Installing Pulley (Vibration Balancer)

Information 

The tightening specifications for the basic engine are stored centrally.

> Refer to 1X001N Technical values in the appropriate service information. 

> Refer to 2X001N Technical values in the appropriate service information. 

or

> 1001IN TIGHTENING TORQUES, TIGHTENING SEQUENCES AND ASSEMBLY OVERVIEWS

Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.

Information 

• A feather key is inserted into the crankshaft. When fitting the vibration damper (crankshaft pulley), make sure that the feather key slots into the groove.
• The feather key must not fall into the engine.
• Vibration damper (crankshaft pulley) and crankshaft stub must be cleaned.

1. Position vibration damper (crankshaft pulley) onto the crankshaft stub. Press the vibration damper slightly towards the engine, while at the same time turning it until it slips towards the timing-case cover. When doing so, be careful of the feather key.

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   Pulley on crankshaft stub

2. New  central screw must be fitted hand-tight. >

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   Central screw in crankshaft

   Information 

   Protect the radiator fins using cardboard or a sheetmetal panel to prevent damage.

   Cover wing and peripheral parts to protect them.

3. > 9679/1 - Counter-hold tool  must be inserted into the vibration damper and turned until it locks. Get another worker to use the counter-hold tool.

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   Counter-hold tool in vibration damper

4. Using a torque wrench and a suitable socket (width across flats 27), tighten the central screw > and only  carry out step-by-step torque tightening 

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   Large torque wrench on central screw

   Fig 1: Pulleys Components Location

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   Pulleys

   1	Water pump pulley
   2	Fastening screw, M8 x 16
   3	Vibration damper
   4	Fastening screw, M18 x 1.5 x 72; always use a new screw.
   5	Power-steering pump/tandem pump pulley
   6	Fastening screw, M8 x 16

   NOTIFICATION 

   Incorrect handling of tools 

   • Risk of damage to the body 

     → Only use tools approved by Porsche.

     → Always ensure that the tool Is seated correctly.

     → Protect the body and Interior of the vehicle from damage with protective covers.

     → Cover delicate components with cardboard or sheetmetal panels.

5. After tightening to the specified torque, mark the vibration damper and central screw for torque-angle tightening using a water-resistant marker. To do this, make an initial mark on the vibration damper and central screw at the same position -1 and 2-  , Make a final mark in accordance with the specified torque angle only on the vibration damper

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   Markings on vibration damper and central screw (viewed from above)

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   Markings on vibration damper and central screw (different view)

   Carry out the torque-angle tightening procedure so that the mark on the screw is turned from the initial mark on the vibration damper step-by-step (repositioning the tools repeatedly) to the final mark on the vibration damper -arrow-  . This concludes the torque-angle tightening procedure.

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   Use of tool for vibration damper