Removing Camshaft Timing Gear

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Incorrect handling of crankshafts

Risk of damage to the timing system

→ 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.

NOTE: Small parts falling into the timing case

Risk of engine damage

→ Do not let the diamond washer and other small parts fall into the timing case.

Turn the crankshaft at the vibration balancer so that the vibration balancer's staking bore -2- is located approx. 45° degrees in front of the lower staking point on the timing-case cover -1- .

Fig 1: Identifying Vibration Balancer Staking Bore
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove chain tensioner. → 153519 REMOVING AND INSTALLING TIMING CHAINS ON V6 DFI ENGINES
Loosen all four screws of the camshafts (sprockets and camshaft controllers) (undo one to two turns). Counter at the respective hexagon. → Loosening camshafts (illustrated with timing-case cover removed)

Fig 2: Loosening Camshafts
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Information
- Move the camshafts carefully. Do not force .
- Turn in the other direction if necessary .
Information

A data matrix coding is shown on the staking dihedron of the camshafts. This is a square black/white dotted marking used for electronic identification purposes during the production process. This marking can be used as an aid when inserting the camshafts into the cylinder head. All four camshafts press against the valves the least when the data matrix coding is facing upwards during installation.
Turn all four camshafts so that all the data matrix codings at the adjustment edges are pointing upwards almost simultaneously (this enables the camshafts to exert the minimum amount of pressure on the valve lifters) → Camshaft position for cylinders 1 to 4 → Camshaft position for cylinders 5 to 8 . The camshafts are turned at their hexagon using an appropriate open-ended wrench → Hexagon at camshaft . Observe identical information on assembling the camshafts.

Fig 3: Identifying Camshaft Position (Cylinders 1 To 4)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 4: Identifying Camshaft Position (Cylinders 5 To 8)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 5: Identifying Camshaft Hexagon
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Loosen timing chain.
Remove screw for the respective camshaft timing gear -3- and carefully take out camshaft timing gear -2- with both hands under the timing chain. Carefully loosen camshaft timing gear from behind using a rubber hammer if necessary.

Fig 6: Identifying Timing Chain And Sprockets
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. Double-Chain Camshaft Drive
2. Camshaft Sprocket
3. Screw, M12 Tighten Fully After Setting Timing .
4. Deflector Rail
5. Screw, M8 x 35
6. Camshaft-To-Camshaft Guide Pad
1. Direction Of Travel