Removing Crankshaft Sealing Ring

→ Carefully remove drill chips

→ Drill carefully

1. Spot-drill the crankshaft sealing ring -1-  at two opposite positions -arrows-  using a greased drill bit (ø 2 - 2.5 mm) and carefully remove chips.
   1. 1.1. An electric screwdriver -2-  or a small drill can be used to drill the holes.
      Fig 1: Drilling Sealing Ring

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Pull out sealing ring.
   1. 2.1. Screw the extractor tip of the tool impact puller Nr.168-1 -1-  into the bore holes alternately and pull the sealing ring out evenly.
      Fig 2: Pulling Out Sealing Ring

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   2. 2.2. Alternatively, screw two tapping screws into the bore holes.
   3. 2.3. Pull out sealing ring alternately using slide hammer kit Nr.168  at the tapping screw.
      CAUTION: The crankshaft flange can be damaged if not cleaned correctly.

      • Leaks

      → Never use an abrasive or polishing cloth or brushes with metal bristles.

      → Follow cleaning instructions.

      WARNING: Caustic fluids

      • Danger of chemical burns

      → 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.

3. Clean the flange.
   1. 3.1. Carefully clean the flange -1-  and crankcase bore using a clean, lint-free cloth soaked in solvent naphtha or acetone.
      Fig 3: Identifying Crankshaft Flange

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
      CAUTION: The crankshaft flange can be damaged if not cleaned correctly.

      • Leaks

      → Never use an abrasive or polishing cloth or brushes with metal bristles.

      → Follow cleaning instructions.

4. Check crankshaft flange and crankcase bore for damage.
   1. 4.1. Remove traces of corrosion on the flange with a metal-polishing pad (Nevr Dull  has been approved, available in car and motor bike accessory stores).
   2. 4.2. Then, carefully clean the flange using a clean, lint-free cloth that has been soaked in solvent naphtha or acetone.
   3. 4.3. Leave to dry off for at least three minutes to ensure that the vapors of the cleaning agent do not attack the new sealing ring (sealing lip).