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. Before removing the valves, remove the spark plugs and screw in the valve lock → Screwing in tool  . The valve lock prevents the valves from opening when they are pressed down. Alternatively, a rubber plate placed underneath helps on a level cylinder head surface -2-  .
   Fig 1: Installing Valve Lock

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   Fig 2: Identifying Valve Lock And Rubber Plate

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2. Fit and set the tool on the cylinder head.
   1. 2.1. Screw a holder -1-  with a suitable thread into the matching thread on the cylinder head. The hook -2-  is pre-fitted in the holder.
      Fig 3: Fitting Cylinder Head Hook

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   2. 2.2. Insert a suitable plastic guide -1-  instead of the cam follower.
      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

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   4. 2.4. Engage a lever (assembly fork) -1-  into the hook and position it correctly on the assembly cartridge. Make sure that the tool and equipment can work straight.
      Fig 6: Installing Valve Tool

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3. Remove the valve keys.
   1. 3.1. Press the assembly cartridge down against the valve spring force using a lever (assembly fork) and keep it pressed → Pressing down tool  . The knurled screw on the assembly cartridge moves forward -1-  .
      Fig 7: Pressing Down Tool

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      Fig 8: Pressing Valve Tool Lever

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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 forward -1-  so that the valve keys engage and are held in the assembly cartridge -2-  . The knurled screw moves back again.
      Fig 9: Turning Knurled Screw

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   3. 3.3. Remove the assembly cartridge and check that the two valve keys are positioned correctly -1-  .
      Fig 10: Assembling Valve Keys

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   4. 3.4. Pull the knurled screw on the assembly cartridge -1-  and disengage the valve keys -2-  .
      Fig 11: Removing Valve Keys

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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.