ZR-1 Net Registry Forums - View Single Post - Air Conditioning Pro's & Con's of Converting to 134

WARP TEN · 02-22-2017

As has been reported previously, GM had a TSB on converting the systems to the newer Freon and said that you did not have to rebuild the system. Just fully evacuate it and fill. There was no problem with seals; as I recall it just needed a different fill valve. Marc Haibeck has converted many systems without incident. I had my 93 system filled with 134A by him and it worked fine as long as I owned it. I presume it still is working. I would suggest a chat with Marc if you have any concerns. --Bob

02-22-2017	#7
WARP TEN Join Date: Apr 2007 Location: Lake Bluff, IL Posts: 2,141	Re: Air Conditioning Pro's & Con's of Converting to 134 As has been reported previously, GM had a TSB on converting the systems to the newer Freon and said that you did not have to rebuild the system. Just fully evacuate it and fill. There was no problem with seals; as I recall it just needed a different fill valve. Marc Haibeck has converted many systems without incident. I had my 93 system filled with 134A by him and it worked fine as long as I owned it. I presume it still is working. I would suggest a chat with Marc if you have any concerns. --Bob __________________ 2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough"