I think I need to add some oil to my york compressor because it has a slight knocking sound when the clutch is engaged. It it possible to add oil through the suction side of the compressor, or do I have to add it another way. Since this is a york style compressor I didn't know if I could use a oil charge can from autozone or not. Please help, I don't want to run the AC until i get some more oil in it so I don't damage it. Its getting hot in Florida. Thanks

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg