I managed to wrap the TXV sensing bulb with a layer of insulation tape (aka cork tape or prestite tape). The insulation prevents the TXV from responding to engine bay and fan-wash temperatures.
http://cjnn.xtremefabricator.com/images/LY6swap/ly6swap1476.jpg
http://cjnn.xtremefabricator.com ...
Search found 28 matches
- Wed Oct 17, 2018 10:23 am
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
- Mon Oct 01, 2018 9:51 am
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
Thank you Dougflas. Yes my 1970 factory AC system did call for 11oz of mineral oil. The OE application for the compressor (2007+ Silverado) I'm using calls for 8oz of PAG46. Since this is a hybrid system, I'm not sure how much to use.
Here are some considerations:
Evaporator - OE 1970 unsure ...
Here are some considerations:
Evaporator - OE 1970 unsure ...
- Wed Sep 26, 2018 10:19 am
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
I decided to get back to work on the AC project.
Here is my to do list:
- Adjust POA valve
- Flush evaporator and POA valve
- Install o-rings throughout
- Install hi pressure switch
- Add PAG oil
- Wire compressor and fan relay
- Install compressor belt
- Evacuate and charge
Starting with the POA ...
Here is my to do list:
- Adjust POA valve
- Flush evaporator and POA valve
- Install o-rings throughout
- Install hi pressure switch
- Add PAG oil
- Wire compressor and fan relay
- Install compressor belt
- Evacuate and charge
Starting with the POA ...
- Mon Aug 27, 2018 9:02 am
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
Hose Crimping
This weekend I borrowed a Mastercool 71550 AC hose crimper and made all the hoses for the system. Here's what a typical fitting looks like coming out of the tool:
http://cjnn.xtremefabricator.com/images/LY6swap/ly6swap1438.jpg
This tool is very simple to operate. It comes with ...
This weekend I borrowed a Mastercool 71550 AC hose crimper and made all the hoses for the system. Here's what a typical fitting looks like coming out of the tool:
http://cjnn.xtremefabricator.com/images/LY6swap/ly6swap1438.jpg
This tool is very simple to operate. It comes with ...
- Thu Aug 23, 2018 8:27 am
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
High Pressure Line
Many years ago I picked up compressor fittings from Docs Blocks just before they went out of business. I got both straight and angle/tube adapters and ended up using a combination: straight on the suction side and right angle on the high pressure outlet. Unfortunately the right ...
Many years ago I picked up compressor fittings from Docs Blocks just before they went out of business. I got both straight and angle/tube adapters and ended up using a combination: straight on the suction side and right angle on the high pressure outlet. Unfortunately the right ...
- Wed Aug 22, 2018 9:25 am
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
Thanks for the info 71403. Out of curiosity, do you know what the ECM does as an anti-slug routine?
- Tue Aug 21, 2018 12:59 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
Liquid Line
Last night I loosely mounted the drier and started looking at liquid line routing. I was happy to see I should be able to route the line tucked inside the fender and out of sight by using 45 degree fittings on either side of the drier and a 90 degree fitting at the TXV.
http://cjnn ...
Last night I loosely mounted the drier and started looking at liquid line routing. I was happy to see I should be able to route the line tucked inside the fender and out of sight by using 45 degree fittings on either side of the drier and a 90 degree fitting at the TXV.
http://cjnn ...
- Tue Aug 21, 2018 12:49 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
bohica2xo wrote:DEC PAG explanation https://www.autoacforum.com/messageview ... adid=17571
Thank you for both suggestions! I will look into these.bohica2xo wrote:For heater valves on GM stuff I use a vacuum unit, like the AC Delco P/N 155536 It was used on G vans, and P vans from 1990 to 1996.
- Tue Aug 21, 2018 12:47 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
Here is a look at the exit of the POA valve showing the adjustment screw and lock nut.
http://cjnn.xtremefabricator.com/images/LY6swap/ly6swap1417.jpg
Can someone confirm if the threads are standard direction? i.e. I would turn the lock nut counter clockwise to unlock.
Also which direction on ...
http://cjnn.xtremefabricator.com/images/LY6swap/ly6swap1417.jpg
Can someone confirm if the threads are standard direction? i.e. I would turn the lock nut counter clockwise to unlock.
Also which direction on ...
- Tue Aug 21, 2018 12:42 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Resurrecting 1970 GM AC with POA
- Replies: 35
- Views: 149057
Re: Resurrecting 1970 GM AC with POA
POA Valve Testing
The POA has followed me in storage for the last twenty years, always kept in a ziplock bag in a storage bin of parts for the Nova. It's been moved dozens of times and it's sort of a miracle I haven't lost it. For a long time I was dragging around all the AC-related parts ...
The POA has followed me in storage for the last twenty years, always kept in a ziplock bag in a storage bin of parts for the Nova. It's been moved dozens of times and it's sort of a miracle I haven't lost it. For a long time I was dragging around all the AC-related parts ...