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Probably the o-rings that seal the hose manifold to the compressor.
Dye is all over the engine side, right? comes around to the bottom and crawling up the fender side?
Leak test, likely the two 0-rings are shot, blowing freon and oil out. Naturally, it's almost impossible to reach the engine side to test, and you will have to pull the compressor to replace them, but otherwise this is a very easy job. You won't have to pull the clutch or anything, just the hose maifold (four 6mm allen screws, probably). Get new 0-rings for the hose connection too, just to be safe.
Peter
Peter
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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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