Engine Maintenance: Checking POLYRIB Belt State

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NOTE:

The rear wall cover and the maintenance cover must be removed for maintenance operations on the belt drive.

Remove maintenance cover. To do so, undo the 7 fastening screws and the 2 fastening nuts.

Fig 1: Removing Maintenance Cover
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Mark belt travel direction with a colored pen.
WARNING: Risk of damage!
Never remove Polyrib belt when warm. The belt would deform and could be damaged.
Turn the tensioning roller -7- on the socket wrench (wrench size 27 mm) clockwise and simultaneously remove the belt from the drive pulleys. See Fig 2 .

Fig 2: Turning Tensioning Roller With Socket Wrench
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Visually inspect the condition of the belt and replace it if necessary. Check belt pulley for damage.
Install Polyrib (Serpentine) belt in the order shown.

Fig 3: Identifying Polyrib (Serpentine) Belt Installation Sequence
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Twist the tensioning roller -7- clockwise and simultaneously place the belt on the idler pulley -8-. . See Fig 3 Subsequently relieve the tensioning roller slowly.

Fig 4: Twisting Tensioning Roller
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Visually check whether the belt is correctly positioned on all wheels.

Refit maintenance cover and rear wall trim. The 7 fastening screws and the 2 fastening nuts are tightened to 10 Nm (7.5 ft.lb). See Fig 3 .

Fig 5: Fitting Maintenance Cover And Rear Wall Trim
Courtesy of PORSCHE OF NORTH AMERICA, INC.