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R0CKKR4WL3R 07-03-2013 08:10 PM

ANOTHER overheating WJ
Did a search of the site and read almost all of everyone else's problems. Found some to be very informative and others could have been, but the thread stops with someone's insight, but no fix or remedy. Your idea sounded good, but "how"?

So on to my jeep...'01 Grand Cherokee Laredo 4.0 with 250,000 miles. Cooling fan is engaged ALL the time. Even when off, I need to remove the fuse or disconnect the fan plug. Up until today, the temp gage USED to read correctly. I found at 210-degrees, the radiator cracked and puked coolant all over the ground without warning. I was actually quite happy until that moment, that it was running great aside from the fan issue. This is the THIRD radiator in a month that I've had to install. Every day it has exploded, the temperature outdoors was 86-92 degrees and humid. Thus making me VERY unhappy!

The radiator, cooling fan, and waterpump were replaced before I bought it. I've had it a year and a half and now I'm at the mercy of the cooling system.
So far I've replaced the cooling fan once, the fan relay 8 times with some working fine and dying, others keeping the fan on all the time, and some not turning it on at all.
As I stated, the radiator has been replace 3 times (not by choice), and the thermostat replaced once.
The heater core is BRAND NEW, from Mopar.
At this point I'm about to replace the waterpump...again, and the Temperature control sensor.
I'm just trying to have a NORMAL RUNNING VEHICLE, in which at this point, I've forgotten what that's like to own. This is my first Jeep after 12 GM vehicles and I'm trying to build a loyalty to the brand, but finding it difficult as my patience is running VERY low. Especially after installing 3 radiators in a month and 2 in under a week. So now it's sitting as I use public transportation, which I hate, until the ENTIRE cooling system is brand new.
If the factory cooling system was touchy from the beginning, has anyone come up with a good aftermarket build that keeps the engine cooler than factory? Trophy truck style? I love building this thing, but I HATE repairing the cooling system every week!
Thanks in advance.

Boomer914 07-03-2013 08:19 PM

Re: ANOTHER overheating WJ
might be a stupid Q? But are you using the correct coolant?

R0CKKR4WL3R 07-03-2013 08:49 PM

Re: ANOTHER overheating WJ
Straight from the Dealership. Bright orange, MOPAR brand, NOT GM's Dexcool!

Strongjeff 07-05-2013 05:01 PM

Re: ANOTHER overheating WJ
did you install the thermostat properly, ive heard of people putting them in backwards

R0CKKR4WL3R 07-05-2013 08:21 PM

Re: ANOTHER overheating WJ
yeah...spring side IN the head and pointed end inside the thermostat housing.

Strongjeff 07-06-2013 01:55 PM

Re: ANOTHER overheating WJ
the only thing I can think of now is that you may have some clogged passages in the block

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