Vehicle: 1994 Range Rover Classic, TXV type AC, Sanden compressor, converted to R134a. Background: Rebuilt AC with new TXV, drier, flush, R134a kit, new oil, dye, etc. Worked fine for 3 years or so. Drove it the next spring, no AC. No leaks detected, refilled. Leaked out in a few weeks, no more AC. ...