LEMON Manuals: Even more car manuals for everyone
Home >> Porsche >> 2023 >> Cayenne Base, 4D Utility Coupe >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 27 (15 Engine - Cylinder Head, Valve Drive 2.9L -- 9YA - Cayenne (9YA)) >> WM, 156356 Replacing Valve-Stem Seals (V6 Turbo) >> Replacing Valve-Stem Seals >> Replacing Valve-Stem Seals (Cylinder Head Installed)

Replacing Valve-Stem Seals (Cylinder Head Installed)

WARNING: This page is about a different variant/trim than selected.

NOTIFICATION 

Engine damage 

  1. Prepare guide plate -1-  .
    1. 1.1  Screw in M8 hexagon socket head bolts with a large bolt head diameter -Arrows-  from > VAS 5161A - removal and installation device for valve keys  on the > VAS 5161A/38 - underside-1-  of the guide plate.
    G15210848Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Cylinder head guide plate

  2. Turn the crankshaft clockwise using > T40263 - key SW21  and > T40314 - adapter  on the belt pulley until the piston of the relevant cylinder is at the bottom dead center BDC  position.
  3. > VAS 5161A/38 - Guide plate-1-  must now be secured on the cylinder head.
    1. 3.1  > VAS 5161A/38 - 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. 3.2  Tighten screws -Arrows-  .

      > Tightening torque 9 Nm (6.6 ftlb.) 

    3. 3.3  Fit punch VAS 5161/3A -2-  from tool set > VAS 5161A - Removal and installation device for valve keys  on the valve spring seat and loosen any tight valve keys by tapping them with a plastic hammer.
    G15210849Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Screws on guide plate

  4. Build up overpressure in the combustion chamber.
    1. 4.1  Screw sealing pin VAS 5161/10  from > VAS 5161A - Removal and installation device for valve keys  tool kit into the > VAS 5161A/38 - guide plate  .
    2. 4.2  Screw > T40012 - adapter  with sealing ring hand-tight into the guide plate.
    3. 4.3  Connect compressed air with minimum pressure of 6 bar  to the > T40012 - adapter  .

      Information 

      The knurled screw slips as far as it can go into the assembly cartridge VAS 5161/8A  when picking up the valve keys.

  5. Remove valve springs using > VAS 5161A - removal and installation device for valve keys  .
    1. 5.1  Screw retainer VAS 5161/6  with guide fork -1-  and M8 threaded bolt VAS 5161/5  into > VAS 5161A/38 - the guide plate  . > Valve keys 
    2. 5.2  Insert assembly cartridge VAS 5161/8A -2-  into the > VAS 5161A/38 - guide plate  .
    3. 5.3  Engage pressure fork VAS 5161/2 -3-  on the retainer VAS 5161/6  .
    4. 5.4  Press assembly cartridge VAS 5161/8A -2-  down using pressure fork and simultaneously turn the knurled screw -Arrow-  on the assembly cartridge VAS 5161/8A -2-  to the right, until the tips engage in the valve keys.
    5. 5.5  Turn the knurled screw -Arrows-  back and forth slightly to press the valve keys apart and engage them in the assembly cartridge VAS 5161/8A -2-  .
    G15210850Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Valve keys

  6. Relieve pressure on pressure fork VAS 5161/2  and remove assembly cartridge VAS 5161/8A  .
    1. 6.1  Remove valve keys from the assembly cartridge.
  7. Mark the installation position of the valve springs and valve-spring seats for re-installation.
  8. Remove the valve springs and valve spring seats down on a suitable surface so that they cannot get mixed up and are ready for re-installation.
  9. Pull off the valve-stem seals using the > 3364 - extractor-1-  puller.
    G15210851Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Puller 3364 on cylinder head

  10. Install new valve-stem seals -4-  on the intake side.
    1. 10.1  Push assembly sleeve -3-  onto the valve stem -2-  .
    2. 10.2  Lightly oil the sealing lip on the valve-stem seal -4-  .
    3. 10.3  Insert valve-stem seal -4-  into the > 3365 - thrust piece-5-  and press it carefully press over the assembly sleeve -3-  as far as the anchor block onto the valve guide -1-  .
    4. 10.4  Remove assembly sleeve -3-  .
      G15210852Courtesy of PORSCHE CARS NORTH AMERICA, INC.

      Installing valve-stem seal on intake side

  11. Install new valve-stem seals -4-  on the outlet side.
    1. 11.1  Push assembly sleeve -3-  onto the valve stem -2-  .
    2. 11.2  Coat sealing lip of the valve-stem seal -4-  with oil.
    3. 11.3  Insert valve-stem seal -4-  into the > T40376/2 - thrust piece-5-  and press it carefully over the assembly sleeve -3-  as far as the anchor block onto the valve guide -1-  .
    4. 11.4  Remove assembly sleeve -3-  .
    G15210853Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Installing valve-stem seal on outlet side

  12. Pick up valve keys using assembly cartridge VAS 5161/8A  .
    1. 12.1  Insert valve keys into the insertion device VAS 5161/18  , in such a way that the large diameter of the valve keys is facing upwards.
    2. 12.2  Press assembly cartridge VAS 5161/8  onto the valve keys from above and pick up the valve keys.
  13. Install valve springs and valve-spring seats.
    1. 13.1  Assign and install valve springs and valve-spring seats according to the markings made during removal.
    2. 13.2  Install valve spring for inlet valve  with closely spaced spring coils facing down towards the cylinder head.
    3. 13.3 Valve spring in exhaust valve:  Install with colored markings facing upwards.
  14. Insert assembly cartridge VAS 5161/8A  into the > VAS 5161A/38 - guide plate  .
  15. Install valve keys.
    1. 15.1  Press down the pressure fork VAS 5161/2  , pull the knurled screw on the assembly cartridge VAS 5161/8A  upwards by turning it to the left and to the right, this will insert the valve keys.
    2. 15.2  Relieve pressure on pressure fork whilst pulling on the knurled screw.
    3. 15.3  Check that all valve keys are fitted correctly.
  16. When all valves are secured again, disconnect the compressed-air connection from > T40012 - adapter  and unscrew > T40012 - adapter  .
  17. Repeat the procedure on all cylinders.
  18. Remove tools from the cylinder head.
scientia non olet · About LEMON Manuals