A/C Compressor Tensioner Pulley

elerner61 · 11-06-2018, 09:41 AM

I recently have been getting a temporary squeaking on startup. Goes away in 10 seconds. Figured I'd change the A/C Compressor Tensioner pulley since I had changed the other two at 50,000 miles but had left the A/C one be.

Did what I thought was proper research to order the right pulley, but in the end neither pulleys I ordered were the right one (web sources said depending on the tensioner used could be one of two, yada yada yada).

From my experience it seems that you can't just replace the pulley for the A/C compressor tensioner, you have to buy a brand new tensioner and the pulley comes with it. Not horrifically expensive at $50 but seems wasteful.

Has anyone additional information?

GuidoK · 11-06-2018, 10:17 AM

In europe you can get the loose pulley/bearing from multiple 3rd party suppliers for well under 10 bucks.
Its a 70mm pulley, 24,5 - 26mm wide with a 17mm bearinghole.

https://www.pkwteile.de/caffaro/9306079

StickMon · 11-06-2018, 01:23 PM

Pretty sure when I did it I replaced the whole shebang.

11-06-2018, 09:41 AM	#1
elerner61 Major 157 Rep 1,107 Posts Drives: '07 Z4M Roadster Join Date: May 2011 Location: Mount Kisco, NY iTrader: (0)	A/C Compressor Tensioner Pulley I recently have been getting a temporary squeaking on startup. Goes away in 10 seconds. Figured I'd change the A/C Compressor Tensioner pulley since I had changed the other two at 50,000 miles but had left the A/C one be. Did what I thought was proper research to order the right pulley, but in the end neither pulleys I ordered were the right one (web sources said depending on the tensioner used could be one of two, yada yada yada). From my experience it seems that you can't just replace the pulley for the A/C compressor tensioner, you have to buy a brand new tensioner and the pulley comes with it. Not horrifically expensive at $50 but seems wasteful. Has anyone additional information?
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11-06-2018, 10:17 AM	#2
GuidoK #buildnotbought 10841 Rep 4,891 Posts Drives: Z4 3.0i ESS TS2+ Join Date: Jul 2012 Location: Tinkering in the garage iTrader: (0)	In europe you can get the loose pulley/bearing from multiple 3rd party suppliers for well under 10 bucks. Its a 70mm pulley, 24,5 - 26mm wide with a 17mm bearinghole. https://www.pkwteile.de/caffaro/9306079 __________________ Z4 3.0i \| ESS TS2+ supercharger \| Quaife ATB LSD \| Brembo/BMW performance BBK front/rear \| Schrick FI cams \| Schmiedmann headers+cats \| Powerflex/strongflex PU bushings \| Vibra-technics engine mounts \| H&R anti rollbars \| KW V3 coilovers/KW camber plates \| Sachs race engineering clutch \| tons of custom sh#t
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11-06-2018, 01:23 PM	#3
StickMon My other car is on Mars 636 Rep 3,124 Posts Drives: 2006 MR Join Date: Feb 2011 Location: Lo-Cal iTrader: (1)	Pretty sure when I did it I replaced the whole shebang. __________________ Warning: May contain traces of nuts.
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