Striker2237

They should be normal, my low side valve was leaking recently

Andrew12

Well, not been going great. Pulled off all the covers, tracked all the lines... Getting hits everywhere... finally figured out the car is just saturated...
Washed and cleaned everything really well.
Seems to be coming from the front expansion valve or possibly one of the lines. Hard to tell, the front valley (cowl) seems to fill up really quickly.
I have been using a shop vac in reverse to clear the cowl area, still hard to tell the source.
Would like to take a stab at the front expansion valve and the four O-rings.. I can get to it, but doesn't look like there is enough clearance...

PaulW

I watched the guys who put the AC unit in my house find a leak with a leak detector, they also got multiple hits everywhere. Once the boss came, he pulled out his super high quality detector and they found a bad solder joint and fixed it in no time. Moral to the story is, even though you are getting hits, it doesn't mean there is a leak there.

I would go get some leak detection fluid and see if you can find any bubbles, that way you are not taking things apart: https://www.homedepot.com/p/Oatey-8-...2092/100151681

Another thing you can do is to pull a vacuum on the system if you want to evacuate it once more, leave a digital pressure gauge on it overnight and make sure it can't hold a tight vacuum over 12 hours. That will also verify that you have a leak if you are not 100% sure yet. Best of luck. I always say "It's an Audi, it's supposed to leak refrigerant". My 2004 Toyota Sienna has never been charged in the 5 or 6 years I have owned it, the same for my 99 911 (owned it for over 10 years) but my 97 A8, 01 S8, and 07 S8 could not hold a charge for their life. At least my 08 A8 does, I'm in Florida and the AC system works very well.