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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 08-04-2004, 03:43 AM   #1 (permalink)
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Can anyone tell me whether or not it is a difficult job to replace the a/c compressor and the reciever/drier on a '92 525i? Are there any special tools that I would need? What about any additional parts that I would need besides a new compressor and reciever/drier? Should I stay with R12 refrigerant or switch to R134?

Sorry for the long request.
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Old 08-04-2004, 10:13 PM   #2 (permalink)
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I've not done this on a BMW, but compressors are usually a simple bolt on as are the driers. Are you sure the compressor is bad?

But there are some general issues about which you should be aware.

First, R-12 is expensive if you can find it. Most AC shops will have some, but many won't charge R-12 if there any leaks.

R134a is like $4 per 12 oz can. But you have to add special adapters which cost a few bucks. You would want to get a conversion kit for about $35. It'll have everything you need, except o-rings. You should replace any o-ring you see. And if you install a new compressor, you must add the appropriate oil and turn it at least 12 times before you install it. Unless you flush the system, you'l want to use POE (ester) oil.

Check the web for retrofit instructions, lots of good resources out there.
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