I was going to convert to r 134a, but have since decided that R406a would be better, I've already replaced all of my o-rings for the special o rings for R134 a, will there be any issues with the R406 a and the R134 A o rings?

Thanks-

Eric

 

http://refrigerantsales.net/shop/info/af_qaf.pdf

"The best choice for o-rings is also Neoprene and can be found at any GM or AC Delco dealer (black in color). Most parts stores stock a dark blue o-ring which is also neoprene. Green o-rings are made from a new type of a polymer labeled as HNBR and has greater resistance to high temperatures. These o-rings were developed for R-134a and are thought to have better heat characteristics. Also Ford used this material for their spring lock fittings. They even used an odd size (thicker) to try and keep these fittings from leaking.

Autofrost will work fine with this rubber if it came from the OEM's however HNBR o-rings that are purchased elsewhere are many times of cheap quality and will not fare well. For this reason we ask that you always ask for neoprene."

 

406 is a blend of compatible and NON-compatible refrigerants with respect to the green O-rings.

Therefore you might want to stay with 134.

 

I would switch the O-rings before staying with R134a, its a HORRIBLE refrigerant.

 

when I get in the car in turn the A/c on max, I want to be cold now, not 10 minutes later, so, just use the regular black o-rings then?

 

Black o-rings (make sure they're neoprene and you should be good)

 

Honestly, thats why I like a little something else that I use in my 1983 G20 for refrigerant. It is completely compatible with mineral oil, rapidly cooling within 30 seconds of startup and ICE cold within 2 minutes, even at idle in 100* heat. I won't say what because I have been in this debate before... At the stock cycling switch adjustment the air would blow at 15-18*F at IDLE!!!!!!! Is super low cost, environmentally safe, nearly zero global warming, and super efficient. It will move around 20% more heat compared to R12 in an R12 system and use 10% less energy doing it. The charge is roughly 1/4 to 1/3 the R12 amount, so the pressures change rapidly in the system and this is key to how quickly it starts cooling.