Did MKIII's come from factory with R-134?

[RazoE]

well, this is so cal, I don't need freezing temps, but atleast 50F on a summer day..

 

[Kckazdude]

Good grief Hommer. And you claim to be a professional mechanic? You actually do this for a living?

All the cool parts swappers are doing it these days!!
Autozone sells everyone a retro kit that works great!:nono::sarcasm::thumbsdow:icon_roll

 

[jetjock]

^ Lmao. Let 'em do it I say. Keeps guys like me who do AC work on the side in spending money.

Razo: Maybe so but such lacklaster performance will result in it taking much longer time to get there...

 

[Jeff Lange]

If you're converting from R12 to R134a, there's a few things you should do if you want it done completely correctly.

1. Evacuate the system completely.
2. Replace all the o-rings in the system with R134a compatible ones.
3. Replace the receiver/drier.
4. Add adapter fittings for R134a.
5. Use the correct oil and fill with R134a.

Anything other than that may work, but probably not quite as well, and not for as long, so don't skimp. IMO.

Jeff