You will have to change the compressor oil, replace the receiver dryer retro fit the new charge points, evacuate the system and make sure that it holds a vacuum and fill with the correct quantity of refrigerant, you will need to check system pressures when done to ensure all is ok.
mark (mhpautos)
Aug 15, 2009 at 9:42 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.