Cylinder Head, Chain Housing Cover

Location	Description	Type	Basic value	Tolerance
Hexagon nut on camshaft bearing cover	M7	Initial tightening	5 Nm
Hexagon nut on camshaft bearing cover		Torque angle	45°
Courtesy of PORSCHE CARS NORTH AMERICA, INC. Overview of cylinder head on V6 DFI engine
Fastening screws for hydraulic valve		Tightening torque	4 Nm
Courtesy of PORSCHE CARS NORTH AMERICA, INC. Hydraulic valve on camshaft controller
Fastening screws and nuts	M6	Tightening torque	10 Nm (7.5 ftlb.)
Courtesy of PORSCHE CARS NORTH AMERICA, INC. Tightening sequence for cylinder head cover
Fastening screw, upper	M6 x 20	Tightening torque	10 Nm (7.5 ftlb.)
Courtesy of PORSCHE CARS NORTH AMERICA, INC. Upper chain housing cover
Chain housing cover to cylinder head	M8 x 30	Tightening torque	23 Nm (17 ftlb.)
Chain housing cover on crankcase	M6 (different lengths)	Tightening torque	10 Nm (7.5 ftlb.)
Courtesy of PORSCHE CARS NORTH AMERICA, INC. Lower chain housing cover
Guide rail on cylinder head		Tightening torque	23 Nm

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Cylinder head 

1-6  Pistons of cylinders 1 - 6

1-20  Tightening sequence for cylinder-head screws > Initial tightening 15 Nm  > Tightening torque 30 Nm (22 ftlb.).  > Torque angle 180°