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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 06-22-2013, 08:19 AM   #1
76m2002
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Replace a/c drier?

Last year I replaced my a/c compressor and receiver/dryer. Last week I bent my condenser during routine maintenance (D'Oh!) and will replace it today. Do I need to replace my drier again? It's not like the compressor puked parts, it's just that the bonehead owner necessitated opening the system up to the atmosphere to replace the condenser.
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Old 06-23-2013, 10:32 AM   #2
xbombtrackx
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you're going to need to take it to a AC tech, unless you've got all the tools. you "could" replace/fix the condenser and recharge with some over the counter stuff but i'm pretty sure the stuff you buy at autozone/wal-mart ect is a synthetic blend, used for topping off. I personally wouldn't recharge a system entirely with that stuff. you're system would work for a while but if you don't put it under a vacuum to draw the moisture out and check for leaks prior to recharging the moisture will mix with the refrigerant, turn to an acid, and destroy everything from the inside out.
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Old 06-23-2013, 10:40 AM   #3
76m2002
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When I've worked on my a/c in the past, I always finished up with an evacuation/recharge from a pro. That's what I'm planning this time, but I was lazy about removing the headlight, etc to get at the drier. I decided to do it anyway.
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Old 06-23-2013, 10:48 AM   #4
xbombtrackx
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ahh, you should be good then. other then the venting to the atmosphere part, unless you UNKNOWINGLY released it.
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Old 06-23-2013, 10:54 AM   #5
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If you did not loose freon, you dont have to replace the drier. Only replace your drier if you system is open and exposed to the atmosphere for a long time.
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Old 06-23-2013, 01:36 PM   #6
76m2002
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Quote:
Originally Posted by xbombtrackx View Post
ahh, you should be good then. other then the venting to the atmosphere part, unless you UNKNOWINGLY released it.
Most shops I've used have been pretty good about evacuating the freon/R134a for me, and then vacuuming/charging the refrigerant after I've finished the plumbing work.
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