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  #41  
Old 06-20-2019, 09:47 AM
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Beach_Dude Beach_Dude is offline
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Did that work?
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1977 Jeep Cherokee Chief
360 w/ MC 4350
Modified header exhaust w/ported AIR Injection
Slightly modified suspection
Original paint, garaged/non-op for over 15 years
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  #42  
Old 06-20-2019, 10:11 AM
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I can see photos.
dave in NC
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1976 J-10 HONCHO Fleetside
1982 J-10 Fleetside
1988 grand wagoneer
2004 RUBICON jeep
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  #43  
Old 06-20-2019, 11:52 AM
SJTD SJTD is offline
350 Buick
 
Join Date: Apr 26, 2012
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I sees them now.
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'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.
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  #44  
Old 06-20-2019, 12:06 PM
SJTD SJTD is offline
350 Buick
 
Join Date: Apr 26, 2012
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I've had the AC from my '84 removed and sitting on the bench for a couple years so I took a look at it. On mine that side port on the return side of the evaporator has.... no shrader.

Looks like you may have figured it out.

I don't recall the whole story here but did any professional do any of the installation on this or was it all you? If you paid someone seems like he owes you a lot of money.
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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.

Last edited by SJTD : 06-20-2019 at 12:12 PM.
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  #45  
Old 06-20-2019, 05:33 PM
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A good AC tech should have figured this out.
How many times did you pay to have it charged?
Something like that should have never gone out the door if a "shop" was charging the system.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #46  
Old 06-20-2019, 08:50 PM
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Beach_Dude Beach_Dude is offline
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Running like a charm! There's got to be a method or a warning to those that are replacing their evaporator core to remove the valve if their using a factory ac, and to cap off the Schrader if they have dealer installed ac.

As for the labor, I'm the guy that did all the tear down and rebuilding. Following tsm and every bit of literature to a t did not prevent this from happening.

As for the shops that charged, I was always told that there was a clog in the system and did the work myself.

I've driven it all day and the AC blows like a dream!

I'll update you guys in a few days... Usually my system would crap out after two or so days.
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1977 Jeep Cherokee Chief
360 w/ MC 4350
Modified header exhaust w/ported AIR Injection
Slightly modified suspection
Original paint, garaged/non-op for over 15 years

Last edited by Beach_Dude : 06-20-2019 at 10:29 PM.
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  #47  
Old 06-21-2019, 01:12 AM
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FSJunkie FSJunkie is offline
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Join Date: Jan 09, 2011
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Yeah, that would do it. Having the Schrader valve in there wouldn't be a problem if the equalization tube had a depressor inside it to open the valve, but it doesn't.

The new evaporators probably have the Schrader valve so they can be used on systems with and without the equalization tube. Many expansion valves are internally equalized. Once again, "universal and fits all" screws us. Always have to be diligent about new parts. That's why I reuse original for as long as possible.

Isn't it amazing how cold the vent air is when the expansion valve delivers the correct amount of refrigerant? You'd think more refrigerant would make the vent air colder, but it does the opposite. It makes for barely cool vent air while it freezes the crap out of the suction line and compressor, eventually destroying the compressor. Too little refrigerant cools poorly too. It has to be just right. That's the expansion valve's job. If your suction line to the compressor is cold enough to condense water but not freeze it, your refrigerant flow is just right.

A LOT of people are having this problem of poor cooling and ruining compressors, but many simply write it off as "old car A/C".
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  #48  
Old 06-21-2019, 09:39 AM
SJTD SJTD is offline
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Join Date: Apr 26, 2012
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Or that lousy 134a stuff.
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'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.
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  #49  
Old 06-21-2019, 11:12 PM
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Beach_Dude Beach_Dude is offline
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Join Date: Mar 03, 2011
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Talking

Drove it on the freeway at 70mph and DA-HAM is that cold!!!

My girlfriend was freaking out saying it felt like a freezer being opened.

Just a little happy right now.
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1977 Jeep Cherokee Chief
360 w/ MC 4350
Modified header exhaust w/ported AIR Injection
Slightly modified suspection
Original paint, garaged/non-op for over 15 years
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  #50  
Old 06-28-2019, 09:17 PM
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Beach_Dude Beach_Dude is offline
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So, that's it, guys. I've been driving the General around for days and still blowing cold!!!

The only leak I have going is the evaperator coil, which SUCKS, because I don't want to have to drop the evaporator housing again. Also a brand new part.

A final piece of advice that I can give anybody is to buy a Freon sniffer off Amazon. Cost less than $30, and saves that price of freon alone for having to tighten all the leaks.

the prevention of this system like the back of my hand, so if anybody has any questions, feel free to reach out!!!!

Also, if you're in the Orange county LA area, and want to get your Freon pumped, reach out. I've got the equipment.
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1977 Jeep Cherokee Chief
360 w/ MC 4350
Modified header exhaust w/ported AIR Injection
Slightly modified suspection
Original paint, garaged/non-op for over 15 years
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  #51  
Old 06-29-2019, 02:03 AM
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FSJunkie FSJunkie is offline
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Join Date: Jan 09, 2011
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I wouldn't spread that information around if I were you.

The EPA on a federal level is really cracking down on DIY air condition service. It's now illegal to buy more than a couple cans of refrigerant at a time, including a 30 pound drum, without a 609 certification, and any retailer who sells it to a person without certification is subject to a $44,000 fine. Retailers must photocopy the purchaser's certification and keep it on file in case of an EPA audit.

I know because I am a retailer.

The EPA has their goon squad out sniffing for people like you who might be servicing their own A/C without certification or without a proper recovery machine.

It blows chunks...hard.
--------------------------

On a side note: yes, a proper functioning A/C system on these Jeeps works very well. It's a 2-ton refrigeration unit, which is about the same refrigeration capacity as a residential A/C system for a 1400 square foot house. That was standard for most cars back then, including all AMC cars. If you think that system does a good job of keeping your Jeep station wagon cold, you should try it in a little AMC Gremlin or Hornet with 20% tint on all windows like my Hornet is. I can freeze myself out of that little car. I used to drive it in Phoenix on 110 degree days with it 75 degrees inside the car...with R134a.

They just don't work well at idle or if your windows are not tinted. The large interior volume of a Jeep doesn't help.
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Last edited by FSJunkie : 06-29-2019 at 02:13 AM.
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  #52  
Old 06-29-2019, 08:59 AM
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Beach_Dude Beach_Dude is offline
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Cool

I got my 609 online.
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1977 Jeep Cherokee Chief
360 w/ MC 4350
Modified header exhaust w/ported AIR Injection
Slightly modified suspection
Original paint, garaged/non-op for over 15 years
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