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Old 05-29-2019, 06:30 AM
sabino56 sabino56 is offline
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Confirm AC compressor clutch not replaceable

Hi, F30 2013 335i
Diagnostic by technician is an open on circuit in compressor. I wanted to confirm the entire compressor needs to be replaced. It doesn’t appear there are any replaceable parts except entire compressor.
Related question, from reading post it seems the “old standard” electrical clutch is gone on this year and replaced by some variable vane compressor. Is this correct?

Thanks for any help, advice
Ed
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Old 05-29-2019, 09:15 AM
pshovest pshovest is offline
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BMW has used both clutch and clutchless AC compressors.
My '10 N54 535i, same engine as your 335i I believe, is the clutchless design. Even though there is no clutch it does have a replaceable control valve. Really only practical to replace control valve if you DIY the entire job. If you're paying someone replace the compressor.
Who did the diagnosis....Delaer, AC shop or indy shop?

Last edited by pshovest; 05-29-2019 at 09:39 AM.
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Old 05-29-2019, 09:15 AM
pshovest pshovest is offline
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Last edited by pshovest; 05-29-2019 at 09:19 AM.
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Old 05-29-2019, 09:33 AM
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Doug Huffman Doug Huffman is offline
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NewTIS Functional Description of A/C Compressor.

https://www.newtis.info/tisv2/a/en/f...ressor/XCchE4e
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Old 05-29-2019, 02:21 PM
pshovest pshovest is offline
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Old 05-29-2019, 09:33 PM
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Had a 1-time drivetrain malfunction warning light that didn’t come back on again upon restarting the engine. It did, however, record a fault code indicating high pressure in the a/c circuit which shut down the compressor that one time. Subsequently, I would hear a slight whirring whinnying sound when accelerating from 1st and 2nd gears. Brought it back to the dealer and the tech was able to trace the sound coming internally from the compressor. They replaced the compressor which thankfully was covered by the 4year warranty.
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Old 05-30-2019, 09:13 AM
sabino56 sabino56 is offline
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Thanks for responses.
A Indy BMW shop did the diag. Reading thru it seems complete. Ran diags and found fault in climate control indicating open or short in compressor clutch. Verified by direct measurement. Seems easiest quickest is to replace compressor. Seems some variability in design and would be most certain to have old one in hand before looking for replaceable parts. I’ll take a look at old one as to what failed and whether it can be fixed for a spare sometime. Appreciate the TIS link, also helpful.
Ed
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