You could pour beer or Gatorade in your system and it would cool just fine. If all the components were in good condition.

It's not the coolant or the thermostat. We have already told the OP that his problems lie deeper. It seems to me the OP is in denial about this, and is looking for a band-aid solution to his problem.

Flush the engine and replace everything except the heater core. It's not all that expensive or hard to do. If the engine still overheats, it may be a cracked head and/or a blown head gasket.

 

I know what you mean. People waste money on non issues trying to avoid the actual issue some times.

 

I accidentally mixed the two different coolants not for any reason, other than the fact I was completely unaware of why I shouldn't mix the orange and green. I'm flushing to get that sludge like mixture it made out of my system and any debris (hopefully not pieces of the cooling system components but just any coolant fluid build up if that happens) but mainly to get the mixed coolants out and replace it with just the green. The radiator was replaced a few years ago but my Jeep sat in the garage for the past 3 years until I could fix it up, so the radiator was only used before those 3 years and just for the past few months. Since it's fairly new I'd assume it's an aluminum core and not lead but I'm not sure. I'll find out when i get home later on. I also checked the hoses for ruptures but I will check more thoroughly later on. The cooling system is fairly new but I'm going to my mechanic on Friday so he will take a look (big time jeeper. Selling his '89 XJ V8 that he made 3 feet wide and modes like no ones business for $15k due to being one of a kind if anyone is interested in buying.)

 

"Sludge like mixture" could be a mixture of coolant and oil.

If the radiator has fluid in it it is being "used".

 

Yeah I will be checking that the core is still good tomorrow. Somehow. But I will. And it's not like a sludge consistency but a sludge like color that is from the green and orange combining. Either way. All the fluid in the coolant system is being flushed and replaced properly in about 2 hours

 

OP.
You need to go over everything in your cooling system.
Take it from me. PO did not replace everything necessary when he had a overheating issue,& now I am replacing the entire cooling system along with a head rebuild.
Review your entire system & replace as necessary.
Jeep comes stock with a 195* thermostat.
They also made a 180* extreme duty(towing) thermostat that is available.
Nothing wrong with going with the 180*, when u replace everything else.

 

I'm going to get it flushed today by a place that specializes in cooling systems (I said I would yesterday and the day before but the machine they use broke and I need it flushed not drained) and they will put in the RIGHT coolant (lol) then my mechanic (mentor also) after that so he can use his 6th sense for Jeep issues and we will check it out for everything that people posted in this thread. Then also track bars and a couple minor checks.

 

This may help...

 

I also live in LA but I live In Santa Clarita where last couple of weeks it was over 100 , I installed a Champion 2 row all aluminum Radiator I got from Jegs . even when it was over 100 stuck in traffic the engine still was running at 195 . also have a new fan clutch . hope this helps

 

This thread is from almost exactly 2 years ago guys.

 

Wow I didn't see that .

 

OH yeah, i completely replaced every stick'n part that is directly or indirectly related to the coolant system.
And all of those parts were OEM Mopar.
Even upgraded to the NAPA HD fan clutch.
Still have rough engine hot idling before the efan finally kicks in.

I strongly suspect the elevated heat under the hood at prolonged hot idles is causing a precursor vapor locking condition at least with my 4.0.
My reasoning? When i manually turn on the efan, the engine settles down in a matter of a few seconds.
The efan flows cooler air right over and through the injectors, intake and exhaust manifolds.

Face it some of these 4.0s especially the later years like it or not run hot.

My suggestion to the OPer if all else fails and you've thrown all the parts and flushes you can think of at the cooling system, install a manual efan over ride switch.

 

lol yeah this is a pretty old thread. I still never flushed it. Ended up being my radiator that was clogged up but I didn't replace it until last September along with a new zj m-fan clutch because my lasy one was shot. I also had to replace the thermostat because that rusted shut because my Jeep did sit for so long. Only had a 180 in stock and I needed to get to class that next morning. This was last summer. Now I run at 180 unless I sit in traffic in the hot weather and blast the AC, then it will get up to 210. But I am going to revert it bac to a mopar 195 thermostat and stock fan clutch along with a new water pump because god only knows the state of mine because it is deffinitally over 8 years old. But perks of living in LA is that rust is only an issue if you let a car sit for years with stagnant coolant in the system. Oh wait. That happened to my xj... but I think it should run just fine with stock parts, but goood quality stock parts.

 

is the water pump working?

 

Old thread new thread information is the same and can and does apply to the same issues today.

To imply that old issue are dead and gone because it was in the past is retarded.