Hey guys i need some help.... my 92 cherokee is over heating after a while of driving. But the wierd thing is that it keeps on coming out of the over flow when it does over heat... and it sucks because all i have is the f-ing idiot lights, so i cant read the temp. I Already put a new thermostat in it, the water pump is not leaking and its not loose. Thanks for the help guys

 

Oh man, that sucks. Yesterday, I had a crack in my overflow hose from where it rubbed on the power steering elec fan. When my jeep would warm up the coolant would overflow from the crack in the hose.

 

If that hose is ok maybe check your coolant temp sensor.

 

temp sensor or maybe it needs a full flush.

 

How old are the rad and fan clutch? More people have missed seeing the needle in the red zone than have missed seeing the red light.

 

Lots of variables have to work in concert here.

Radiator, radiator cap, water pump, fan clutch, thermostat, serpentine belt that drives the water pump.

How old are the radiator and water pump? If they're old, consider replacing BOTH. Radiator caps often overlooked.

Get it resolved ASAP as overheats are very hard on the engine, particularly the cylinder head and head gasket.

And I'd highly recommend that you plumb a coolant temperature gauge into the cab. Idiot lights are lame-o. They should be called "after the fact lights" as they come on after the damage is already done.

 

radiator is 2 years old, i just replaced the radiator cap, the water pump is probably original, don't have an electric fan... which sucks really bad, lol its a black jeep so attracts alot of heat... umm.. the hoses are all great they were replaced when the radiator was replaced.. anything else guys?? and yeah i hate the idiot lights thanks alot guys...

 

19 yr old water pump?????

 

Sounds like a blown head gasket.

Are you blowing white smoke out of the exhaust pipe yet?

 

id change this even if you think its still good ive heard of fins rottening off of old pumps

 

Yes I have seen this on engines when the coolant is not changed often enough.

 

I believe this water pump is less than 19 years old so it should still be fairly good.....the pic shows 4 of the 5 blades remaining.....just not attached.

 

Replace water pump, replace water pump, replace water pump.

And while you're at it, replace water pump.

 

...........and after u've done everything tj suggested......replace the water pump.

 

also make certain the radiator fins are not blocked. Can you feel air being pulled in through the radiator? If it isn't pulling air through it won't cool.
Also what thermostat did you put in? It should be 160 degree. Any higher they will overheat in traffic or slow driving such as trails.