Installing Crankshaft Sealing Ring

→ Use prescribed tool.

Tool Overview: 

1. Assembly sleeve of special tool Assembly Aid 9774 
2. Insertion part of special tool Assembly Aid 9774 
3. Sealing ring with support ring for crankshaft flange on belt side

Fig 1: Identifying Tool 9774 With Sealing Ring

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

→ Avoid contact with caustic fluid.

→ Wear personal protective gear.

→ Ensure that there is good ventilation.

→ If you do come into contact, wash off immediately with plenty of warm water and contact a doctor if necessary.

1. Small burred spots or damaged areas on the tools can be removed with a nail file, then cleaned off with an oilstone, fine abrasive or polishing cloth.
   1. 1.1. Remove residual dirt on the tools using solvent naphtha or acetone.
   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.

2. Position the crankshaft sealing ring and support ring dry on the insertion part. Apply pressure only to the support ring when doing this.
   1. 2.1. Do not use lubricants.
      1. Insertion Part
      2. Sealing Ring
      3. Support Ring
      Fig 2: Identifying Insertion Part Sealing Ring

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Fit crankshaft sealing ring -1-  and insertion part -3-  on the crankshaft flange.
   1. 3.1. Tighten the tool hand-tight on the crankshaft flange using two cheese head bolts -2-  (hexagon socket, a/f 8).
      Fig 3: Identifying Crankshaft Sealing Ring And Insertion Part On Crankshaft Flange

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Assembly Aid 9774 -1-  must now be fitted on the insertion part with the crankshaft sealing ring.
   1. 4.1. To do this, place the hexagon-head bolt for the assembly sleeve onto the thread of the insertion part.
      Fig 4: Identifying Assembly Aid

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Insert the crankshaft sealing ring.
   1. 5.1. Assembly Aid 9774  must now be screwed in slowly clockwise as far as it will go using a ratchet -1-  .
   2. 5.2. Leave the tool fitted for two minutes to allow the sealing lip to settle into position.
      Fig 5: Inserting Crankshaft Sealing Ring

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
6. Remove assembly aid.
   1. 6.1. Undo the hexagon-head bolt and take off the assembly sleeve.
   2. 6.2. Unscrew two cheese head bolts on the insertion part and remove the component with the support ring.
   3. 6.3. Leave the support ring in position after fitting it on the tool to protect the edges of the tool.
7. Use a calliper gauge to check that the crankshaft sealing ring is seated correctly and is straight.
   1. 7.1. To check this, take measurements at four different places, offset by 90°, from the crankshaft flange surface to the crankshaft sealing ring (level surface).

      → Measured Value: 2.7 mm+/-0.3 mm