before the coolant level in Tue tank stayed the same.

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morettivtx

if there is air in the system it'll probably be near the heater core... does the heat blow hot?

kyledye25

What coolant are you using? I just bought my jeep a few months ago and the previous owner had cheaper coolant in it. So since I work in a Toyota shop I put in Toyota red coolant which Ian long life. Jeep runs a tiny bit cooler now. It used to go over the 210 mark prob around 230ish. And its not even that warm yet here in western pa. Now it will hit 210 but won't go over. I recommend getting better coolant if you do get a rad.

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tjwalker

Details needed.

When is it overheating? At idle, on the road, or both?

Have you verified the operation of both the fan clutch and the e-fan?

Radiator cap new?

The #1 cause of temp creep at IDLE is the fan clutch. If you have an overheat in all conditions, I would suggest you replace your radiator.

scjeep69

yes the heats hot and i have to run it all the time due to if i dont itll over heat ill def try this and see if it fixes my problems bc it dont recall it over heating before i put my new water pump in... the only reason i changed it is bc i do wheel a good bit n have owned cherokees before n know the do run a lil hot so i figured dropping the t stat to a 170 n putting a high flow water pump would be better then stock so hopefully i can try getting the air out n itll fix my problem if not ill be buying a high perforamce radiator next weeek thanks for the help

scjeep69

the only time is doesnt over heat is when my heat is on full blast and im going down the road in traffic itll run up to 230 240... i have my fan wired to a switch so i can cut it on n off i keep it on all the time while driving n it helps a little bit.
i know cherokees run a lil warm n thats why i figured new water pump n a lil lower t stat would but good bc the p.o. was thr orginal owner n said he has never changed either of them and it has 230 000 mile so those were the first things i done to it

3x-xj

how is the cluch fan???

scjeep69

also my radiator cap isnt new but if anything was wrong with it wouldnt i be loosing or leaking coolant? jw i do all my work my self and have some mechanical knowlge but im not a mechcanic by no means when it comes to electrical or over heating im lost bc i thought i tryed fixing everything that cld cuase it to over heat

scjeep69

idk i have it wired to a switch when i crank it up i cut my fan on it turns good and seems to be working fine. if i dont keep it on it over heats bad but with it on it keeps it a lil cooler

tjwalker

Radiator caps need to hold pressure. Failure to hold that pressure can result in overheating. A failing radiator cap will not always leak or lose coolant.

A replacement is about $5.00 They are often overlooked.

Replace it (or at least pressure test it) just to be SURE you are not chasing your tail.

Should be a 16 pound and get one without a lever/release. That lever is not needed and is just another point for potential failure in the future.