I am going to swap out the R4, pull a vac, see if it holds, then test charge with a small amount of R22/dye to pressure test, sniff again and see if it will get a good high side psi. If all is good I will evac and charge with R12.

All I have to loose is time and sore back..LOL

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1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

609 Certification