Cylinder Head, Camshafts, Camshaft Housing

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Cylinder head

Fig 1: Tightening Sequence For Cylinder Head Nuts

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Camshaft housing

Fig 2: Tightening Sequence For Camshaft Housing

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Designation	Thread	Method	Value	Note
Cylinder head nut	M10	Initial tightening	30 Nm (22 ft. lb.)	Observe tightening sequence items 1 to 12 . Coat sealing surface and threaded bolt lightly with engine oil.
	M10	Loosen all nuts
	M10	Joining torque	20 Nm (15 ft. lb.)
	M10	Subsequent tightening	20 Nm (15 ft. lb.)
	M10	Final tightening torque angle	2 x 75° ± 5°
Guide/tensioning rail to crankcase bolt a/f 8	M16 x 1.5	Torque	31 Nm (23 ft. lb.)	Replace sealing ring.
Guide/tensioning rail to chain housing	M16 x 1.5	Torque	31 Nm (23 ft. lb.)	Replace sealing ring.
Oil guide to camshaft housing	M5 - 8.8	Torque	7 Nm (5 ft. lb.)	Use magnetic wrench insert.
Camshaft controller to intake camshaft	M12 x 1.5 x 130 (10.9)	Initial tightening	50 Nm (37 ft. lb.)	Replace screw and friction plate Lightly oil the sealing surface
Camshaft controller to intake camshaft	M12 x 1.5 x 130 (10.9)	Torque angle	110° ± 5°
		Torque angle	120°
Sprocket to outlet camshaft	M12 x 1.5	Initial tightening	30 Nm (22 ft. lb.)	Replace screw. Lightly oil the sealing surface
Sprocket to outlet camshaft	M12 x 1.5	Torque angle	90° ± 5°	Replace screw. Lightly oil the sealing surface
Camshaft bearing cover	M6 x 30 - 10.9	Torque	13 Nm (9.5 ft. lb.)
Guide rails	M6 x 25 - 10.9	Torque	10 Nm (7.5 ft. lb.)
Camshaft housing to cylinder head	M8 - 10.9	Initial tightening	23 Nm (17 ft. lb.)	Observe tightening sequence -items 1 - 18- Lightly oil thread and bearing surface
Camshaft housing to cylinder head	M8 - 10.9	Final tightening	28 Nm (21 ft. lb.)
Camshaft housing cover	M6 - 10.9	Torque	10 Nm (7.5 ft. lb.)	Tighten evenly from the inside out. Drei Bond 2210 sealant
Solenoid hydraulic valve for intake camshaft control	M6 - 8.8	Torque	10 Nm (7.5 ft. lb.)	Replace O-ring
Solenoid hydraulic valve for outlet valve lift adjustment	M6 10.9	Torque	10 Nm (7.5 ft. lb.)	Replace O-ring
Driver for turbocharger suction pump to intermediate shaft	M18 - 1.5	Torque	25 Nm (19 ft. lb.)
Tandem pump/oil suction pump to camshaft housing	M6 - 10.9	Torque	10 Nm (7.5 ft. lb.)	Replace O-ring
Vacuum line to tandem pump	M6 - 10.9	Torque	10 Nm (7.5 ft. lb.)	Replace O-rings
Cover on cylinder head	M6 - 10.9	Torque	10 Nm (7.5 ft. lb.)	Replace O-ring
Pressure line to turbocharger	M6 - 10.9	Torque	10 Nm (7.5 ft. lb.)
Return line to suction pump for turbocharger on crankcase	M6 - 10.9	Torque	10 Nm (7.5 ft. lb.)