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Old 01-13-2013, 10:53 PM   #3
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Join Date: Jun 2010
Location: CT
Posts: 2,129
My Ride: 2001 325i
Does anyone know of a link for a hydraulic to mechanical tensioner pulley DYI?
Understand you have the wrong part on hand, however, BMW superceded the mechanical tensioner with the hydraulic one.

Return the mechanical one, and either just replace the hydraulic pulley, which is available separately, or if you want replace both the pulley and the hydraulic cylinder. The part numbers are here., as one source, has the OEM parts.

Last edited by Sansho; 01-13-2013 at 10:56 PM.
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