In December 2012 I replaced the seal on my original York AC compressor. The system worked as well as it could (due to its inadequate design) for 5 years but refused to come on a couple of days ago. There are drops of oil clinging to the bottom of the compressor and my Yellow Jacket gauge reads atmospheric pressure. Yesterday I attached my vacuum pump to it and evacuated it but the gauge reads zero this morning. So now it's decision time. I am not sure whether I should replace the compressor with another York, a Sanden, or replace the seal once again. A new seal costs only about twenty bucks. About 12 years ago I replaced the Nippondenso in my track car with a Sanden and I have never had to recharge that system. And that car also serves as a daily driver. My 328 is black. It needs the AC working even in cool weather if the sun is out.