i have a new compressor and drier that i am going to install into my 82' 240d. I just removed the old compressor and drier and now will be doing a flush of the lines, evap and condenser. Once i hook everything back together, do i want to put oil in the compressor before or after i do a vacuum test? If i do it after, where should i put the oil in?

Are you going to do a nitrogen/134a pressure test first ?

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

There is no such thing as a vacuum test.

There is a pressure test. There is a system evacuation. The two have nothing to do with each other.

After you have flushed and blown clear all flush chemical, with dry gas such as nitrogen or CO2, you want to oil and assemble the components, then pressure test the system for leaks for 90 minutes. If the system pressure does not drop any after 90 minutes, it is ok to evacuate and then recharge. If it leaks pressure, you need to find and repair the leak and retest.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

i was planning on doing a vacuum test by hooking up a vacuum pump to both the high and low pressure sides and making sure it holds vacuum for an hour or so (seems to accomplish same thing as pressure test?)

Just not sure about the steps and oil.

Check out the threads listed in my signature on AC....

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html