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Home >> Porsche >> 2023 >> Cayenne Base, 4D Utility Coupe >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (15 Engine - Cylinder Head, Valve Drive 4.0L -- 9YA - Cayenne (9YA)) >> WM, 156120 Removing And Reinstalling Valves >> Installing Valves

Installing Valves

WARNING: This page is about a different variant/trim than selected.
  1. Insert valves at their original position in the cylinder head and secure with adhesive tape to prevent them from slipping out.
  2. Position cylinder head on the > VAS 6419 - cylinder head tensioning device  again and tighten it.
  3. Fit air cushions on the relevant valve discs.
    G15211568Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Cylinder head tensioning device

    1. 3.1  > VAS 6419 - Cylinder head tensioning device  must now be connected to compressed air.
    2. 3.2  Using the lever -Arrow-  , push the air cushion under the combustion chamber on which you want to install the valves.
    3. 3.3  Let compressed air flow into the air cushion until it is touching the valve discs.
  4. Pick up valve keys with assembly cartridge VAS 5161/8A. 
    1. 4.1  Insert valve keys into the insertion device VAS 5161/18. 
      1. 4.1.1  The large diameter of the valve keys must be facing upwards.
    2. 4.2  Press assembly cartridge VAS 5161/8A  onto the valve keys from above and pick up the valve keys.
  5. Insert valve springs and valve-spring plates in their original position. Observe installation positions.
    1. 5.1 Installation position of valve springs - intake valve:  The closely spaced spring coils are facing down towards the cylinder head.
    2. 5.2 Installation position of valve springs - outlet valve:  The colored markings must be facing upwards.
  6. > VAS 5161A/43 - Guide plate  must now be secured to the cylinder head.
  7. Insert assembly cartridge VAS 5161/8A  into the > VAS 5161A/43 - guide plate  .
  8. Install valve keys.
    1. 8.1  Press pressure fork VAS 5161/2  down, pull knurled screw on the assembly cartridge VAS 5161/8A  upwards by turning it back and forth, thereby inserting the valve collets.
    2. 8.2  Relieve pressure on the pressure fork VAS 5161/2  whilst pulling in the knurled screw.
    3. 8.3  Continue in the same way for the remaining valves.
  9. Remove cylinder head from > VAS 6419 - cylinder head tensioning device  and remove special tool from the cylinder head.
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