AC question
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
94 was the first year r134a was used in Corvettes.
When a system is converted from R12 to a different refrigerant, you're suppose to install different fittings on the high and low side pressure test ports along with a sticker indicating what refrigerant has been installed.
R134a type fittings are a quick coupling type. Blue color cap is low side and Red color cap high side.
R12 fittings are screw on type.
Here's a pic. of R134a adapter fittings.
Here's a pic of an R12 Accumulator. The small valve is the low pressure test port. The test port has threads on it.
When a system is converted from R12 to a different refrigerant, you're suppose to install different fittings on the high and low side pressure test ports along with a sticker indicating what refrigerant has been installed.
R134a type fittings are a quick coupling type. Blue color cap is low side and Red color cap high side.
R12 fittings are screw on type.
Here's a pic. of R134a adapter fittings.
Here's a pic of an R12 Accumulator. The small valve is the low pressure test port. The test port has threads on it.
Last edited by Hooked on Vettes; Jun 15, 2008 at 12:39 AM.
