Help how do I remove a core from 79 Cherokee

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79 Chief
Posts: 6
Joined: Sat Dec 29, 2018 12:51 pm

Help how do I remove a core from 79 Cherokee

Postby 79 Chief » Sat Dec 29, 2018 4:35 pm

Hello. I have a 79 Jeep Cherokee Chief. I converted it to a GM 350 and I need to pull the ac lines out to get them modified for the new GM compressor. How do I remove the compressor lines from inside the car :fsj:
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:evil:

SJTD
Posts: 1130
Joined: Tue May 21, 2013 12:02 pm
Location: Lompoc, Sunland or somewhere between

Re: Help how do I remove a core from 79 Cherokee

Postby SJTD » Sat Dec 29, 2018 10:41 pm

Been a long time since I removed mine but I think you have to drop the whole evaporator assembly. Hope you're making new hoses after having to do all this work to remove them, not just putting on new fittings. It'd be a good time to clean the evaporator fins and flush it to get the old out oil for converting to 134a.

Maybe a new expansion valve or whatever it's called on these systems.
Sic friatur crustulum

'84 GW with Nissan SD33T, early Chev NV4500, 300, narrowed Ford reverse 44, narrowed Ford 60, SOA/reversed shackle in fornt, lowered mount/flipped shackle in rear.

79 Chief
Posts: 6
Joined: Sat Dec 29, 2018 12:51 pm

Re: Help how do I remove a core from 79 Cherokee

Postby 79 Chief » Sun Dec 30, 2018 10:04 am

No I'm replacing them
:evil:

1979bettywhite
Posts: 471
Joined: Tue Jul 25, 2017 8:14 am

Re: Help how do I remove a core from 79 Cherokee

Postby 1979bettywhite » Wed Jan 02, 2019 9:56 am

STJD is right. If you still have the stock below dash A/C unit, you can drop it down. There is a rubber plug that the lines route through the firewall to the engine bay. If you have the lines disconnected from the stock compressor (or cut), you should be able to pull enough slack to get wrenches on the evaporator core to remove the lines.

Word of advice though, if you already have the lines disconnected (or cut) from the compressor, go ahead and pull the whole A/C box out. Then get two wrenches to put on both nuts. Evaporator core side, and line side. You may need to use penetrating oil for a couple days to be able to disconnect them. I am saying all of this assuming that you are planning to re-use the stock A/C box as well as the evaporator core. If you are, then you will need to be careful disconnecting the lines - one for safety of damaging the original A/C box, and two for damaging the evaporator core. Odds are these connections have not been apart in many many years.

I just went through all of this with my system. Wanted to keep the stock look with new components. All new lines, sanden compressor, new dryer and evaporator core and condenser pressure tested. Have had my A/C box out more times than wanted in a lifetime, lol. This will be a good time to inspect your A/C box as well for cracks etc. and fill/repair them as needed.

Let me know if you need more info as I am too familiar with this system after having it out multiple times, lol. But I do have cold A/C!

MReese Wagoneer
Posts: 15
Joined: Wed Apr 10, 2019 8:14 am
Location: St Louis, MO

Re: Help how do I remove a core from 79 Cherokee

Postby MReese Wagoneer » Fri Apr 19, 2019 9:03 am

Gonna hi jack for a minute!
Is there a good site or article for a system upgrade ?
Just bought 83 Brougham and the A/C is dead, new more efficient compressor is always good !
:fsj:
New 83 Wagoneer Brougham
old 99 Grand Cherokee Limited
http://www.amsoil.com/index.aspx?zo=1848854

1979bettywhite
Posts: 471
Joined: Tue Jul 25, 2017 8:14 am

Re: Help how do I remove a core from 79 Cherokee

Postby 1979bettywhite » Mon Apr 22, 2019 2:07 pm

Some have used a Vintage Air system, but there is by no means a direct application. You have to retrofit one in like shown here:

http://ifsja.org/forums/vb/showthread.php?t=176478


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