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Whining noise from A/C Compressor

3226 Views 5 Replies 4 Participants Last post by  nuwaus
Hi everyone!

I have a 320d pre-facelift with M47 engine and my A/C Compressor making a strange whining noise when the clutch is engaged.

This whining noise changes its pitch with the engine RPM and when it happens I get poor cooling too.

I have changed everything except for the A/C compressor including evaporator, condenser, expansion valve, filter and cleaned all the hoses.

I read some says it happens when lack of oil/lubrication in the compressor or when low on freon, but I have topped them up too (not sure if it leaks)

Can anybody help me to troubleshoot this issue as it's a real headache now for almost a month?
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