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. PTFE sealing ring with support ring for crankshaft flange on belt side
   Fig 1: Overview Of Special Tool

   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 whet 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 sealing ring -2-  dry on the insertion part -1-  . When doing so, only press on the support ring -3-  .
   1. 2.1. Do not use lubricants.
      Fig 2: Identifying Sealing Ring

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Fit sealing ring -1-  with insertion part -3-  on crankshaft flange.
   1. 3.1. Screw tool onto the crankshaft flange by hand with the two cheese head bolts -2-  .
      Fig 3: Identifying Crankshaft Flange Sealing Ring With Insertion Part

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Assembly aid 9774 -1-  with sealing ring must be fitted on the insertion part.
   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 Crankshaft Flange Assembly Aid 9774

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Pull in sealing ring.
   1. 5.1. Assembly aid 9774  must then be turned slowly clockwise as far as it will go using the ratchet -1-  .
   2. 5.2. Leave the tool fitted for two minutes to allow the sealing lip to settle into position.
      Fig 5: Pulling 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 supporting sleeve on the tool after installing to protect the edges of the tool.
7. Check that the sealing ring is seated correctly and straight using calliper gauge.
   1. 7.1. To do this, measure at four points 90° apart from the crankshaft flange surface to the sealing ring (flat surface).

      → Dimension: 2.7 mm+/-0.3 mm