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Please Help! My valve/port is leaking

michellechevy on Sun July 08, 2012 12:05 AM User is offline

Year: 2000
Make: Chevy
Model: Blazer
Engine Size: 4.3
Refrigerant Type: 134a
Country of Origin: United States

I really need some help/information with my air conditioning. Here's the problem, I have a valve core/port leaking badly. I'm sorry i'm not very familiar with the terminology. I'm a woman, and I don't normally work on my own stuff. But I had previously taken this to have it fixed, and thought that it was until the next morning when I had no air.

I'm not sure if it's called the high or low port, but it is not the one that you put the 134a into (the one you put the 134a into is above the one that is leaking and has a blue cap). It started as a slow leak, but now it leaks out fast even with the cap on. If you unscrew the cap, it spews out.

I went to autozone and bought a "R-134a High&Low Side Service Port Repair Kit" which has two valve cores, and two caps, and a tool to remove the valve cores. Upon opening the kit, I find that the tool will not retrieve the valve core. So I unscrewed the "port" I think that's the right term. It's the thing that holds the valve core, and when I look down into it, from the part that would be visible if it was on the vehicle I see a rounded piece of metal copperish colored. If I flip it over to the part that wouldn't be visible if assembled. It looks like the valve that came in the kit I bought. I can't remove it from the underside with the tool that was in that kit either.

So my question is, what do I need to do to fix this. I know I probably need to replace the part that I unscrewed (that contains the valve core) but where do I get it? There's no way to change this valve core that I know of. The auto parts store told me that if I couldn't change it with the kit I bought, I had to take it to the dealership. That was the only option I had.

Is there another valve core that I can buy, or should I just try to change the piece that I took off.

Tell me which is the easiest.

Thank you very much for your time,
A Lady sweating in 105 degree weather appreciates your help!

P.S. If pictures would be helpful, I can go out and take pictures, and unscrew that piece and take a picture of it.

AutoCool on Sun July 08, 2012 3:48 AM User is offline

I believe this is what you're looking for.

GM primary adaptor

Edited: Sun July 08, 2012 at 3:53 AM by AutoCool

michellechevy on Sun July 08, 2012 1:46 PM User is offline

Thank you very much Autocool for replying! That looks like what i'm looking for. Should I measure mine to make sure it's 13mm like the one you linked to?

I wanted to call the port the low side, because it's down below the other one, but someone told me that it had to do with pressure not where it was located.

So what i'm dealing with is the low side right?

michellechevy on Sun July 08, 2012 1:53 PM User is offline

Sorry to bug you again, but does the new port have to be welded back on? Or can I just twist it back in, like I took the other off?

newton5 on Sat July 14, 2012 10:35 PM User is offlineView users profile

The new port will have threads and an oring, so it will just screw back in place of the old one.

For future reference, you should post questions in the main Forum section. Tips, Tricks and FAQ is basically a section of helpful "stickys" for reference to common problems. You didn't do anything wrong, but your posts will get more attention over there.

Toenail on Wed August 22, 2012 5:45 PM User is offline

I had a similar problem with a Tahoe and found some brass caps that fit the threads inside the ports. These caps also have an O-ring and fixed the problem without the big expense of changing the valves in the ports. Also it is a permanent fix instead of a temporary one. I threw the original plastic caps in the trash.


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