NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > OEM Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

OEM Tech Discussion Forum for OEM (Original Equipment) or stock XJs and MJs.

Reply
 
Thread Tools Display Modes
  #31  
Old July 3rd, 2019, 09:50
Dragonslayer Dragonslayer is offline
NAXJA Forum User
 
Join Date: Feb 2004
Location: Los Angeles
Posts: 296
Re: It's been discussed a millions time so what's a million and 1 more

Every time I have the radiator out of the car, I take a garden hose and blast the AC condenser clean from the rear (engine compartment side). Then blast it from the front.
Repeat a few times. It's always good for lowering the engine temp a few degrees.
Reply With Quote
  #32  
Old July 3rd, 2019, 20:19
MichXJdad's Avatar
MichXJdad MichXJdad is offline
NAXJA Forum User
 
Join Date: Apr 2019
Location: Detroit Rock city
Posts: 93
Re: It's been discussed a millions time so what's a million and 1 more

Boiling with a 50/50 mix is 223*. See what I'm saying now? The factory runs them too hot for emissions reasons, run a cooler thermostat and put your efan on a switch , I used my rear wiper switch( deleted the rear wiper) Ran today in 93* with the AC on in 70% humidity. Ice cold AC inside, max operating temp was 210 or less in stock trim( stock fans, stock shrouds, 50/50 mix, newer stock radiador, Not close to overheating, but too hot for me. I have a new 180 stat, gasket, housing, sensor, and s-blade efan to replace the stock clutch fan coming, and I'll do a write up on it.
Reply With Quote
  #33  
Old July 3rd, 2019, 20:22
MichXJdad's Avatar
MichXJdad MichXJdad is offline
NAXJA Forum User
 
Join Date: Apr 2019
Location: Detroit Rock city
Posts: 93
Re: It's been discussed a millions time so what's a million and 1 more

Running too hot is as bad as not changing your oil often enough in my opinion
Reply With Quote
  #34  
Old July 3rd, 2019, 23:28
lawsoncl lawsoncl is offline
NAXJA Forum User
 
Join Date: Jan 2006
Location: North Idaho
Posts: 5,030
Re: It's been discussed a millions time so what's a million and 1 more

[QUOTE=MichXJdad;246653884]Boiling with a 50/50 mix is 223*. /QUOTE]


That's unpressurized. Assuming your radiator cap is working, the boiling point for 50/50 is 267*F at 15 psi
Reply With Quote
  #35  
Old July 4th, 2019, 06:28
Heavyopp Heavyopp is offline
NAXJA Member
 
Join Date: Jan 2017
Location: Middlesex, NJ
Posts: 777
Re: It's been discussed a millions time so what's a million and 1 more

Quote:
Originally Posted by Jeepercreeper01 View Post
The efan comes on at 210 as well as when I turn on the Ac. All of this was replaced with new parts when the new motor was dropped in. Even though am not using the heater during this time of year. Would a plugged heater core cause this?
Interesting that you say your efan comes on with the AC compressor on a 2001 — it shouldn’t

A plugged heater core certainly won’t help — you could bypass the heater core by just connecting the hoses with some copper pipe and a couple of elbows

Have you tried flushing the heater core?
Reply With Quote
  #36  
Old July 4th, 2019, 11:10
RCP Phx RCP Phx is offline
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 12,445
Re: It's been discussed a millions time so what's a million and 1 more

OP, I've been here for 57 yrs and have had very few issues with temp unless something is wrong. A lot of those "so called" hi-flow water pumps are just that. The heater core is part of the cooling system as the later models flow all the time so that could be a problem. Buying or making a ported/freeflow thermostat housing is a good idea.

When I built my stroker I had B+G custom tune my PCM and had them set the E-fan temp for 200*.
Reply With Quote
  #37  
Old July 4th, 2019, 17:43
MichXJdad's Avatar
MichXJdad MichXJdad is offline
NAXJA Forum User
 
Join Date: Apr 2019
Location: Detroit Rock city
Posts: 93
Re: It's been discussed a millions time so what's a million and 1 more

Digging around a little it appears you can possibly get the pcm reprogrammed at a dealer for the Efan to come on with the AC on 2000-01's, and possibly at no charge. No guarantee on the freebie part. Almost sound like there may be a TSB on this.
Reply With Quote
  #38  
Old July 8th, 2019, 17:05
MichXJdad's Avatar
MichXJdad MichXJdad is offline
NAXJA Forum User
 
Join Date: Apr 2019
Location: Detroit Rock city
Posts: 93
Re: It's been discussed a millions time so what's a million and 1 more

Two things to also think about, the AW4 with an inline-six has a suggested operating range of between 125-176 degrees. Most other Jeep autos (727, th400, 42rle) need to run between 150-200 degrees. And non synthetic, conventional motor oil starts to break down at temps over 230. So when your driving your XJ around in extreme heat coolant temp shouldn't be your only concern.
Reply With Quote
  #39  
Old July 11th, 2019, 19:01
Jeepercreeper01 Jeepercreeper01 is offline
NAXJA Forum User
 
Join Date: May 2019
Location: Arizona
Posts: 6
Re: It's been discussed a millions time so what's a million and 1 more

Ok. I think I'm going to buy a new heater core and replace this fall. In the mean time I'm going to bypass the hoses. Sounds like this could help not only with the cooling issue but to help determine if it is in fact the core itself. Since all have the dash ripped out might as well replace the evap as well.
If all else fails I'm going to run without a t-stat. Ireally though replacing all the cooling components and motor would have fixed this. Forgot to mention that I also added hood vents too.
This is so damn frustrating. Thanks for all your help and really useful knowledge!
Reply With Quote
  #40  
Old July 12th, 2019, 07:51
Heavyopp Heavyopp is offline
NAXJA Member
 
Join Date: Jan 2017
Location: Middlesex, NJ
Posts: 777
Re: It's been discussed a millions time so what's a million and 1 more

It's pretty easy to set up and flush the heater core -- Use a harbor freight 12 volt pump and a bucket of hot water with your radiator flush chemical of choice -- rig up some hoses and pump the cleaner thru -- be sure to swap directions and run it backwards too -- you wont believe the crap that will come out
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
They would have made millions 98_XJ_Classic Non-Tech / Off Topic 6 March 16th, 2009 12:46
Million Post March. When will NAXJA reach 1 million posts? Glenn B Non-Tech / Off Topic 12213 October 2nd, 2006 11:22
Wall street wiz claims to be time-traveler, turned 800$ to 350 million in 2 wks... Safari Ary Non-Tech / Off Topic 15 October 2nd, 2006 07:16
So what was Discussed Scott Mac Midwest Chapter 9 March 4th, 2004 10:00


All times are GMT -7. The time now is 23:05.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014