Reply to "Orignal R12 A/C Pressures Readings?"

Wasatch, I hope you removed the tiny screen-filter that resides in the evaporator valve under the dash before you started this exercise. The little conical screen is inside the side-leg of the evaporator, and in a 40-year old car, will be guaranteed plugged solid with rust, rubber flakes and pieces of broken-down dessicant. No freon flow= no cooling! If you're still using a stock York, the only value that antique has is its shut-off valves! You can isolate part of your R-12 by closing the valves, then untighten the side hose from the evaporator and hook the little screen out with a bent wire. Clean it carefully; solvents will dissolve the gooey rubber. With r-134a, some shops leave the screen out to increase freon flow & get more cooling. The whole system will work better with new-everything, incidently but especially a new dryer/dessicant can.