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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Engine) >> Removing And Installing Crankshaft Sealing Ring - Flywheel Side >> Installing The Crankshaft Sealing Ring

Installing The Crankshaft Sealing Ring

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NOTE:
  • The tools should be thoroughly examined for any burred spots each time a sealing ring is fitted. Even minor damage to the tool can damage the micro sealing lips of the new sealing ring!
  • The illustrations of the special tools below show their use with the engine removed and on the assembly support. Their use with the engine installed is identical.
  1. Small burred spots or damaged areas on the tools can be eliminated with a nail file, then pull off with a fine abrasive or polishing cloth. Remove residual dirt on the tools, e.g. using solvent naphtha or acetone.
  2. Check crankshaft installation position. To do this, insert special tool measuring mandrel 9699/1 across the crankshaft flange into the fitting bore of the crankcase. See Fig 1. The measuring mandrel must be placed with slight resistance in the bore. If the measuring mandrel cannot be positioned, the engine must be replaced.
    Fig 1: Inserting Special Tool Measuring Mandrel 9699/1 Into The Fitting Bore Of The Crankcase
    G03092258Courtesy of PORSCHE OF NORTH AMERICA, INC.
    NOTE:
    • The crankshaft sealing ring must not be oiled or greased. The micro sealing lips, in particular, are so sensitive that even the smallest contact can cause damage.
    • Coat only the crankshaft case bore with new oil.
  3. Coat the crankshaft case bore with new engine oil and slide the new crankshaft sealing ring over the crankshaft flange.
  4. Fit insertion tool 9699 between the two internal M8 pan-head screws, (hexagon socket a/f 8) -with hexagon socket wrench insert-  on the crankshaft flange and fasten it. The crankshaft flange's dowel pin must sit in the bore of the device.
    Fig 2: Installing Insertion Tool (9699) Between The Two Internal M8 Pan-Head Screws
    G03092259Courtesy of PORSCHE OF NORTH AMERICA, INC.
  5. To position the crankshaft sealing ring correctly on the crankshaft flange, turn an open-end/ring wrench in a clockwise direction as far as it will go on the hexagon (a/f 19) of the device. See Fig 3. Then remove the tool by releasing the pan-head screws.
    Fig 3: Positioning Crankshaft Rear Sealing Ring On The Crankshaft Flange
    G03092260Courtesy of PORSCHE OF NORTH AMERICA, INC.
  6. Install the DMF or drive plate. Make sure that the crankshaft flange is not damaged.
  7. Install the clutch pressure plate and drive plate.
  8. Refit or install the transmission.
  9. Install the engine/transmission unit if necessary.
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