High side AC port issue

[Jobi-Wan Kenobi]

I went to to troubleshoot why my AC doesn't seem to function right and when I pulled off the dust cap for the high side port the refrigerant leaked out. So I picked up a repair kit this afternoon that has a new port and valve cores but I can't get the old port off the line. I have a vacuum pump hooked up to see if I could pull a vacuum but I can only get down to about 20" and when I shut the pump off I lose vacuum pressure. My though was to at least start with changing the high side port. Anyone have any tips where else to look? It's been a while since I've worked with AC.

 

[Jobi-Wan Kenobi]

Or am I wrong thinking that the port comes off the line?

 

[swathdiver]

I went to to troubleshoot why my AC doesn't seem to function right and when I pulled off the dust cap for the high side port the refrigerant leaked out. So I picked up a repair kit this afternoon that has a new port and valve cores but I can't get the old port off the line. I have a vacuum pump hooked up to see if I could pull a vacuum but I can only get down to about 20" and when I shut the pump off I lose vacuum pressure. My though was to at least start with changing the high side port. Anyone have any tips where else to look? It's been a while since I've worked with AC.

You can replace the whole port with a special socket:

https://www.amazon.com/dp/B07FQBSSWV/?coliid=I2Z83VLR9AX8DN&colid=M4KI6N2ABT9N&psc=1&ref_=list_c_wl_lv_ov_lig_dp_it

 

[OR VietVet]

Your elevation effects the vacuum reading. At sea level you can get close to 30 inches of vacuum. In Death Valley, below sea level, you can get more. The amount of vacuum inches is lower at higher altitudes. You have to be pretty high altitude for 20 inches of vacuum or have a poor vacuum pump or a constant leak effecting the reading. I have only replaced a shrader valve, so I have never used a repair kit.

 

[Jobi-Wan Kenobi]

@swathdiver don't have the socket right now but can get one. The concern that I have though is that with using what I was to try taking the port off seemed like was going to twist the line.

 

[OR VietVet]

Check you tube

 

[Jobi-Wan Kenobi]

@OR VietVet I'm guessing a constant leak because if I don't even have the high side hose hooked up I'm losing vacuum pressure through the port. I can feel it with my finger over the port.

 

[OR VietVet]

If you don't have the tool, get it and either just tighten the shrader valve or remove and replace the shrader with new.

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[Jobi-Wan Kenobi]

@OR VietVet I do have the tool to remove the Schrader valve, just not the socket for the port. But the valve is covered by this little black cap so I can't actually get at it

 

[OR VietVet]

Ok, IMO, I never want to use a repair kit. It is another source for a leak. I would get another line assembly.