Refrigerant question
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
I believe the main diffence is the type of compressor oil used. I assume you ask because you can get R-134 at Auto Zone, but not R-12. IMO I wouldn't mix the two refridgerants.
Safety Car
Joined: Jun 2004
Posts: 4,652
Likes: 80
From: Lakeland Florida
hello,
I found a thread that was posted by Zwede on this same topic.
I cut and pasted a comment that he made on the report.
kdf
http://www.corvetteforum.net/c3/zwed...c/retrofit.htm
Oil. R12 systems use 500 viscosity mineral oil. R134A systems use PAG oil. The two are not compatible. If mineral oil is used with R134A, it will not mix with the refrigerant, and the compressor will starve for oil and seize.
I found a thread that was posted by Zwede on this same topic.
I cut and pasted a comment that he made on the report.
kdf
http://www.corvetteforum.net/c3/zwed...c/retrofit.htm
Oil. R12 systems use 500 viscosity mineral oil. R134A systems use PAG oil. The two are not compatible. If mineral oil is used with R134A, it will not mix with the refrigerant, and the compressor will starve for oil and seize.
Racer
Joined: Jan 2003
Posts: 383
Likes: 0
From: Columbia SC
Post your question to this URL
http://www.autoacforum.com
Most of these guys are in the HVAC business
http://www.autoacforum.com
Most of these guys are in the HVAC business
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Originally Posted by Pete76Shark
Post your question to this URL
http://www.autoacforum.com
Most of these guys are in the HVAC business
http://www.autoacforum.com
Most of these guys are in the HVAC business
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Burning Brakes
Joined: Sep 2005
Posts: 1,078
Likes: 0
From: Santee CA
On this general topic...
When the time comes to get the A/C system running on our '74, we're thinking of just taking it to a shop to have the system charged and inspected, since we don't have the tools to fix it.
I'm assuming that any reputable shop should be able to replace it with R12 (assuming that's what's in the system), right? Or am I going to be stuck with replacing components of the system because R134a is the only thing that can be charged in an A/C system nowadays?
When the time comes to get the A/C system running on our '74, we're thinking of just taking it to a shop to have the system charged and inspected, since we don't have the tools to fix it.
I'm assuming that any reputable shop should be able to replace it with R12 (assuming that's what's in the system), right? Or am I going to be stuck with replacing components of the system because R134a is the only thing that can be charged in an A/C system nowadays?
