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
  #1  
Old June 8th, 2018, 14:11
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Member
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 567
Evaporator core, pulling dash?s

I've been reading the service manual asks to remove way to much, and this job can be done by pulling the dash away enough to get the hvac box out. True?

Also I read a flexhead 11mm wrench is helpful though I can't find one anywhere. Can I work around this with sockets/ swivel heads?

Other than time is there anything special I'll need that I'm missing? The ac is already discharged.


Thank you for your insight

Last edited by 4x4JeePmaNthINg; June 8th, 2018 at 14:32.
Reply With Quote
  #2  
Old June 8th, 2018, 16:17
Ralph77 Ralph77 is offline
NAXJA Forum User
 
Join Date: Dec 2015
Location: East Coast
Posts: 249
Re: Evaporator core, pulling dash?s

Seems like many do it with just pulling the passenger side away. Not taking it completely off. As far as the flexhead goes:

https://www.amazon.com/GearWrench-Fl.../dp/B0002SR04O
Reply With Quote
  #3  
Old June 8th, 2018, 21:00
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Member
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 567
Re: Evaporator core, pulling dash?s

Dash is out but I'm stuck on what's holding the box in, I need someone that knows haha, I would be done by now if I could just get the box out

Nm got it finally

Last edited by 4x4JeePmaNthINg; June 8th, 2018 at 23:26.
Reply With Quote
  #4  
Old June 9th, 2018, 12:30
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Member
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 567
Re: Evaporator core, pulling dash?s

Can AC be fully recharged with canisters?
Reply With Quote
  #5  
Old June 9th, 2018, 13:48
smccollamjr smccollamjr is offline
NAXJA Forum User
 
Join Date: Jul 2005
Location: WV
Posts: 397
Evaporator core, pulling dash?s

There are either nuts or bolts on the firewall side you have to remove.
Reply With Quote
  #6  
Old June 9th, 2018, 13:49
smccollamjr smccollamjr is offline
NAXJA Forum User
 
Join Date: Jul 2005
Location: WV
Posts: 397
Evaporator core, pulling dash?s

...it can be recharged by canisters but yo have to make sure you have the proper amount of oil in it.
Reply With Quote
  #7  
Old June 9th, 2018, 15:35
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Member
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 567
Re: Evaporator core, pulling dash?s

Any tips on getting the lines back onto the evaporator core?

The little one is fighting me pretty bad
Reply With Quote
  #8  
Old June 10th, 2018, 13:37
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Member
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 567
Re: Evaporator core, pulling dash?s

Well the lines are on. After fighting and pushing the hell out of them, they needed a lil love tap, and they clicked into place. Saaaweeet!
Time to recharge the AC, just rented a pump and gauges so this should be fun. I've never worked on the ac before.
Reply With Quote
  #9  
Old June 10th, 2018, 19:40
smccollamjr smccollamjr is offline
NAXJA Forum User
 
Join Date: Jul 2005
Location: WV
Posts: 397
Evaporator core, pulling dash?s

Did you put any oil on the o-rings?
Reply With Quote
  #10  
Old June 13th, 2018, 00:37
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Member
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 567
Re: Evaporator core, pulling dash?s

i did add some oil to the O rings. Im surprised it was that difficult to get back on.
I rented the proper gear and re charged the system.

this really isnt that big of a job as many make it seem to be, granted its time consuming, but rather easy and kinda neat to learn whats all under the dash. I would suggest Anyone that can change their oil to go for doing this yourself.
Reply With Quote
  #11  
Old June 15th, 2018, 07:00
gba88 gba88 is offline
NAXJA Forum User
 
Join Date: Sep 2004
Location: PA
Posts: 464
Re: Evaporator core, pulling dash?s

Quote:
Originally Posted by 4x4JeePmaNthINg View Post
i did add some oil to the O rings. Im surprised it was that difficult to get back on.
I rented the proper gear and re charged the system.

this really isnt that big of a job as many make it seem to be, granted its time consuming, but rather easy and kinda neat to learn whats all under the dash. I would suggest Anyone that can change their oil to go for doing this yourself.
TIME is the biggest issue with this job. Took me about 14 hours over two days on the one I did a few years back. If the heater core or evaporator go in my current 99, I doubt I'll be doing it again. Well, I say that but as long as I could find a ride to work, I'd probably tear it apart and go for it again

To anyone who does this... DO replace BOTH the heater core and evaporator while you are in there! Would be a real shame to go through all that to replace one or the other then have the other one fail! IIRC both parts are not that expensive either, so it just makes sense.
Reply With Quote
  #12  
Old June 15th, 2018, 12:17
kastein's Avatar
kastein kastein is offline
NAXJA Member
 
Join Date: Jul 2009
Location: Central MA - keep going till the road turns to dirt, then listen for banjos
Posts: 14,050
Re: Evaporator core, pulling dash?s

It only took me about 4 hours to do mine, but I've parted out enough XJs to know exactly which wrenches I needed for what. I'm not sure if you were reading something I wrote about that 11mm flex head, but that is in fact one of the recommended tools I generally list.

Did you replace the foam gaskets at the top of the HEVAC box and front where it seals to the firewall and plenum? If you didn't, good chance you will be enjoying a footwell full of rainwater every time you park nose-up in a rainstorm in the future, just warning you. Guess how I found out...

Normally if you discharge your AC system nicely, you don't need to add any oil except whatever was sitting in the evap core when you replaced it, and what was sitting in the receiver/dryer/accumulator, which is supposed to be replaced anytime you open the AC system. You can find estimates of how much oil to add for each of these parts online somewhere or other. Glad you are using a vacuum pump, a lot of people don't and it's not the right way to do AC work.

Other than that I have nothing of value to add that hasn't already been mentioned.
__________________
My yard looks like Sanford & Sons.
Please do not PM me about the AW4 info thread unless you have a truly unique question that is not covered by it or info to add. I do not respond to questions answered by the thread.
Definitely do not hunt down my phone number at 3AM, text me about it, and then threaten violence when I am not helpful. It will not get you what you want.
CTeunuch: Sometimes I really wonder if this sport makes you insane, or it just attracts the mentally unstable.
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
Changing evaporator core - thinking of reusing heater core jeepingben OEM Tech Discussion 6 March 29th, 2013 16:28
Evaporator core recommendations anthrax323 OEM Tech Discussion 5 January 7th, 2011 08:47
AC evaporator core diagnosis? XJ Eric OEM Tech Discussion 5 April 17th, 2008 05:57
Pulling Evaporator Coil off Accumulator & Condenser Lines RAVC1 OEM Tech Discussion 2 December 31st, 2006 15:28
Evaporator core aroberts OEM Tech Discussion 5 June 24th, 2005 07:40


All times are GMT -7. The time now is 23:07.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014