Search found 846 matches

by Cusser
Thu Jan 11, 2024 7:54 am
Forum: Automotive Air Conditioning Forum
Topic: 1969 Cadillac Sedan DeVille
Replies: 18
Views: 4713

1969 Cadillac Sedan DeVille

My friend has a 1969 Cadillac Sedan DeVille which has been in his family forever; nothing has been done to the AC (still R-12) in decades. He reports that the AC only cooled "mediocre" in 90F weather last summer, figure some refrigerant loss over those years. However, his immediate issue i...
by Cusser
Sun Dec 10, 2023 7:04 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: R134a oil
Replies: 4
Views: 8769

Re: R134a oil

When I was working in the chemistry lab, I could use infrared spectroscopy (IR, FTIR) to detail in two minutes whether refrigeration oil in a system was PAG or mineral-type oil. Know anyone who works in a chemistry lab???
by Cusser
Sun Nov 26, 2023 6:58 am
Forum: Automotive Air Conditioning Forum
Topic: wont hold vacum but will hold pressure
Replies: 7
Views: 7691

Re: wont hold vacum but will hold pressure

How do you know it is holding pressure? My interpretation is that since there was R134a in the system (6.57 pounds ) that he ASSUMES that it's holding pressure. I would think a big leak would even be able to be heard and would not hold 6.57 pounds for long. So I suggested for him to do a vacuum tes...
by Cusser
Sat Nov 25, 2023 8:01 am
Forum: Automotive Air Conditioning Forum
Topic: wont hold vacum but will hold pressure
Replies: 7
Views: 7691

Re: wont hold vacum but will hold pressure

The leak could be in your AC system or in your equipment; check out the equipment first for leakage.
by Cusser
Fri Nov 17, 2023 6:26 am
Forum: Automotive Air Conditioning Forum
Topic: Can't figure out why I'm not getting cold air - compressor works and system is charged (I think).
Replies: 13
Views: 10046

Re: Can't figure out why I'm not getting cold air - compressor works and system is charged (I think).

Typically will not lose oil during a recovery/recharge. Typically will not lose oil with tiny leak over a few years (such leak is normal/expected).
by Cusser
Tue Nov 14, 2023 6:33 am
Forum: Automotive Air Conditioning Forum
Topic: Pulling Vacuum
Replies: 4
Views: 6113

Re: Pulling Vacuum

I installed all new components for the AC system on my 73 corvette and pulled a vacuum on the system. After pulling 29" of vacuum I shut off the low and high side valves on the AC manifold gauge set and then shut off the vacuum pump. The system dropped down to just over 15" in about five ...
by Cusser
Tue Nov 14, 2023 6:31 am
Forum: Automotive Air Conditioning Forum
Topic: Can't figure out why I'm not getting cold air - compressor works and system is charged (I think).
Replies: 13
Views: 10046

Re: Can't figure out why I'm not getting cold air - compressor works and system is charged (I think).

QUESTION: Do you all think I should WAIT for warmer weather before taking my car in to get looked at? Yes. You have some pressure/refrigerant in the system, so moisture air won't get in. It's easier to diagnose in warmer weather. I figured for 52 degrees outside 28psi seemed OK -- but I'm a total r...
by Cusser
Mon Nov 13, 2023 7:06 am
Forum: Automotive Air Conditioning Forum
Topic: Can't figure out why I'm not getting cold air - compressor works and system is charged (I think).
Replies: 13
Views: 10046

Re: Can't figure out why I'm not getting cold air - compressor works and system is charged (I think).

Disclaimer: I'm not an AC professional. But my advice is free, and worth every penny. 52F is pretty low temperature to try any AC diagnosis. But 28psi is pretty low. I'd get a real service gauge kit if you want to continue diagnosing by yourself. And I'd run away from what you purchased if that can ...
by Cusser
Thu Nov 09, 2023 8:27 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor turning question
Replies: 10
Views: 7860

Re: Compressor turning question

What does a good compressor feel like? I'm not a professional, have installed about a dozen brand-new compressors is different vehicles. The center drive plate should turn with a wrench with some resistance but not forcing it. I'd rather just buy a new clutch but I don't want to buy a clutch and th...
by Cusser
Fri Oct 27, 2023 11:36 am
Forum: Automotive Air Conditioning Forum
Topic: What size a/c service port cap for 2020 Corolla?
Replies: 10
Views: 10801

Re: What size a/c service port cap for 2020 Corolla?

Dealer wants $13 for just one high side cap. See these on Ebay for under $1. Any idea which one? Get cap from the dealer for $13. You have a relatively new vehicle (2020) and you're getting cheap over this??? (My newest vehicle is a 2004 Frontier !) What's really sad is that there are multiple caps...