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Old 06-25-2010, 02:19 PM
cn90 cn90 is offline
Officially Welcomed to the 'Fest
Location: Omaha NE
 
Join Date: Mar 2006
Posts: 12,770
Mein Auto: 1998 528i 5-sp 140K+
Look at the layout.

A pulley is basically bearing covered with a plastic wheel on the outside.
Sometimes a pulley comes with the tensioner (such as mechanical tensioner).

Cars with Hydraulic tensioners: tensioner is sold separately from pulley.

Have a look at aioros DIY as well.
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