06-12-2004, 11:10 AM
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I purchased a '99 XJ 4X4 4.0 automatic last week and I'm going through the vehicle now to catch up on the maintenance.
I noticed that the temp gauge hovers near or on the 210 degree marking on the gauge. Seems a little high if the thermostat is 195. What is "normal" for a Cherokee 4.0L?
Thanks for any feedback!
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06-12-2004, 06:25 PM
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Real Name: Harry
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sounds ok to me
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06-12-2004, 06:57 PM
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Considering water boils at 212 deg. Now you have antifreeze under Pressure, That will take about 230-240 to boil. So ya I'd Say thats about right too give ya heat in the winter. You could go as low as a 160 deg stat, But You will get less heat..
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06-12-2004, 10:24 PM
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my yj hovers at around 205
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06-12-2004, 10:39 PM
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Hi,
The 6-cylinder engines do have a normal operating temperature of about 210 degrees F.
It is fine 
-Nick 
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1988 Jeep Cherokee w/ 410,000+ miles. Now a 100% Electric Vehicle!
NO Gas, NO Emissions, NO Problem! -- http://www.DriveEV.com/
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06-12-2004, 11:37 PM
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Real Name: Geoff Pignotta
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Hi, I was going to post a similar thread. My 91 YJ (with a 4 banger) had an operating temp of 210°F. I just replaced the thermostat (and heater core and their hoses along with a rad flush) with a 180°F variety. Now my operating temp has dropped to about 185°. I assume this is because of the thermostat change (and possibly the other cooling system replacements). Is that the correct assumption?
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---1991 Wrangler, 1\" BL, 31x10.5 Pirelli Scorpion AT\'s, K&N filter, almost stockin\' still rockin\'---
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06-13-2004, 06:47 AM
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Real Name: Harry
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Quote:
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Originally Posted by White
Considering water boils at 212 deg. Now you have antifreeze under Pressure, That will take about 230-240 to boil. So ya I'd Say thats about right too give ya heat in the winter. You could go as low as a 160 deg stat, But You will get less heat..
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My first YJ had a 160 and the heat was non existant on a cold day on the highway. I changed it to a 195 deg and all was well again. |
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06-13-2004, 07:20 PM
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Thanks for the responses - 205-210 degrees just seems to be much hotter that any of my other vehicles are running. I might consider going to a 180 degree stat - don't know if that will cause a trouble code to set.
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06-13-2004, 11:42 PM
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According to every jeep forum I've been to, 210 is exactly where the 4.0 is designed to operate. I don't think you should mess with that.
You are right, it seems high, but it's correct.
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Currently own a 98 XJ bone stock, but click Here:  For pics of my TJ and old XJ.
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06-14-2004, 12:10 AM
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At what temp is it designed to leak oil all over the dam place ?  |
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06-14-2004, 12:22 AM
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Quote:
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Originally Posted by White
At what temp is it designed to leak oil all over the dam place ? |
What ever temp the Jeep is operating at. 
__________________
Currently own a 98 XJ bone stock, but click Here: For pics of my TJ and old XJ.
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06-14-2004, 12:26 AM
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Here is just one of the many threads I've read where they refer to this.
http://www.naxja.org/forum/showthrea...&highlight=210
This one talks about "Water Wetter." Anyone use that product?
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Currently own a 98 XJ bone stock, but click Here: For pics of my TJ and old XJ.
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06-15-2004, 11:30 PM
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Real Name: Max aka jeepmaster
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mine runs a hair beneath 210
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Summit County, Colorado - 96 XJ - Magnaflow exhaust, K & N filtercharger, H4 conversion, MT/R's on 767's, safari rack, hot blonde and an Australian Shepherd riding shotgun
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For pics of my TJ and old XJ.
