Forum Index
Jeep Horizons HomeLinksJeep Horizons Tech Write-upsJeep newsLand useContact

 Watched TopicsWatched Topics   FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Cherokee overheating


 
Post new topic   Reply to topic     Forum Index -> Cherokee Forum
View previous topic :: View next topic  
Author Message
DavidXJ
Member


Joined: 07 Sep 2006
Location: Visalia, CA

PostPosted: Thu Sep 07, 2006 9:12 am    Post subject: Cherokee overheating Reply with quote

My brother and I just replaced every component of the cooling system on his '95 Cherokee, and it still overheats when I run the AC and it is over 90 degrees outside. He has a new 3-core rad, new BRX hoses, new 50/50 coolant mixture, new Flow-kooler water pump, new Hesco thermostat housing, new 195 degree hi-flow thermostat, new '97+ style auxilary electric fan, new fan relay, new fan clutch... and the thing will still overheat when I drive over 65 mph. It never gets above 145-155 degrees, but it is still annoying. With these upgrades, I should be able to pull a trailer uphill at 75 mph in 110 degree heat with the AC on and still not overheat. Has anyone else had this problem?
Back to top
View user's profile Send private message
94BGCherokee
Member


Joined: 22 Jun 2006
Location: Saint Louis, MO

PostPosted: Mon Sep 11, 2006 7:39 pm    Post subject: Reply with quote

I hear ya out man. I have 94 XJ with many of the same mods. Although Im not quite sure why you would be complaining about 145-155 being to hot, I had problems in the summer time as well with it getting over 210-220 mainly when sitting or city driving. Did you flush the hole system including the engine itself? Let me know if that was a type or whats going on with that. I live in Saint Louis and I had a 180 balanced thermo from mr gasket. Good Luck!!!!!
Back to top
View user's profile Send private message Send e-mail AIM Address
ThePhantum
Pissed-Off Admin
Pissed-Off Admin


Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Mon Sep 11, 2006 8:27 pm    Post subject: Reply with quote

I'm not sure I follow....it's running at 145-155 degrees and you think that's overheating (it's not), or it's actually steaming and boiling over but the temp reads 145-155 degress when doing it? If it's the latter, my call would be a blockage causing the coolant not to flow (even if you flushed it, there could have been some residual buildup in the motor that has now plugged up the rad).

Heat then builds on one side of the blockage, while on the other side (where the temp sensor is) there is no coolant. Aside from a bad sensor, that's about all I can think of that would cause a low temp reading and overheating.

Now it's possible that the sensor is bad, causing the ECU to keep the engine in open loop and eventually overheat. What I'm not sure of is if the 94 has 2 sensors like the later models...one for the ECU and the other for the gauge. It's worth investigating.
_________________

97 XJ Sport with a bunch of stuff
Quote:
Never argue with idiots, they drag you down to their level and beat you with experience
Back to top
View user's profile Send private message AIM Address Yahoo Messenger MSN Messenger
DavidXJ
Member


Joined: 07 Sep 2006
Location: Visalia, CA

PostPosted: Tue Sep 12, 2006 6:21 am    Post subject: Reply with quote

OK, so I'm an idiot. When I wrote 145-155, I meant 245-255, or just below the red line. It hasn't actually made it onto the redline, but it's close. It also seems to do it worse when I have the AC on, and I'm not sure if this is just because of the extra load on the engine, or that some sensor gets screwed up. Sorry about writing the wrong tempeture.
Back to top
View user's profile Send private message
ThePhantum
Pissed-Off Admin
Pissed-Off Admin


Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Tue Sep 12, 2006 9:23 am    Post subject: Reply with quote

Does it overheat or run hot when the AC is not running and it's hot outside? If so, there could still be an obstruction someplace preventing coolant from flowing freely. If not, the compressor bearings might be shot and putting a bigger load than normal on the engine.
_________________

97 XJ Sport with a bunch of stuff
Quote:
Never argue with idiots, they drag you down to their level and beat you with experience
Back to top
View user's profile Send private message AIM Address Yahoo Messenger MSN Messenger
Display posts from previous:   
Post new topic   Reply to topic     Forum Index -> Cherokee Forum All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Visit links4jeeps.com for write-ups, forums and clubs




Jeep®, Wrangler, Cherokee, Liberty and Grand Cherokee are copyrighted and trademarked to Chrysler LLC.
jeephorizons.com is not in any way associated with or endorsed by the Chrysler LLC.
All other content is copyright Jeep Horizons 2004-2008.
Tech write-ups Links Discussion board Land use News Site Map Terms of Use

Powered by phpBB © 2001, 2005 phpBB Group