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Home >> Porsche >> 2011 >> 911 Speedster >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 13 - Engine - CRANKGEAR, Pistons -- CARRERA (997) >> WM 137419 Removing And Installing Crankshaft Sealing Ring - Belt Side (Except CARRERA 4 GTS, CARRERA 4 GTS CABRIO, Gt3, Gt2, Gt3 RS, Gt2 RS, Gt3 RS 4.0) >> Installation >> Installing Sealing Ring

Installing Sealing Ring

NOTE: Incorrect tool
  • Risk of damage to components

→ Use prescribed tool.

Tools 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: Identifying Tool And Sealing Ring
    G09816780Courtesy of PORSCHE CARS NORTH AMERICA, INC.
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.

  1. 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. 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 On Insertion Part
      G09816781Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  3. Fit sealing ring -1-  with insertion part -3-  on crankshaft flange.
    1. 3.1. Screw tool onto crankshaft flange by hand with the two cheese head bolts -2-  .
      Fig 3: Identifying Sealing Ring With Insertion Part On Crankshaft Flange
      G09816782Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  4. Assembly aid 9774 -1-  with sealing ring is fitted on 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 Assembly Aid 9774 On Crankshaft Flange
      G09816783Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  5. Pull in sealing ring.
    1. 5.1. Assembly aid 9774  is slowly screwed in clockwise using the ratchet spanner -1-  as far as it will go.
    2. 5.2. Leave the tool fitted for two minutes to allow the sealing lip to rest in position.
      Fig 5: Installing Sealing Ring
      G09816784Courtesy 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 

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