Leaderboard

1. Push valve to let some refrigerant out. Done. 2. If you think it’s leaking, or don’t trust the amount in the system - I’d replace the orings at the compressor lines and put 20 ounces of refrigerant (put however much the sticker says that’s usually on the upper radiator support) in it and call it a day. The orings get brittle and hard like plastic instead of soft and pliable like an oring. Interestingly all the other orings can be fine in the entire system except those two. I assume it’s due to heat cycling at the compressor/engine increasing the degradation rate of the rubber. The cause doesn’t matter, what’s important is how common this is on older Subarus. Done it to countless Subarus, and importantly, only once to each one! Those lines at the compressor leak *all the time*.

most every time I've followed a thread where a system was overcharged, there has been a 'hooting' noise reported. Sometimes when the car/system is turned off.