Assembly Overview - Camshafts

Camshafts, bearing cover: 

Fig 1: Camshafts/Cylinder Head Components Location

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Camshafts/cylinder head

1. Intake camshaft
2. Outlet camshaft
3. Dowel sleeve, upper 7 x 11
4. Bearing cover
5. Screw, M6 x 38 - observe tightening sequence> Initial tightening 5 Nm (3.5 ftlb.)  > Torque angle 50° 
6. Screw, M6 x 38 or M6 x 70 - observe tightening sequence> Initial tightening 5 Nm (3.5 ftlb.)  > Torque angle 90°  > Initial tightening 5 Nm (3.5 ftlb.)  > Torque angle 50° 
7. Camshaft bearing saddle
8. Dowel sleeve, 6 x 25
9. Lower part of bearing saddle (only for cylinder head 3-4)
10. Lower dowel sleeve (observe different size compared to item 3)
11. Tappets for high-pressure pump

Tightening sequence for camshaft housing and bearing saddle: 

Fig 2: Camshaft Housing/Bearing Saddle Screws Tightening Sequence

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Tightening sequence for camshaft housing/bearing saddle

Camshafts: 

Fig 3: Camshafts Components Location

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Camshafts/camshaft controllers

1. Friction plate - always replace> Final tightening torque angle 40° +/- 5° 
2. Hexagon sleeve - always replace
3. Central screw, M12 x 110 for camshaft controller> Initial tightening 30 Nm (22 ftlb.) +/- 1 Nm (0.5 ftlb.) 
4. Sealing ring
5. Actuator for camshaft control on intake side
6. Actuator for camshaft control on outlet side
7. Aluminium screw, M6 x 14 - always replace> Initial tightening 4 Nm (3 ftlb.)  > Final tightening torque angle 60°