R12 to 134A When Was The Change??? - ZR-1 Net Registry Forums

Blue Flame Restorations · 10-03-2011

I'm putting together some AC lines for the 90 and the 88. I don't care if the 88 has a 134A system (prefer it). I just don't know the timeframe between the two systems. Also, can you use R12 lines on a 134A system and vics versa? I currently have 92 lines on the 90.

Thanks
Brett

BlackWidow#2 · 10-03-2011

If memory serves me correctly the change came in 94. George

VetteMed · 10-04-2011

Correct, 94. My recent A/C issues led to a few incorrect 94-95 parts being sent to me -- the aftermarket parts catalogs often don't make a distinction and apparently cross-reference the 94-95 replacement parts for 90-95. The fittings for 94-95 are metric, 90-93 are SAE. Buyer beware!

Brett, if you use all the components from a later system, everything should mate up fine. But you can't mix and match.

tomtom72 · 10-04-2011

Brett, you proly are aware, but just in case. When going from 12 to 134a you need to use a new dryer and vacuum down the system real well as the oils are different and not compatible, I think? Also, that the O ring rubber composition is different for 134a than 12. You might want to use a new orifice/strainer thingy also.

Tom

Blue Flame Restorations · 10-04-2011

GUys, I really appreciate the help. I think everything I have right now is R12.

10-03-2011	#1
Blue Flame Restorations Join Date: Feb 2010 Location: Pendleton, IN Posts: 3,904	R12 to 134A When Was The Change??? I'm putting together some AC lines for the 90 and the 88. I don't care if the 88 has a 134A system (prefer it). I just don't know the timeframe between the two systems. Also, can you use R12 lines on a 134A system and vics versa? I currently have 92 lines on the 90. Thanks Brett __________________ 1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project

10-04-2011	#3
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: R12 to 134A When Was The Change??? Correct, 94. My recent A/C issues led to a few incorrect 94-95 parts being sent to me -- the aftermarket parts catalogs often don't make a distinction and apparently cross-reference the 94-95 replacement parts for 90-95. The fittings for 94-95 are metric, 90-93 are SAE. Buyer beware! Brett, if you use all the components from a later system, everything should mate up fine. But you can't mix and match. __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) Last edited by VetteMed; 10-04-2011 at 09:28 AM.

10-04-2011	#4
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: R12 to 134A When Was The Change??? Brett, you proly are aware, but just in case. When going from 12 to 134a you need to use a new dryer and vacuum down the system real well as the oils are different and not compatible, I think? Also, that the O ring rubber composition is different for 134a than 12. You might want to use a new orifice/strainer thingy also. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

10-04-2011	#5
Blue Flame Restorations Join Date: Feb 2010 Location: Pendleton, IN Posts: 3,904	Re: R12 to 134A When Was The Change??? GUys, I really appreciate the help. I think everything I have right now is R12. __________________ 1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project

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10-03-2011	#2
BlackWidow#2 Join Date: Feb 2004 Location: Pittsburgh, PA Posts: 149	Re: R12 to 134A When Was The Change??? If memory serves me correctly the change came in 94. George __________________ [SIGPIC][/SIGPIC]George C 91 Black/Black ZR1, #2 of 8 black widow cars 15 black/red Z06 :hello: