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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, 158419 Removing And Installing Camshaft Actuator (Includes Setting Timing) >> Installing Camshaft Actuators - Setting The Timing

Installing Camshaft Actuators - Setting The Timing

WARNING: This page is about a different variant/trim than selected.
  1. Check whether the crankshaft, the camshafts and the chain tensioners are fixed.

    Information 

    Camshaft actuator must not be disassembled! 

    G15211672Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Friction plate in camshaft actuator

    • The camshaft actuator must never be disassembled. 
    • To replace the friction plate lever it out carefully using a small slotted screwdriver -2-  .
  2. Allocate actuators to the camshafts. The actuator with the black surface -Arrow-  is for the outlet side.
    G15211673Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Distinguishing features of actuates

    1  Camshaft actuator inlet
    2  Camshaft actuator outlet
    3  TDC markings
  3. Position the actuators on the camshafts and fit timing chain. Make sure that the markings on the actuators -1-  match the cylinder head covers -2-  .
    G15211674Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    TDC markings on cylinder head cover

  4. Replace O-rings -1-  on the central valves -2-  .
    G15211675Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    O-ring on central valve

    1. 4.1  Lever out old O-ring -1-  using a plastic wedge and dispose of it.
    2. 4.2  Coat groove on central valve and new O-ring with oil.
    3. 4.3  Carefully slide O-ring over the thread and shoulder -3-  of the central valve and press it on using a plastic wedge.
    4. 4.4  Do not use sharpened tools, such as a screwdriver. Never mask the thread with tape.
  5. Remove latch on the chain tensioner -3-  .
    G15211676Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Securing chain tensioner

  6. Screw in central valves.
  7. Pre-tension the timing chain and pre-tighten central valves.

    Observe specified tightening sequence! 

    • 1st outlet, cylinder bank 2
    • 2nd intake, cylinder bank 2
    • 3rd intake, cylinder bank 1
    • 4th outlet, cylinder bank 1
    G15211677Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Control chain

    1. 7.1  Use > VAS 261 005 - hook wrench-1-  to pre-tension the actuators anti-clockwise and use > T90000 - socket E24-2-  and a torque wrench -3-  to pre-tighten the central valves.

      > Initial tightening 27 Nm (20 ftlb.) 

  8. Remove all staking tools.
    1. 8.1  > T40331 - Camshaft clamp  and adapter can now be removed.
    2. 8.2  Unscrew > T40069 - locking pin  .
    3. 8.3  Screw in stoppers with new sealing rings and tighten them.
  9. Secure central valves.
    G15211678Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Central valves

    1. 9.1  > T90001 - Counterhold tool-1-  and > T90002 - counterhold tool-2-  must be fitted on the actuators. To do this, turn the engine clockwise until the tool engages.
    2. 9.2  Tighten central valves using > T90000 - socket E24-3-  .

      > Final tightening + 30 Nm (22 ftlb.) 

      > Final tightening + 35° 

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