a.c. condenser

1998 BMW 323
130,000 MILES • 6 CYL • 2WD • MANUAL
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MPETRUESCU
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  • 14 POSTS
im replace my condenser for my car, the old one has a hole in it. I was wondering when i put the vacuum pump how much vacuum should i have(also with the engine off??). is there something i need to be aware of or something else that i need to do.
Aug 12, 2011 at 3:45 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
you really should have a pro do this, but if your condensor has a hole in it then you should also replace the reciever/drier, pump it down to 29" for 15 minutes, do a freon sweep then pump it down again for another 15 minutes. don't forget to add the correct oil to replace the stuff that is gone from the old condensor.
Aug 12, 2011 at 4:12 PM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
Just so you understand what it is that you are doing when you are running a vacuum on it.......... Water will boil at a lower temp when atmospheric pressure is lowered. Water will boil at room temp when held at 29" of vacuum so it will boil all the moisture out of the system.
Aug 12, 2011 at 4:25 PM
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MPETRUESCU
  • MEMBER
  • 14 POSTS
yea i've been looking over it, your right ill just replace the condenser and drier and have the pros fill her up.
Aug 13, 2011 at 5:41 PM
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