I've got a 1993 Mazda 626 with a ruptured discharge (high pressure) line. I'll be doing the repair myself.
I've got a new line, dryer and O-rings. I also have an 8 ounce can of ester oil and several cans of R134a refrigerant.
I know that there is no R12 left in the system (schrader valve has been loosened and there is no pressure). I also know that at least one can of stop leak and one can of Duracool (Propane) has been used in this system. At this point the system has no pressure and contains R12 oil and stop leak fluid as well as some residual propane.
At this point I know that I should be doing the following: - Install the new R134a fittings to the system - Flush the current system and remove the R12 oil and other contaminants - Replace the line and dryer, using new O-rings - Evacuate the system to at lease -29lbs for 30 minutes or more - Add the can of Ester oil - Fill the system with 20 ounces of R134a (Normally 24 ounces of R12 in this system)
My questions are these... - Can a shop flush and evacuate the system without recharging afterwards? Will the system hold the vacuum for an hour until I get the car home and recharge it? - If I have a shop flush and evacuate the system I will need to have the new hose and dryer already installed. Will they be "contaminated" by the flushing? - Is there a method that I can flush the system myself and be sure that I've got the oil and contaminants out of the system?
Thanks!