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  #1  
Old 06-18-2018, 01:33 AM
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Join Date: Mar 2010
Location: Freehold, NJ
Posts: 501
W123 new A/C compressor noise

I replaced my A/C compressor recently and recharged it back up. It was previously switched to R134 a long time ago. When I recharged it back up, it blows cool (not cold) and the compressor makes a noise. Would this be too much or not enough refrigerant? It only does it when the compressor engages. Otherwise it is quiet. Belt is good too and not too lose or too tight.

https://youtu.be/hYk83cGfMY0

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  #2  
Old 06-18-2018, 05:20 AM
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Join Date: Oct 2004
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Did you add oil before you recharged?
I had similar noise on my 124 and I can tell you that it does not take long until it blocks.

Tom
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  #3  
Old 06-18-2018, 05:23 AM
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It came prefilled with oil. Some dripped out while I was installing the lines though. Seems there is now way to not have some come out while connecting the lines.
__________________
2022 Nissan Frontier Pro4x
1990 Mercedes 420SEL
1950 Packard 8

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
1988 Mercedes 560SEL (parts car)
2010 BMW 550i xdrive
2017 Audi A4 Presitge
1979 300SD 313k
2003 E500 189k
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  #4  
Old 06-18-2018, 07:03 AM
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1991 300D 2.5 Turbo
 
Join Date: Jan 2011
Location: NC, USA
Posts: 360
Ok, I'm gonna be "that guy..."

Are you sure that's the compressor making the noise and not something else in the belt path?

Did you add the r134a back by recommended weight?

Is the compressor new or a reman?

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