Automotive Air Conditioning Information Forum

OK, so stupid- the can taps were the issue- screw top had to be set just right to get refrigerant to flow . Got it to take just under 3 cans, and pressure looks mostly correct per the chart.

The current/modern R134a cans have self sealing tops/valves that theoretically reduce loss of R134a. But ...

Captured o-rings are just a little thicker. Think of it like an old A6 compressor. There are #12 o-rings for the hose connections. And #12 for the back of the compressor, which are thicker, "captured".

So I may need an O-ring WIDER than the green one shown in this photo that I used, where the ...

This morning already, before I depart for Prescott, I used aerosol brake cleaner and brushes to clean up the top of the compressor and the fittings, then washed that off with water. Then I took the truck to Home Depot and used the AC. When I returned, I saw a small ring of dye around the bolt ...

Update:
I purchased a new/better UV light and goggles, and got down to Phoenix to take a look. The Frontier appears to have significant dye on the top of the AC compressor. I had replaced the high-pressure line in 2017 with the only available one, which had compressor fitting 5.5mm longer than the ...

msrichmond wrote: Fri Sep 05, 2025 2:30 pm What size O-ring should be used on an oil filler plug? My local shop tech says there is a leak there.

Once the refrigerant has been recovered, simply unscrew the plug and match up with a new green NBR O-ring. O-ring seal plugs and fittings should not be overtightened.

JohnHere wrote: Sat Aug 30, 2025 12:25 am Does your vehicle take R-134a or R-1234yf?

I believe all 2015 vehicles had R134a.

Disclaimer: I'm NOT an AC professional.

You should post more information. My wild-ass guess is that since it cools at higher rpm, the Kia is moving along the road at that time. I wonder if your electric fan/fans moving air through the condenser and radiator are working...sounds like it could be an ...

I didn't see the site glass,I did look for one.



I have my CFC UNIVERSAL license so I can buy what I need.

See above about knowing correct refrigerant level in a system. Even with R-12 and a sight glass , adding correct amount of R-12 can be tricky.



Why exactly did you bother to post ...

Disclaimer - I'm not an AC professional.

That stated, I do still have a vehicle using R-12, and I live in Arizona.


I bought tonight a 1981 Corvette with 4600 original miles.

1. Being blunt, if you just bought a pristine 1981 Corvette, you can afford to buy a REAL R-12 service gauge set. If ...

Rogermija wrote: Sun Aug 17, 2025 5:57 am Static pressures are about 80 psi indicating reasonable charge.

Not, so fast, grasshopper !

JohnHere wrote: Sat Aug 16, 2025 2:10 pm Diagnosing the system can't be meaningful unless the system is fully charged according to the manufacturer's specifications

Rogermija - Static pressures are just one data point.