I am replacing AC evaporator and need to add oil. Can the oil be added directly to the new evaporator before installing? If not where is the proper place to add the oil?
There most likely is no need to replace the oil as oil travels with the gas
it is normally put in through the compressor but the amount is critical as excessive oil will block the TX valve
now that you have replaced the evaporator, take it to an auto ac specialist shop , have the system evacuated right down , any oil required to be added and the correct amount of gas to be installed
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