If you evacuate, are you going to capture what’s in there? Or vent it to the environment? I don’t think it’s easy to find a place that will capture it anymore. I could be wrong.

The reasons for evaporating are to assure you have the right mass and also assure the system is dry. My opinion is that if the system is still pressurized on the low side, then you are unlikely to have taken on significant moisture. I think evaporating this time of year is a horrible idea, since the hotter it is, the easier it is to evaporate any water in the system. Only evaporate if you have no pressure. That’s my VERY unprofessional opinion. Charge it by the low and high side pressures, and do everything you can to minimize r12 in our environment.


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Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,