R12 to 134A When Was The Change???

[Blue Flame Restorations]

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]

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

[VetteMed]

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]

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.:o

:cheers:
Tom

[Blue Flame Restorations]

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