Removing Valves: Notes

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The pictures shown in this document may differ from the original.

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• 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. 

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The valve lock prevents the valves from opening while being pressed down.

1. Before removing the valves, screw in valve lock -1-  or alternatively, place a rubber plate -2-  underneath.

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   Valves secured

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   The hook piece is pre-fitted in the holder.

2. Screw in holder -1-  with hook piece -2-  .
   1. 2.1  Screw -1-  a holder with the appropriate thread into its matching thread on the cylinder head.

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   Holder with hook piece

3. Insert plastic guide -1-  .
   1. 3.1  Insert a suitable plastic guide -1-  instead of the tappet.

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   Plastic guide

4. Insert assembly cartridge -1-  for the valve keys into the plastic guide.

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   Assembly cartridge

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   Make sure that the tool and equipment can be used without tilting.

5. Engage the lever (assembly bar) -1-  in the hook and place it on the assembly cartridge.

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   Tool at correct position

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   The knurled screw on the assembly cartridge is pushed forward.

6. Press assembly cartridge -1-  with lever (assembly bar) down against the valve spring force and keep it pressed.

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   Assembly cartridge with assembly lever 

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   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.

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   The knurled screw moves back again.

7. Turn the knurled screw -1-  back and forth until the valve keys snap into place in the assembly cartridge -2-  and are held there.

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   Knurled screw

8. Remove assembly cartridge and check that both valve keys -1-  are at the correct position.

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   Valve keys in assembly cartridge

9. Pull knurled screw -1-  on the assembly cartridge and tap out the valve keys -2-  .

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   Valve keys

10. Remove valve-spring plates and valve springs.
    1. 10.1  Mark the installation position of the valve springs and valve-spring plates for re-installation.
11. Remove valve locks and push valves out to the side of the combustion chamber.