2005 LJ cooling issues. - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-14-2013, 03:50 PM   #1
Newb
 
HicksFromTheStix's Avatar
 
Join Date: Mar 2013
Posts: 6
2005 LJ cooling issues.

Had my 4.0 start overheating this weekend. Found a bulging upper radiator hose, and replaced it. Have a 180 degree thermostat in it that was put in last summer. Coolant is topped off, dont have any answers. Checked water pump and no leaks, apars to be working fine. Jeep has 70k in miles. Any suggestions?

HicksFromTheStix is offline   Quote
Old 05-14-2013, 04:35 PM   #2
Jeeper
 
Dextreme's Avatar
 
Join Date: Oct 2011
Location: Oregon City, OR
Posts: 4,129
Images: 1
Somehow the water isn't flowing...so the thermostat is not opening or the impellor fins on the waterpump might be shot. Or you could have a blockage in the radiator.

What coolant grade are you using?

__________________
'99 Chilli Pepper TJ Wrangler "Mistress"
33x12.5 DuraTracs
Zone 4.25"
Dextreme is offline   Quote
Old 05-14-2013, 04:50 PM   #3
Newb
 
HicksFromTheStix's Avatar
 
Join Date: Mar 2013
Posts: 6
Im using OReilly 50/50 mix. I just looked at it and its for older vehicles. That may be part of the problem. I also thought about just pulling the thermostat out. It may have gotten some debris in it. Thanks for your ideas.
HicksFromTheStix is offline   Quote
Old 05-14-2013, 04:56 PM   #4
Jeeper
 
UnlimitedLJ04's Avatar
 
Join Date: Aug 2010
Posts: 7,789
Quote:
Originally Posted by HicksFromTheStix View Post
Im using OReilly 50/50 mix. I just looked at it and its for older vehicles. That may be part of the problem. I also thought about just pulling the thermostat out. It may have gotten some debris in it. Thanks for your ideas.
Your Jeep needs HOAT coolant. Mixing other types of coolant with it will cause chemical reactions inside your cooling system, which will ultimately destroy the entire system.

here's more info:
HOAT Coolant Summary, and this video helps.

now that you've contaminated the system, you need to thoroughly flush it with distilled water, and start over using this procedure.

make sure the thermostat has a bleed hole, and will correctly bleed air from the system. also, the jeep should run at 195-210°F, 180 is actually too cold.
UnlimitedLJ04 is online now   Quote
Old 05-14-2013, 04:56 PM   #5
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 33,824
Images: 2
The factory specified thermostat is a 195 degree model, your computer & its programming will be much happier with that instead of the 180 presently installed. Not to mention a lower temp thermostat won't keep the engine any cooler when things get hot.

Also, make sure to never install a "fail safe" thermostat. They get stuck in the open position way too easily which means the engine won't warm up as quickly as normal which will keep the 02 sensor out of the loop which means less mpg & power.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote
Old 05-15-2013, 10:13 PM   #6
Jeeper
 
Join Date: Feb 2012
Posts: 87
Spray the mud out of your radiator with a hose! Haha
Green LJRub is offline   Quote
Old 05-21-2013, 11:15 AM   #7
Newb
 
HicksFromTheStix's Avatar
 
Join Date: Mar 2013
Posts: 6
Thanks to everyone for their input and suggestions. We did find that the upper and lower radiator hoses needed to be replaced, as did the thermostat. My wife, before she left for our daughter's graduation, diagnosed it correctly by saying she didn't think the fan was turning fast enough. So after have numerous "mechanics" check it out, my wife ended up being the correct one. It was the fan clutch that had gone out. We flushed the system, and put G-05 coolant in it. She's running fine now. So if you're working on your rig, and your wife makes a suggestion, take my advice and listen.

HicksFromTheStix is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 11:07 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC