Removing Valves

Information 

• Secure the cylinder head on a level surface, which allows easy access to the valves from underneath. 
• No valves should be hidden by the surface under the cylinder head. 
• The cylinder head fastening must not tip over when tools are used. 

1. The spark plugs must be removed and the valve lock screwed in before the valves are removed . The valve lock prevents the valves from being opened while being pressed down. Alternatively, a rubber plate placed underneath helps if the cylinder head surface is smooth -2-  .
   Fig 1: Screwing Tool

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   Fig 2: Locking Valves

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2. Fit and set the tool on the cylinder head
   1. 2.1. Screw -1-  a holder with the appropriate thread into its matching thread on the cylinder head. The hooking piece -2-  is pre-fitted in the holder.
      Fig 3: Screwing Holder On Cylinder Head

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   2. 2.2. Insert the appropriate plastic guide -1-  in place of the tappet.
      Fig 4: Inserting Plastic Guide In Tappet

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   3. 2.3. Insert assembly cartridge -1-  for the valve keys into the plastic guide.
      Fig 5: Inserting Assembly Cartridge

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   4. 2.4. Hook the lever (assembly bar) -1-  into the hook and place correctly onto the assembly cartridge. Make sure that the tool and equipment can be effective directly.
      Fig 6: Fitting Tool Onto Assembly Cartridge

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3. Remove the valve keys
   1. 3.1. Press the assembly cartridge with the lever (assembly bar) against the force of the valve-spring and keep pressed . The knurled screw of the assembly cartridge pushes forward -1-  .
      Fig 7: Pressing Assembly Cartridge And Lever

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      Fig 8: Turning Knurled Screw

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      Information 

      The mechanic must practise for use of the assembly cartridge to be effective. Some repetitions must be made to ensure that the valve keys are correctly held in place.

   2. 3.2. Turn the knurled screw back and forth -1-  until the valve keys snap into place and are held there -2-  in the assembly cartridge. The knurled screw retracts.
      Fig 9: Turning Knurled Screw

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   3. 3.3. Remove the assembly cartridge and check correct position of both valve keys -1-  .
      Fig 10: Removing Assembly Cartridge Valve Keys

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   4. 3.4. Pull out the knurled screw from the assembly cartridge -1-  and knock out the valve keys -2-  .
      Fig 11: Removing Knurled Screw From Assembly Cartridge

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Remove valve springs, spring plate and valve keys from the cylinder head.
5. Remove valve locks and push the valves to the side of the combustion chamber.