Cylinder Head Tightening Torque And Tightening Sequence

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.

Replace cylinder head screws.

Tighten screws in the specified sequence in four steps as follows:

Screw in as far as they will go by hand.
Tighten to 40 Nm (30 ft. lb.) until secure
Turn 90° further
Turn 90° further

Fig 1: Cylinder Head Bolt Tightening Sequence
Courtesy of PORSCHE CARS NORTH AMERICA, INC.