In this video I will go into detail my attempts to convert a 1972 Buick GS, originally an R-12 AC system to a R152a canned air (Dustoff) system. I will show you the failed and successful attempts, the pressures associated with those attempts as well as the final cooling temps (or lack there of).
Dustoff is rated as mildly flammable so this experiment is not without risk, please understand that there is some risk involved with this conversion.
I plan to have future videos posted of this system to show how it performs in the heat of the summer as well as how long it will last between top-off charges.
Follow the progress of this Buick and get some behind the scenes content on Instagram @72GS455
https://www.instagram.com/72gs455/reels/?hl=en
Chapters"
0:00 Intro
2:16 Parts and tools
4:18 Disassembly of system
7:50 AC System Flush Procedure
9:25 Adding Refrigerant Oil to A6 Compressor
10:51 Vacuuming the AC System Down
11:15 Tapping the Dustoff Can and Charging the System
15:39 Compressed can LIFT-OFF!!!
17:00 First test of the AC System with the R152A charge
17:48 POA Failure
18:36 Results from first test with POA valve stuck
19:06 My analysis of the failure and my path foreword
21:00 We have cooling, but system is overcharged
22:05 Results of first test drive, similar to R134a, results are getting better
22:58 Loud Thunder!
25:00 Pressure readings from first test
26:06 How to adjust a POA valve for R152a or R134a
28:22 Max heat load test with final POA pressure
28:57 Final Pressure readings
29:27 Final Test Drive and Temp Reading
30:36 Closing and future plans with testing system
The idea for this conversion came from a friend of mine who learned it from the RX7 forum and converted his own car: https://www.rx7club.com/2nd-generation-specific-1986-1992-17/aircon-conversion-916789/
As well as a fellow Buick owner who has done this to several of his own cars and has some youtube videos on it. Check out his page here; https://www.youtube.com/user/davida1hiwaaynet