Automotive Air Conditioning Information Forum (Archives)

beckweed on Sun May 20, 2012 3:20 PM

Hi there,
I purchased a kit from ackits about 4 years ago to replace the AC in my new beetle (134a). Now my husband wants to use the Master Cool vacuum pump and gauges on his 1982 911 that uses r12. Am I correct that he can't use the same gauge we used with 134a b/c this would cause cross contamination?
Thank you.

TRB on Sun May 20, 2012 6:39 PM

Pressure is pressure. As long as you have the correct connections the gauge set will work fine.

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beckweed on Sun May 20, 2012 8:05 PM

Thank you. It is good to know we don't have to buy a separate gauge for his 12r project.

Cussboy on Mon May 21, 2012 10:24 PM

I've got the opposite: I have R-12 gauge set (still use on my 1988 truck) with adapter hoses for R134a use.