Quantcast Replacing the Evaporator and Heater Core - A Write Up - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles

Go Back JeepForum.com > Models > Jeep Cherokee & Comanche Forums > Cherokee Technical Forum > Replacing the Evaporator and Heater Core - A Write Up

RUBICON EXPRESS Lift Kits and Accessories Available at BasTruck-Lite's New LED Headlamp SeriesIntroducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Reply
Old 08-08-2008, 08:09 PM   #1
xjguy98
Registered User
1998 XJ Cherokee 
 
Join Date: Sep 2005
Location: Belleville, Ontario
Posts: 553
Replacing the Evaporator and Heater Core - A Write Up

Well......I'm past the point of no return. Picked up all the junk I needed this morning and got started around supper tonight. I'll post pictures tomorrow but it took me about three and a half hours and I finally got the dash out. Actually that's a lie, it's still connected by one of the big body connectors on the left hand side. I removed the big bolt but I can't seem to separate the two halves so I left it and kinda swung the entire dash out of the way. I think I might have a problem with the clockspring because when I removed the steering column, the wheel rotated a bit so we'll see.

Only snag I ran into other than the body connector was when I tried to remove the steering wheel, one of the bolt holes for the puller was stripped so I skipped that step and left the wheel on the column......didn't end up being an issue tonight but if my clockspring needs to be replaced......I might have problems. Also, when the dash was resting on the shifter, I guess the weight was too much and I broke my switch panel but that's not a big deal either cuz I plan on getting one with 3 or 4 holes instead of 2.....no biggie.

I'm sure with all the tugging at wire harness connectors and moving stuff around that when everything goes back together, some stuff might not work but not too much I can do about that now is there? I think for the most part, it went pretty smoothly (knock on wood) The temp control cable wouldn't come off the blend air door bellcrank so I just disconnected it from the control head.

SOOOOO for tomorrow, it's drain the coolant, open up some A/C lines and hopefully I'll have the HVAC box on the bench by lunchtime. My plan for tomorrow is to have the accumulator, heater core and evaporator replaced and the HVAC box reinstalled by the time it gets dark....unless it rains again then it might set things back. Oh yeah, if I have time I'm gonna replace the other o-rings in the system (compressor and condenser o-rings) I figure since I have the system drained anyway, it can't hurt. So, for tonight.....that's where I'm at......long job for sure but not too bad so far. Pics to follow.....

__________________
[SIZE="1"][CENTER]'98 XJ Sport, 4.0L, AW4, NP231, HP30/8.25"
3.5" RE Superflex, Full Leafs, OME's All Around, JKS Trackbar
31x10.5R15 Mickey Thompson Baja MTZ's on 15x8 Rockcrawler's (3.75" BS)
C4x4 Front Tow Hooks/Rear Hidden Hitch[/CENTER][/SIZE]
xjguy98 is offline   Reply With Quote
Old 08-09-2008, 09:57 AM   #2
xjguy98
Registered User
1998 XJ Cherokee 
 
Join Date: Sep 2005
Location: Belleville, Ontario
Posts: 553
Ok, so I started around 8 this morning, had a bit of trouble with the A/C lines and the heater hoses getting them disconnected but I managed to get the heater box removed as well as the accumulator. Threw the box on the bench and started to disassemble it. Got the two halves separated and removed the evaporator and heater core. Now for my question.....for those of you that have done this, what did you do with the chunk of foam that sits under the evaporator? Mine is in bad shape, the aft end is completely rotted away and the rest is all brittle and crumbly. Now I looked in the parts catalog and there is no such beast listed.....can I just turf it or is it required to control or block airflow around the box?
__________________
[SIZE="1"][CENTER]'98 XJ Sport, 4.0L, AW4, NP231, HP30/8.25"
3.5" RE Superflex, Full Leafs, OME's All Around, JKS Trackbar
31x10.5R15 Mickey Thompson Baja MTZ's on 15x8 Rockcrawler's (3.75" BS)
C4x4 Front Tow Hooks/Rear Hidden Hitch[/CENTER][/SIZE]
xjguy98 is offline   Reply With Quote
Old 08-09-2008, 02:26 PM   #3
AZ Jeff
Registered User
2000 XJ Cherokee 
 
Join Date: Sep 2005
Location: Gilbert, Arizona
Posts: 6,072
Quote:
Originally Posted by xjguy98 View Post
Ok, so I started around 8 this morning, had a bit of trouble with the A/C lines and the heater hoses getting them disconnected but I managed to get the heater box removed as well as the accumulator. Threw the box on the bench and started to disassemble it. Got the two halves separated and removed the evaporator and heater core. Now for my question.....for those of you that have done this, what did you do with the chunk of foam that sits under the evaporator? Mine is in bad shape, the aft end is completely rotted away and the rest is all brittle and crumbly. Now I looked in the parts catalog and there is no such beast listed.....can I just turf it or is it required to control or block airflow around the box?
Its required to block airflow. Piece of closed-cell polyethylene foam (like in pool "noodles") is a good substitute.
__________________
AZ-Jeff
1992 XJ 2" lift -- RIP
2000 XJ 3" lift -- Australian Ford Big Brakes up front, rock rails, ZJ rear discs (with WORKING parking brake), C4x4 rear bumper/tire carrier, Hella H4 headlights, IPF driving lights, OEM skid plates, OME springs/shocks, JKS LCA's, JKS Sway Bar links.
AZ Jeff is offline   Reply With Quote
Old 08-09-2008, 04:10 PM   #4
Gary2
Web Wheeler
 
Gary2's Avatar
1999 TJ Wrangler 
 
Join Date: Sep 2004
Location: South Jersey
Posts: 1,305
sounds like the same set up thats in the Dodge trucks . What I did was use weather striping with adheasive on one side that way it would stay where I put it .
__________________
99 TJ Clayton long arms, 35" Maxxis MT , 2.5" RC+ spacer , 1" bl , 1" mml , Superwinch EPI9S SYE FREE GIFT FROM AA, Black Magic pads EBC rears,Rancho 9000XL ,AEV lower shock brackets ,8.8" rear, Anti-rock , Currie steering , PSC box & Pump, JKS TB , Alpine hu,amp
Gary2 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads




Glock Forum



Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.

Copyright © Group Builder, Inc - All Rights Reserved