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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 >> Removing Valves

Removing Valves

WARNING: This page is about a different variant/trim than selected.
CAUTION: Pointed or sharp objects 
  • Risk of cracks, pricks or cuts 
    • → Wear personal protective gear.
  1. Secure valves on the valve discs with adhesive tape to prevent them from slipping out.
  2. Prepare guide plate
    G15211563Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Guide plate on cylinder head

    1. 2.1  Screw in M8 hexagon socket head bolts with a large bolt head diameter -Arrow-  from > VAS 5161A - removal and installation device for valve cotters  on the underside of the > VAS 5161A/43 - guide plate-1-  .
  3. > VAS 6419 - Cylinder head tensioning device  must be inserted into the > VAS 6095A - engine and gearbox bracket  . Then position the cylinder head on the > VAS 6419 - cylinder head tensioning device  and tighten it. > Cylinder head tensioning device 
    G15211564Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Cylinder head tensioning device

  4. Fit air cushions on the relevant valve discs.
    G15211565Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Cylinder head tensioning device

    1. 4.1  > VAS 6419 - Cylinder head tensioning device  must now be connected to compressed air.
    2. 4.2  Using the lever -Arrow-  , push the air cushion under the combustion chamber on which you want to remove the valves.
    3. 4.3  Let compressed air flow into the air cushion until it is touching the valve discs.
  5. > VAS 5161A/43 - Guide plate-1-  must now be secured to the cylinder head.
    G15211566Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Screws on guide plate

    1. 5.1  > VAS 5161A/43 - Guide plate-1-  on the cylinder head must be aligned above the relevant combustion chamber. Observe markings A - Outlet side/E - Intake side  while doing this.
    2. 5.2  Tighten screws -Arrows-  to > Tightening torque 9 Nm (6.5 ftlb.)  .
    3. 5.3  Fit punch -2- VAS 5161/3A  on the valve-spring plate and loosen any tight valve keys by tapping them with a plastic hammer.
  6. Remove valve springs with valve-spring plates.
    G15211567Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Removing valve keys

    1. 6.1  Secure retainer VAS 5161/6  using guide fork -1-  and M8 threaded bolt VAS 5161/5  to the > VAS 5161A/43 - guide plate  . > Removing valve keys 
    2. 6.2  Insert assembly cartridge -2- VAS 5161/8A  into the guide plate.
    3. 6.3  Engage pressure fork -3- VAS 5161/2  on the retainer -1- VAS 5161/6. 
    4. 6.4  Press assembly cartridge -2- VAS 5161/8A  down and turn the knurled screw -Arrow-  on the assembly cartridge -2- VAS 5161/8A  to the right at the same time until the tips engage in the valve keys.
    5. 6.5  Turn the knurled screw -Arrow-  back and forth to press the valve keys apart and engage them in the assembly cartridge -2- VAS 5161/8A.  The knurled screw -Arrow-  slips as far as it will go into the assembly cartridge -2-  .
    6. 6.6  Relieve pressure fork -3- VAS 5161/2  and remove assembly cartridge -2- VAS 5161/8A. 
    7. 6.7  Remove valve keys from the assembly cartridge -2-  .
  7. Mark the installation position of the valve springs for re-installation.
  8. Remove valve springs with valve-spring plates and sort according to installation position for re-installation.
  9. Continue in the same way for the remaining valves.
  10. Remove valves.
    1. 10.1  Remove special tool from the cylinder head.
    2. 10.2  Release cylinder head from the cylinder head tensioning device and remove it.
    3. 10.3  Remove adhesive tape from the valve discs and take valves out of the cylinder head. Sort valves according to installation position for re-installation.
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