R-12 to R-134 conversion - ZR-1 Net Registry Forums

XfireZ51 · 06-18-2018

I don't think Marc will have a problem with me posting his response to my inquiry re:134a. Looks a bit less involved than we may have believed. I will swap out the high side switch, just in case, but otherwise...

Hi Dominic,

The OE o-rings and switches are compatible with R-134a refrigerant. I have a GM service bulletin advising that. Only three things are needed. 8 oz. of PAG oil, service port adapters for R-134a and the refrigerant.

When installing a new compressor, it's a good idea to install a new filter/dryer and a new filter/orifice.

Best regards.

Marc

06-18-2018	#11
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,683	Re: R-12 to R-134 conversion I don't think Marc will have a problem with me posting his response to my inquiry re:134a. Looks a bit less involved than we may have believed. I will swap out the high side switch, just in case, but otherwise... Hi Dominic, The OE o-rings and switches are compatible with R-134a refrigerant. I have a GM service bulletin advising that. Only three things are needed. 8 oz. of PAG oil, service port adapters for R-134a and the refrigerant. When installing a new compressor, it's a good idea to install a new filter/dryer and a new filter/orifice. Best regards. Marc