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 → Screwing in tool  . 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: Identifying Valve Lock Tool

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   Fig 2: Identifying Locking Valves

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2. Fit the tool on the cylinder head and adjust it.
   1. 2.1. Screw holder -1-  with the appropriate thread into its matching thread on the cylinder head. The hook piece -2-  is pre-fitted in the holder.
      Fig 3: Identifying Hook Assembly

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   2. 2.2. Insert a suitable plastic guide -1-  instead of the tappet.
      Fig 4: Inserting Plastic Guide

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   3. 2.3. Insert assembly cartridge -1-  for the valve keys into the plastic guide.
      Fig 5: Inserting Assembly Cartridge For Valve Keys Into Plastic Guide

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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 used without tilting.
      Fig 6: Attaching Bar Into Hook Tool

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

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      Fig 8: Pressing Down Lever And 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 in the assembly cartridge -2-  and are held there. The knurled screw retracts.
      Fig 9: Turning Knurled Screw Back And Forth

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

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   4. 3.4. Pull out the knurled screw from the assembly cartridge -1-  and tap out the valve keys -2-  .
      Fig 11: Identifying Assembly Cartridge And Valve Keys

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4. Remove valve springs, concave washer and valve keys from the cylinder head.
5. Remove valve locks and push the valves to the side of the combustion chamber.