Replaced Heater Core - JeepForum.com
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post #1 of 21 Old 12-08-2019, 04:29 AM Thread Starter
hdsport
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Replaced Heater Core

My 2005 TJ. 105,000 mi.

Have been smelling anti-freeze when the heater was on for a while.
Windows began to get foggy when it was cold out.

Finally began to drip out of the drain tube from the heater box that exits out of the firewall.
So, time to replace the Heater core.
Was NOT looking forward to doing this but it had to be done.

It took 2 of us about 4-5 hrs to complete the job.
But, we wern't in a hurry, either.

Flushed out the box and scrubbed it clean of all residue.
Cleaned the AC core also.
Found a little debris in the bottom of the box.

Now all is back to normal.
NOT a job that I would want to do again.
Attached are some photos of the leaking heater core.

Attached Thumbnails
20191207_084443.jpg   20191207_084503.jpg   20191207_084506.jpg   20191207_084511.jpg  
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post #2 of 21 Old 12-08-2019, 07:01 AM
jay-h
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I cannot understand why manufacturers bury heater cores in such hard to reach places (and your TJ is not nearly as 'bad' as most other vehicles). It's a part that can and does fail.

The engineers should be forced to do a core change.
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post #3 of 21 Old 12-08-2019, 07:03 AM Thread Starter
hdsport
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Quote:
Originally Posted by jay-h View Post
I cannot understand why manufacturers bury heater cores in such hard to reach places (and your TJ is not nearly as 'bad' as most other vehicles). It's a part that can and does fail.

The engineers should be forced to do a core change.
Yes, never looked at it that way.
Maybe a little time on their back removing the steering wheel would change one's perspective.
Thank You.

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post #4 of 21 Old 12-08-2019, 07:15 AM
TJKTodd
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Nicely done! The advantage of doing it your self is that you will take the extra time to clean the box out and clean the AC core too. I would venture to guess that shops that pay mechics a per piece rate would never touch those items as it would basically be him paying for the "extra" labor it takes. But when I just did mine a few weeks ago I did the same and my AC Coil was so dirty half of the fins were clogged with dust and debris, I'm glad I did, I bet my AC will work a ton better next summer

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post #5 of 21 Old 12-08-2019, 07:39 AM
BlueFl.Wrangler
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Wow

Thats a big job- your obviously good to tackle such a big job as that
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post #6 of 21 Old 12-08-2019, 08:09 AM
40vern
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i have done three this year. the tjs are allot easier that the xjs. i did my tj this week. was not that bad of a job. i also wanted to add ac. it did not have ac on it. i also noticed my havac box did not have one of the doors. it was use solid piece of plastic. so i took a dreamel took and cut little squares out. i added the vaccume pump and the vacume hose too. hope all of this works
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post #7 of 21 Old 12-08-2019, 03:54 PM
TJTurbo
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Quote:
Originally Posted by jay-h View Post
I cannot understand why manufacturers bury heater cores in such hard to reach places (and your TJ is not nearly as 'bad' as most other vehicles). It's a part that can and does fail.



The engineers should be forced to do a core change.
My theory is at the factory they start with the heater core and then assemble the rest of the vehicle around said heater core.

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post #8 of 21 Old 12-08-2019, 07:22 PM
jay-h
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Quote:
Originally Posted by 40vern View Post
i have done three this year. the tjs are allot easier that the xjs. i did my tj this week. was not that bad of a job. i also wanted to add ac. it did not have ac on it. i also noticed my havac box did not have one of the doors. it was use solid piece of plastic. so i took a dreamel took and cut little squares out. i added the vaccume pump and the vacume hose too. hope all of this works

the older the better. I did the core on my non AC YJ. Had to remove the battery, unbolt from the firewall and remove the heater assembly from under the dash. Unfortunately no vehicle is that simple now.

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post #9 of 21 Old 12-09-2019, 09:38 AM
BlueFl.Wrangler
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I saw a YT video that shows practically a step by step, bolt by bolt , plug by plug-- and I dont think I could do all that. I have a lot of respect for you folks that will tackle these types of jobs. Wish one of you live near me!! I am just to damn old to do this
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post #10 of 21 Old 12-09-2019, 10:51 AM
40vern
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tj

on the tj, you can get away with out have ing to remove the whole dash. it is not really that difficult

my thing that i really wonder about is the medal frame that the plastic part of the frame bolts too.

i am using the body from a stock 4 cylinder and the frame and motor from a 4.0

the stock 4 cylinder had a dash frame that is medal unpainted and rusty

the 4.0 had a dash frame that looks silver like galvanize medal.

so while i had my dash out i am using all the nice stuff from the 4.0. like the intermitten or what ever lol wiper controler. the strreing column that had the tilt. the steering wheel that has the control for cruse control.

i also noticed that if your jeep does not come with tilt steering wheel. the major parts are their. you just have to get the cable the handle and the plastic that raps around the column. very simple
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post #11 of 21 Old 12-10-2019, 05:29 PM
willis36
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Which replacement heater core did you go with? The one for my TJ is long discontinued and I am scared of installing aftermarket one, but I dont really have much choice
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post #12 of 21 Old 12-10-2019, 05:51 PM
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Since I'll never part with my TJ, looks like an exciting, and fun filled weeklong project!


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post #13 of 21 Old 12-10-2019, 05:52 PM
TJKTodd
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If you have an 03 to 06 they are still available from Mopar (Amazon or online) your stock one lasted at least 13 years so best to go back with OEM it's not a job u want to do often ie life time warranty only means how many times in your lifetime do u want to change it lol not bad it's a starter or alternator but heater core is a bit more hands on.

if you have a 97-02 get this one https://www.superiorcooling.co...oma...-wrangler.html

OEM Mopar is discontinued and this

It's the only copper one available.

It's a awesome little company that makes big industrial AC parts but made this just for us TJ guys needing a high quality replacement again a job u don't want to do often!

Good luck if you have any questions I'm here to help

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post #14 of 21 Old 12-10-2019, 05:54 PM
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Quote:
Originally Posted by willis36 View Post
Which replacement heater core did you go with? The one for my TJ is long discontinued and I am scared of installing aftermarket one, but I dont really have much choice
I put in a NAPA unit number of years ago. No complaints. It's aluminum, not brass but seems to do the job ok.

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post #15 of 21 Old 12-10-2019, 06:02 PM
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Quote:
Originally Posted by TJKTodd View Post
If you have an 03 to 06 they are still available from Mopar (Amazon or online) your stock one lasted at least 13 years so best to go back with OEM it's not a job u want to do often ie life time warranty only means how many times in your lifetime do u want to change it lol not bad it's a starter or alternator but heater core is a bit more hands on.
For my '06, says it's part #5073180AB.

Yikes! Amazon wants $243. Searching for other sellers...

Looks like this is another part that I should stock...

EDIT: $211
https://www.moparamerica.com/oem-par...core-5073180ab


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