Removing Crankshaft Sealing Ring

Information 

• Work on delicate engine parts must be carried out conscientiously and precisely. 
• Use a suitable tray. 
• Absolute cleanliness is essential. 

Crankshaft flange sealing ring -1-: 

Fig 1: Identifying Crankshaft 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. Carefully remove small edges or burrs on the chamfer of the crankshaft flange with an oilstone.
   1. 1.1. Then, carefully remove metal chips and residual dirt from the crankshaft journal and the crankcase bore using a clean, lint-free cloth soaked in solvent naphtha or acetone.
      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.

2. If there are corroded areas on the crankshaft flange, only use a metal-polishing pad to remove these.
   1. 2.1. Then, carefully clean the flange using a clean, lint-free cloth that has been soaked in solvent naphtha or acetone.
      NOTE: Drilling work on crankshaft sealing ring

      • Risk of engine damage caused by drilling chips
      • Risk of damage to the crankcase
      • Do not apply pressure while drilling

      → Carefully remove drill chips

      → Drill carefully

3. Drill the crankshaft sealing ring -1-  at two opposite positions -arrows-  using a greased drill bit (ø 2 mm) -2-  and carefully remove chips.
   Fig 2: Drilling Sealing Ring For Removal

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Screw extractor tip of tool Mod. G puller for sealing rings Nr.168-1 -1-  into the bores alternately and pull the sealing ring out evenly.
   Fig 3: Pulling Sealing Ring Using Puller No. 168-1

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. 4.1. Alternatively, screw two tapping screws into the bores -arrows-  .
      Fig 4: Tapping Screw Using Hammer Kit No. 168

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   2. 4.2. Pull sealing ring off alternately using slide hammer kit Nr.168  at the tapping screws.

      Information 

      Visually inspect the crankshaft flange and crankcase bore for damage.

5. Check crankshaft flange and crankcase bore for damage.
6. Clean the crankshaft flange again using the metal-polishing pad if necessary.
   1. 6.1. Then, carefully remove grease from the flange and crankcase bore using a clean, lint-free cloth soaked in solvent naphtha or acetone.
   2. 6.2. 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).