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Author Topic: A/C which is the high side and which is the low?  (Read 8310 times)

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Offline madmax4x4

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A/C which is the high side and which is the low?
« on: May 05, 2015, 03:47:38 PM »
I've looked in the eaglepedia and Chilton but don't see which side is the low side? Also does anyone know the specific r12 to R134a retrofit service port adapter part number? I have purchased two sets on could only get the two larger high side ports to fit.
Is the low side on the left?

Offline rollguy

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Re: A/C which is the high side and which is the low?
« Reply #1 on: May 05, 2015, 05:33:43 PM »
There should be an "S" and "D" (suction and discharge) on the compressor head (rear).  The suction is the low side, discharge is the high side.
1980 Eagle Turbodiesel Wagon (only 2 known to exist as of 2008)- 7-7-2011 Flight to it's new nest @ Rambler Ranch
1983 Eagle Wagon  Tan over Copper
1982 Eagle SX4 "ALTREGL"  (avatar photo)
1982 Eagle 4 Door Sedan  Copper over Satin Black
1985 Eagle Sport Wagon October 2007 ROTM (SOLD)
4 Biofuel powered Benzs ('98 E300, '82 300 CD, '82 300 TD (wagon), '80 240 D)
1983 GMC Van (6.2 Diesel)
1985 Mitsubishi pickup (2.3 Turbodiesel)

Offline eaglefreek

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Re: A/C which is the high side and which is the low?
« Reply #2 on: May 05, 2015, 06:00:08 PM »
I'm pretty sure the one on the right is the low side.
1986 AMC Eagle Wagon 4.2L/4.0L head, AW4,NP242, Chrysler 8.25" rear.
1981 AMC Eagle Wagon As Seen On TV  Lost In Transmission


 

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Offline rollguy

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Re: A/C which is the high side and which is the low?
« Reply #3 on: May 05, 2015, 06:44:10 PM »
I'm pretty sure the one on the right is the low side.

The low side is usually the side with the larger hose.
1980 Eagle Turbodiesel Wagon (only 2 known to exist as of 2008)- 7-7-2011 Flight to it's new nest @ Rambler Ranch
1983 Eagle Wagon  Tan over Copper
1982 Eagle SX4 "ALTREGL"  (avatar photo)
1982 Eagle 4 Door Sedan  Copper over Satin Black
1985 Eagle Sport Wagon October 2007 ROTM (SOLD)
4 Biofuel powered Benzs ('98 E300, '82 300 CD, '82 300 TD (wagon), '80 240 D)
1983 GMC Van (6.2 Diesel)
1985 Mitsubishi pickup (2.3 Turbodiesel)

Offline carnuck

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Re: A/C which is the high side and which is the low?
« Reply #4 on: May 05, 2015, 08:41:51 PM »
It will also have a low pressure switch on one of the lines.
AMC/Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental!

Offline madmax4x4

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Re: A/C which is the high side and which is the low?
« Reply #5 on: May 07, 2015, 01:49:37 PM »
Dis and suc was marked on the back. It's the hose on the right side. Still didn't find a low side adapter that would fit so I put the large high side port on both side and switched the coupling on the charging hose. Got it filled but only took the one can 12oz I think to read in the green.

Offline captspillane

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Re: A/C which is the high side and which is the low?
« Reply #6 on: May 07, 2015, 07:34:05 PM »
Did you replace the canister? It is supposed to collect oil there and supposedly switching from R12 to R134a will ruin your compressor if you do not replace that at the same time. Its important to get nearly all of the old oil out before putting in the new because they are not compatible together.
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Offline carnuck

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Re: A/C which is the high side and which is the low?
« Reply #7 on: May 07, 2015, 11:49:40 PM »
There is a new synthetic oil that is compatible. It's been a couple years since I did my last AC car. (works fine in my wagon AFAIK)
AMC/Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental!

Offline madmax4x4

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Re: A/C which is the high side and which is the low?
« Reply #8 on: May 08, 2015, 02:16:59 AM »
I had r134 in long ago but I'm not sure if that was done. Hope it's not too late to do it now. Going to order a new drier and take it to a place that will flush and fill it again.

Offline rollguy

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Re: A/C which is the high side and which is the low?
« Reply #9 on: May 08, 2015, 11:21:27 AM »
I had r134 in long ago but I'm not sure if that was done. Hope it's not too late to do it now. Going to order a new drier and take it to a place that will flush and fill it again.
I have much experience with A/C, and especially with the Sanden compressors. 
Flushing is easy to do.  The A/C flush solvent is available at most auto parts stores.  Do NOT flush the compressor!  It is best to remove the compressor and turn it upside-down with the fill plug off to drain the oil. Also, turn it on it's end to get any oil out of the head (rear of the compressor).  Re-mount the compressor and then add PAG oil for 134a, or Mineral oil for R12.   You can also use ester oil, which is compatible with either refrigerant.  It usually takes about 8oz of oil total for the system.  I like to add 6oz of oil to the compressor, and the rest in the system during the charge process (A/C machine).   Flush all the hoses, condenser, and evaporator until clear liquid comes out.  It is suggested that you use a dry gas the last thing, but shop air will work first.  Shop air could have some moisture in it, so blowing out with dry gas just before hooking everything up gets most, if not all the moisture out.  If you are going to charge the system right away, uncap and hook up the drier LAST.  Pull a deep vacuum, and inject the remaining oil during the charge process.  Good luck, Rich
1980 Eagle Turbodiesel Wagon (only 2 known to exist as of 2008)- 7-7-2011 Flight to it's new nest @ Rambler Ranch
1983 Eagle Wagon  Tan over Copper
1982 Eagle SX4 "ALTREGL"  (avatar photo)
1982 Eagle 4 Door Sedan  Copper over Satin Black
1985 Eagle Sport Wagon October 2007 ROTM (SOLD)
4 Biofuel powered Benzs ('98 E300, '82 300 CD, '82 300 TD (wagon), '80 240 D)
1983 GMC Van (6.2 Diesel)
1985 Mitsubishi pickup (2.3 Turbodiesel)

Offline rollguy

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Re: A/C which is the high side and which is the low?
« Reply #10 on: May 08, 2015, 11:24:34 AM »
Oh yes, don't forget to check for leaks before and after charging!   I use nitrogen (same dry gas used for flushing) and soapy water before, and an electronic leak detector after.  If dye is used as well, ultra-violet light and glasses can be used....Rich
1980 Eagle Turbodiesel Wagon (only 2 known to exist as of 2008)- 7-7-2011 Flight to it's new nest @ Rambler Ranch
1983 Eagle Wagon  Tan over Copper
1982 Eagle SX4 "ALTREGL"  (avatar photo)
1982 Eagle 4 Door Sedan  Copper over Satin Black
1985 Eagle Sport Wagon October 2007 ROTM (SOLD)
4 Biofuel powered Benzs ('98 E300, '82 300 CD, '82 300 TD (wagon), '80 240 D)
1983 GMC Van (6.2 Diesel)
1985 Mitsubishi pickup (2.3 Turbodiesel)

Offline madmax4x4

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Re: A/C which is the high side and which is the low?
« Reply #11 on: May 09, 2015, 03:50:45 PM »
I had r134 in long ago but I'm not sure if that was done. Hope it's not too late to do it now. Going to order a new drier and take it to a place that will flush and fill it again.
I have much experience with A/C, and especially with the Sanden compressors. 
Flushing is easy to do.  The A/C flush solvent is available at most auto parts stores.  Do NOT flush the compressor!  It is best to remove the compressor and turn it upside-down with the fill plug off to drain the oil. Also, turn it on it's end to get any oil out of the head (rear of the compressor).  Re-mount the compressor and then add PAG oil for 134a, or Mineral oil for R12.   You can also use ester oil, which is compatible with either refrigerant.  It usually takes about 8oz of oil total for the system.  I like to add 6oz of oil to the compressor, and the rest in the system during the charge process (A/C machine).   Flush all the hoses, condenser, and evaporator until clear liquid comes out.  It is suggested that you use a dry gas the last thing, but shop air will work first.  Shop air could have some moisture in it, so blowing out with dry gas just before hooking everything up gets most, if not all the moisture out.  If you are going to charge the system right away, uncap and hook up the drier LAST.  Pull a deep vacuum, and inject the remaining oil during the charge process.  Good luck, Rich

Sounds like a pian. What does a shop usually charge to do this?   

Offline eaglefreek

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Re: A/C which is the high side and which is the low?
« Reply #12 on: May 09, 2015, 04:24:00 PM »
If you have a mixture of R12 and 134 in your system, it might be hard to find a shop that will want to hook it to their machine. If you don't tell them and they find out later, they will most likely be pretty upset.
1986 AMC Eagle Wagon 4.2L/4.0L head, AW4,NP242, Chrysler 8.25" rear.
1981 AMC Eagle Wagon As Seen On TV  Lost In Transmission


 

"I know he'd be a poorer man, if he never saw an eagle fly,
Rocky mountain high"  John Denver
Click for Fayetteville,TN Forecast" border="0" height="100" width="150

Offline madmax4x4

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Re: A/C which is the high side and which is the low?
« Reply #13 on: May 29, 2015, 09:38:03 AM »
I want to get a new drier but even napa says they can't get one. It is factory air. Auto zone had one listed but when you try to check out they can't get it either. Haven't checked eBay get but I usually get the wrong thing with I go with eBay.

Anyone know where they still have the driers?

Offline rollguy

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Re: A/C which is the high side and which is the low?
« Reply #14 on: May 29, 2015, 10:24:13 AM »
You may have to retrofit a universal drier with new hoses/fittings.  Universal driers come with either flare or Oring type fittings (#6), and are less than $20.  Most A/C shops can retrofit one for you.
1980 Eagle Turbodiesel Wagon (only 2 known to exist as of 2008)- 7-7-2011 Flight to it's new nest @ Rambler Ranch
1983 Eagle Wagon  Tan over Copper
1982 Eagle SX4 "ALTREGL"  (avatar photo)
1982 Eagle 4 Door Sedan  Copper over Satin Black
1985 Eagle Sport Wagon October 2007 ROTM (SOLD)
4 Biofuel powered Benzs ('98 E300, '82 300 CD, '82 300 TD (wagon), '80 240 D)
1983 GMC Van (6.2 Diesel)
1985 Mitsubishi pickup (2.3 Turbodiesel)

Offline carnuck

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Re: A/C which is the high side and which is the low?
« Reply #15 on: May 31, 2015, 09:57:44 PM »
Rockauto.com has 3 left.  Different years may be different.

I just chose '81 Eagle with 4.2L

A/C Filter Dryer for factory AC
Part Number: TEM 208425

Dealer installed AC
A/C Filter Dryer
Part Number: TEM 208317
« Last Edit: May 31, 2015, 10:15:40 PM by carnuck »
AMC/Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental!

Offline madmax4x4

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Re: A/C which is the high side and which is the low?
« Reply #16 on: September 20, 2015, 02:54:20 PM »
Got a new drier but can not get it un hooked from the condenser  :banghead: I've been putting break free on and off for weeks. It doesn't look like it's coming off without breaking the condenser. Anyone know of a good universal one that will match up. The one specific of the eagle is like $300  :help:

ETA: right after typing this I tried again and got it unhooked. Hopefully the condenser is still good. :hello2:
« Last Edit: September 20, 2015, 04:26:01 PM by madmax4x4 »

 

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