Installing Crankshaft Sealing Ring - Flywheel Side

→ Use prescribed tool.

Component overview of insertion tool 

Fig 1: Exploded View Of Insertion Tool

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Fit the assembly aid 9699/3  into the insertion tool 9699  .
   1. 1.1. To do this, unscrew the hexagon-head bolt and replace the inserts.
2. Smaller burred spots or damaged areas on the tools can be eliminated with a nail file, then remove with an oilstone, fine abrasive or polishing cloth.
   1. 2.1. Remove residual dirt on the tools using solvent naphtha or acetone.
3. Adjust the insertion tool for fitting the supporting sleeve for the sealing ring. Only unscrew the hexagon-head bolt until the groove on the assembly aid 9699/3  is flush with the contact surface of the sleeve -arrow-  .
   Fig 2: Locating Sealing Ring Mounting

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   CAUTION: Damage to the sealing lip.

   • Leaks

   → The crankshaft flange and tools must be perfectly clean and free of grease.

   → The sealing ring must be fitted dry, i.e. no oil, grease or other lubricants can be used.

   → The crankcase bore must not be oiled.

   → The sealing ring can only be positioned on the assembly tool using the supporting sleeve.

   → The new crankshaft sealing ring (PTFE) is supplied on a supporting sleeve as a spare part.

   → Do not remove the sealing ring from the supporting sleeve.

4. Slide the new crankshaft sealing ring -1-  onto the assembly aid 9699/3  with the supporting sleeve. Apply pressure on the supporting sleeve only while doing this -2-  .

   The collar of the supporting sleeve must be facing the crankshaft during assembly.

   1. 4.1. Only fit the sealing ring dry. 
      Fig 3: Sliding PTFE Sealing Ring With Supporting Sleeve Onto Tool

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5. Insertion tool 9699  must now be fitted.
   1. 5.1. Fit and secure the tool on the crankshaft flange using the two internal M8 cheese head bolts (hexagon socket, a/f 8) -arrows-  . The crankshaft flange's dowel pin must fit into the bore of the tool.
      Fig 4: Securing Insertion Tool On Crankshaft Flange

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   Information 

   Insertion tool 9699  must be left in place for about two minutes after fitting the sealing ring so that the sealing lip settles into position on the crankshaft flange.

6. Turn the hexagon-head bolt (a/f 19) clockwise as far as it will go in order to position the crankshaft sealing ring correctly on the crankshaft flange.
   1. 6.1. Leave the tool in place for two minutes.
      Fig 5: Pulling Sealing Ring

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7. Remove tool.
   1. 7.1. Turn hexagon-head bolt anti-clockwise until the guide screws are still just visible.
   2. 7.2. Loosen both hexagon socket head bolts and remove tool.
8. Check that the sealing ring is seated correctly and straight. To do this, measure at four points 90° apart from the crankshaft flange surface to the sealing ring (flat surface).

   → Dimension: 7 mm+/-0.3 mm 

9. Leave supporting sleeve on the tool following installation in order to protect the edges of the tool.
   1. 9.1. Using a small screwdriver, carefully lever off the sleeve at the bore -arrow-  and remove it.
      Fig 6: Locating Support Ring On Insertion Tool

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.