C 230 (203.040) L4-1.8L SC (271.948) (2005)
Drive Belt: Customer Interest
Engine - Accessory Drive Belt Noise
Date: November 17, 2008
Order No.: P-B-13.20/03a
Supersedes: P-B-13.20/03 dated May 23, 2008
Group: 13
Revision History
SUBJECT:
Model 203.040/740
Noise from the Belt Drive
If you receive customer reports in the above model vehicles of noises from the belt drive, the cause could be the freewheel of the alternator pulley is
seized or has excessive resistance. Follow the procedure below for corrective actions.
1. Remove the poly-V-belt.
2. Pry the plastic cover off the end of the alternator pulley (Figure 1, G2). Insert socket wrench tool (W602 589 00 10 00) to hold the shaft from
turning. Turn the pulley clockwise by hand and it should lock. Turn the pulley counterclockwise, it should freewheel.
3. If the pulley did not freewheel, it needs to be replaced. It is not necessary to replace the alternator.
4. Use a 17 mm wrench on the end of the socket wrench tool and hold it stationary (allow it to contact the frame/sub frame). Insert socket through the
center of the socket wrench tool and into the end of the alternator shaft. For Bosch alternators, use M10 socket W601 589 00 10 00 and for Valeo
alternators use a long Torx 50 socket available commercially. Turn the socket clockwise to remove the pulley (Figure 2). Remove spacer on Valeo
alternator (Figure 3).