This must be an answer from an AC tech. If I can spend less than $20 for a permanent fix instead of paying a tech $100 to $500 for replacing the faulty valves with more faulty valves then why not?

 

Patching the hole is not a permanent fix and I'm not an A/C tech.

BTW, did you ever get the system to work?

 

all the caps do is keep debris out of the port, so your backyard fix may have worked but I wouldn't trust it or call it a proper repair

 

FYI, I noticed that when I pulled one of the caps, there was a small amount of pressure released. I think I can safely say the valves need to be replaced.

 

FYI you can replace them, replace them, & replace them. Exactly what you do when the design is faulty. Or you could just cap them off and use them when needed to service the AC then re-cap them. The older R12 units also leaked but had a cap that sealed them off when not being used to service the AC.

 

not trying to turn this into a turd throwing thread but theres plenty of vehicles out there that have never had to change a schrader or service port

 

Of the 20+ vehicles I've owned over the years, I've never had to replace an A/C schraeder valve.

 

I understand the whole problems regarding AC because i was also suffering from this problem but the optimum solution of this problem to contact AC SERVICE CYPRESS.They are fully experts in their passion.And are affordable.

 

My 2000 suburban has no low pressure a/c service port

 

Without seeing your vehicle in person, I cannot confirm this. I'll just say that both our 1994 Suburban (now sold) and our 2005 Yukon XL do have low pressure service ports.

Look at this Youtube video, guy show recharging of a 2000 Suburban, shows low pressure service port near the accumulator. Note that I fully disagree with the charge kit he uses in this video,most of those quickie kits can contain sealing agents which will kill a system permanently. Get a set of real gauges, and only use pure R134a or R134a containing UV dye, no sealing agents.