Dam Heater Core !!! - JeepForum.com
LinkBack Thread Tools
post #1 of 4 Old 06-18-2007, 10:47 PM Thread Starter
Registered User
Join Date: Oct 2006
Location: Phoenix
Posts: 69
Dam Heater Core !!!

how big of a pain is it to change the heater core for a yj. so here is the story i was driving stopped to get gas and a ***** load of water was comming out of my passanger side firewall.so is it tough to replace its a 88 jeep wrangler 4.2 inline 6

pelos is offline  
Sponsored Links
post #2 of 4 Old 06-19-2007, 12:39 AM
Registered User
sofixj's Avatar
2006 TJ Wrangler 
Join Date: Sep 2005
Location: NJ
Posts: 359
had posted this before and got flamed, so I deleted it. I figured at the time, I was either going to get a "cool, that will help" or "what an idiot response" After someone else started a whole new thread on "How i do chang a heter", complete with "i dont now, me get my bok"responses, I figured it might be a little too low tech.
However, since a couple of people PM'd me, we have some newbies out there, and a few who are freezing their butts off and want to change out their heater core with as few surprises as possible, I'll put it back up. I am happy to report my skin is a little thicker now! HTH.

Not a very exciting mod, but cooler than a passenger floorboard full of antifreeze or freezing your ***** off. Below are the steps to help speed up the process.

1. Drain Coolant (even if you are only changing the motor. The whole assembly has to come out)
2. Disconnect heater hoses
3. Disconnect vent door cables (3 of them. Two in front, one on the side of the housing between said housing and body. One below passenger side speaker. (Unscrew the nut and slide the whole thing off each shaft.)
4. Disconnect blower motor wire. (On top of housing, center, 2 blade plug.)
5. Disconnect defroster duct. (I just loosened up the bottom clamp and removed it after the housing was out of the way.)
6. Remove nuts that attach heater housing studs to the engine compartment side of the dash panel. (This is where the pictures might help out.)

First off, remove the Battery and tray. There are four studs that hold it to the firewall, and two that attach it to the fender that are all 1/2 inch. The fuse box can be removed from the battery tray without disconnecting any wires. Three of the bolts are under the tray, and one is behind the valve cover, on the driver side. All of the nuts are the same size, 7/16. See pics.

7. Remove heater housing assembly by tiling it downward, to disengage it from the defroster duct. Pull it rearward and out from under the instrument panel.
Attached Images

l_--- \___l---[]lllllll[] _
_(o)_)___(o)_)--o-)_) only in a JEEP
sofixj is offline  
post #3 of 4 Old 06-19-2007, 11:01 AM
Registered User
timatoe's Avatar
1990 YJ Wrangler 
Join Date: Aug 2006
Location: Grass Valley
Posts: 17,500
Yep, that'll about cover it. Try searching as well there is a post out there with fairly detailed pics, it's for changing the blower motor, but it's all in the same assembly anyhow.

Originally Posted by George Orwell
We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm.
timatoe is offline  
post #4 of 4 Old 06-19-2007, 11:08 AM
Got my eye on you.....
rustywrangler's Avatar
Join Date: Apr 2005
Location: Syracuse, NY
Posts: 18,613
Sounds like all the info is there for ya.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Congenital Heart Disease is a reality for me, BOTH of my children have it. Please read up and become aware for future generations

Lydia Ann-Acquired 08/05/05 Open Heart surgery 08/10/05
Jacob Patrick-Acquired 01/17/08 Open Heart surgery 02/15/08
rustywrangler is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
YJ Heater Core and Heater Motor Replacement?? Boston Mangler YJ Wrangler Technical Forum 11 11-29-2009 09:31 AM
heater core lilmike386 YJ Wrangler Technical Forum 2 08-24-2009 08:03 AM
Heater Core (I think) DrumBat YJ Wrangler Technical Forum 8 08-05-2009 03:18 AM
Heater core. jaminb YJ Wrangler Technical Forum 5 12-04-2007 03:22 PM
heater core O2BTOM TJ Wrangler Technical Forum 4 11-10-2006 10:41 AM

Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome