R12 to R134a adapter question

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Aug 10, 2015 | 09:13 PM

71 Green 454

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Le Mans Master

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From: Tampa Florida

R12 to R134a adapter question

Do the R12 to R134a adapters require the removal of the old schrader valves on the GM A6 compressor?

Aug 10, 2015 | 09:18 PM

'75

Le Mans Master

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From: McHenry Illinois

It depends on the adapter used, most I have seen keep the schrader valve in place. The 90 deg adapters have a schrader in them so the original needs removed.

Aug 11, 2015 | 12:43 PM

toobroketoretire

Melting Slicks

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From: Great Plains Iowa

I modified my R-134 refrigerant can adapter so I can charge my system thru my R-12 gauge set. So all of my fittings remain R-12 but I'm running R-134. I guess I'm just cheap?

Aug 11, 2015 | 01:35 PM

mrvette

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From: Orange Park Florida

Quote:

Originally Posted by toobroketoretire

I modified my R-134 refrigerant can adapter so I can charge my system thru my R-12 gauge set. So all of my fittings remain R-12 but I'm running R-134. I guess I'm just cheap?

Same thing here, but to charge a 134 car/wife's car, I had to cut a couple hoses and then splice/clamp them together as a miss match to get the correct end.....my gauges are probably 30 years old.....pressure is pressure, but I HATE 134, wish 12 would come back...leaks less....stupid EPA.....

Aug 11, 2015 | 01:46 PM

71 Green 454

Thread Starter

Le Mans Master

Joined: Jun 2006

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From: Tampa Florida

Quote:

Originally Posted by toobroketoretire

I modified my R-134 refrigerant can adapter so I can charge my system thru my R-12 gauge set. So all of my fittings remain R-12 but I'm running R-134. I guess I'm just cheap?

I can do the same thing, but I'm just wanting to be legal.

Aug 11, 2015 | 02:07 PM

zwede

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From: Plano TX

It's been a long time since I did mine, but I remember the large adapter didn't have a valve (old one was re-used). The smaller one had a valve and the old one had to be removed.

Aug 11, 2015 | 04:53 PM

Bandel

7th Gear

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Is R134a a direct replacement? I thought you'd have to change the expansion valve and o-rings?

Aug 11, 2015 | 06:01 PM

zwede

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From: Plano TX

A correct conversion includes new o-rings, adjust the POA valve (or replace orifice tube on later C3s), and a parallel flow condenser. And the adapter fittings, of course.

If all the above is done the R134a system will blow as cold as R12.