AO Gold Member
Join Date: Sep 2002
Location: The Netherlands
a proper aircon filling requires a special (expensive) tool like an Examiner, (just did that routine)
it sucks out oil and cooling liquid and then puts 15 bar pressure on the system for 30 minutes to see if there are leaks, then it vacumizes the system for another 30 minutes and waits another 15 minutes to see if the vacuum is maintained. Then the refill with oil and cooling fluid is done,
in modern sysyems like Alfa around 850 g of cooling fluid is needed.