My '94 cherokee has an inline 6 4.0 and I think its getting too hot, but im not sure. Its running at around 210 plus without a/c in this bullcrap 100 degree weather and when i turn the ac on it gets up to like 230. Also when the motor has been running that hot and i shut it off then start it back up sometime later it starts to shake the motor bad so kinda like a rough idle i guess you could say. My water pump just got replaced last night (boy that was fun) and I thought it would stop those problems but it didnt haha Is this just normal or should i fix it if its too hot? If so where do i start now.

 

Anyone? Haha

 

Flush your heater core and your radiator. Make sure your t stat is working properly and are your fans working properly?

 

Yes my fans are working and how do I check the tstat?

 

I put mine in a pot of water and wait for it to open. Honestly tho they are cheap. After you flush everything, if it still runs hot then relpace the t stat

 

Alright you got any tips on flushing it?

 

There is a plug to drain the radiator behind the front right headlight housing, when I cleaned mine out I just ran a bunch of distiller water through it, and it doesn't hurt to just get a new t stat, I think a new one is like 5 bucks and it takes 10 minutes to install

 

Ok thanks and ya im getting a new tstat monday and if that doesnt work im gonna flush it

 

Get a new T-stat pronto. I recommend a 195 degree stat purchased directly from a Jeep dealer for the best reliability and temperature control. Set you back about $8.00. There are PLENTY of crap stats out there. I have by far had the best luck with an authentic MOPAR stat.

Be sure ALL other parts of the cooling system are good. They work in concert. Flushing may or may NOT restore flow to a radiator; radiators are about $100 to $200. Replace it if it's old, rather than flushing it. And replace the radiator cap too. 16 pound cap with no release lever.

There is no better money spent than that spent on cooling system maintenance. Do it.

 

Alright thanks, but our jeep dealer in town just got bought out so the closest one to me now is a good 30 mile drive would it just be better to get a 195 degree one from autozone? for now anyways?

 

whens the over heating occuring idle or driving and define working as you say the fans are?

 

Yes.

 

Well as i said i just replaced my water pump. but before that it got hot on the highway and in town. but now it does fine on the highway with the ac cranking but in town is when it starts to get hot even at idle it will get way to hot i stopped at the gas station last night after i was driving for maybe 20 mins with the ac on and i shut it off and when i turned the ignition the gauge was almost in the red. and My mech fan works i know that and my e fan will kick on around 220 i think at idle while im on the road i dont know

 

Alright cool, do you have any idea why it is idk sputtering you could say at a hot start? It sounds like its about to die when i first start it then once i give it gas it goes away. Im changing the fuel filter soon cause i thought that could be the problem

 

did u burp it when u refilled after the water pump replacement?