Setting the timing for camshafts

→ Never turn the crankshaft against the rolling direction or when the chain tensioner is removed.

→ Proceed carefully with your work.

→ Only turn the engine at the crankshaft.

→ After working on the camshaft, re-set the valve timing.

→ Observe general warning notes and working regulations.

→ Do not use force when fitting the staking tool.

→ Make sure that the gap is equal on both sides.

→ When inserting the staking tools, do not use force to turn the camshafts against any resistance.

→ The engine must be exactly at top dead centre.

→ The opposite cylinder must be at ignition TDC.

1. Turn the crankshaft at the vibration balancer using socket-wrench insert 9714  so that the staking bore of the vibration balancer -2- is approx. 45 degrees in front of the lower staking point on the timing-case cover -1-.
   Fig 1: Staking Bore 45 Degrees In Front Of Overlapping TDC Of Cylinder 1

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Loosen camshaft controller and sprockets on the four camshafts just until they can turn freely (no wobbling). Always counter at the hexagon on the components when doing this.
   Fig 2: Sprocket

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   Fig 3: Camshaft Controller

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Unscrew engine chain tensioner. Place cloths underneath to catch drops of oil.
4. Screw in assembly chain tensioner auxiliary chain tensioner. Connect 1 bar of compressed air and slowly increase to 5.0 up to 5.5 bar (prevents the assembly chain tensioner from "crashing" against the timing chain). -arrow-
   Fig 4: Assembly Chain Tensioner

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Turn the four camshafts at the hexagon using an open-ended wrench until both staking tools 9678/1 can be fitted uniformly at the same time on the side edges (dihedron) of the two intake and outlet camshafts in question between cylinders 3/4 and 7/8. For information on possible errors, see above (section on "Information").
   Fig 5: Hexagon At Camshaft

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Position the staking tool according to the section above entitled "Correct setting and possible errors".
   2. Position the staking tool over the side edges of the two camshafts in such a way that the narrow end of the side edges of the camshafts points upwards to the staking tool. When positioning the staking tool, take into consideration the structural difference in height of the camshafts in the cylinder head. Turn the staking tool if necessary.
   3. Carefully turn the camshafts at the hexagon using an openended wrench until the staking tool can be fitted over the side edges. Then, carefully turn the camshafts alternately back and forth at the hexagon and slowly and carefully tighten the valve cover screws at the staking tool. When doing this, check that the staking tool protrudes at the same distance from the cylinder head on both sides (visual inspection with torch). Depending on the production tolerance, the staking tool may lie directly on the cylinder head or there may be a small gap. Everything is fixed correctly when the staking tool is fitted uniformly and there is no longer any play on the camshaft when the hexagon is turned.
      Fig 6: Turning Camshafts While Mounting Tool

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
      Fig 7: Uniform Mounting On Camshafts

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
      Fig 8: Staking Tool Screwed Uniformly On Cylinder Head

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   4. Set other cylinder bank in the same way (fix camshafts).
   5. Now all four camshafts are fitted uniformly and without play with both staking tools. When you inspect the camshafts with the torch, you can see no apparent gap between the side adjustment edges of the camshafts and the staking tool.
6. Insert staking pin locating pins into the staking bore on the vibration balancer -2-.

   Due to space constraints, a screw (M8 x 50-65) can also be used instead of staking pin 9595/1.

   For example: Part No.: 900.385.071.01 Screw, M8 x 50 or 999.073.411.01 Screw, M8 x 60.

   Fig 9: Staking bore in vibration balancer

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
7. Turn the crankshaft at the vibration balancer -3- so that the staking pin in the vibration balancer slips into the lower staking point on the timing-case cover -1-. At the same time, exert gentle pressure on the staking pin while turning.
   Fig 10: Staking position in timing-case cover

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
8. If you accidentally turn the vibration balancer too far, do not try to turn it back again! The staking tools must be removed and the camshafts must be turned in such a way that there is only the slightest pressure on the valve springs. Turn the crankshaft once and start the setting procedure again.
9. Camshafts and crankshaft are fixed correctly.
   • Screwed-in assembly chain tensioner with approx. 5.0 to 5.5 bar pressure.
   • Two fixed staking tools on the camshafts.
   • Staking pin fixes crankshaft in TDC of cylinder 1.
   Fig 11: Mounted tools

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
IMPORTANT: The tightening specifications for the basic engine are stored centrally (WM 1001IN TIGHTENING TORQUES, TIGHTENING SEQUENCES, ASSEMBLY OVERVIEWS FOR ENGINE (CAYENNE S, CAYENNE TURBO, CAYENNE GTS, CAYENNE TURBO S) ).
Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.
Fig 12: Sprocket
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Fig 13: Camshaft controller
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Fig 14: Camshaft adjustment
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Fig 15: Timing chain and sprockets
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
10. Screw down camshaft controller and sprockets on the four camshafts as instructed. Always counter at the hexagon on the components when doing this. Observe the following sequence

    1) Sprocket on cylinders 1 to 4 for outlet camshaft	2) Camshaft controller on cylinders 1 to 4 for intake camshaft
    3) Camshaft controller on cylinders 5 to 8 for intake camshaft	4) Sprocket on cylinders 5 to 8 for outlet camshaft

    1. Screw, M12 Tighten fully after setting timing. Screw must not be re-used for setting timing.
    2. Camshaft controller with integrated hexagon for countering
    3. Camshaft control hydraulic valve
    4. Screw, M5 x 12
    1. Double-chain camshaft drive
    2. Counter at the camshaft sprocket with an integrated hexagon
    3. Screw, M12 Tighten fully after setting timing. Screw must not be re-used for setting timing.
    4. Deflector rail
    5. Screw, M8 x 35
    6. Camshaft-to-camshaft guide pad
    1. Direction of travel
11. Remove tools.
12. Fit chain tensioner.