Camshaft, Lifters and Push Rods: Locations

Valvetrain, Assembly Overview

Note:
^ Cylinder head for cylinder bank 2 (left) is shown in illustration.

Valvetrain, Assembly Overview:

1 - Sealing plug
2 - Valve stem seal
3 - Valve spring
^ Installed location

4 - Support element
^ With hydraulic valve clearance compensation
^ Clipped into roller rocker lever - 8
^ Do not interchange
^ Lubricate contact surface

5 - Valve spring plate
6 - Valve keepers
7 - Securing clip
^ Check for secure seat

8 - Roller rocker lever
^ Do not interchange
^ Check roller for easy movement
^ Lubricate contact surface
^ To assemble, clip onto support element - 4 - with securing clip - 7

9 - Intake camshaft
^ Check radial clearance using Plastigage(R) (roller rocker lever removed)
^ Radial clearance at bearing - dia. 24 mm: 0.024 to 0.066 mm
^ Radial clearance at bearing - dia. 36 mm: 0.032 to 0.078 mm
^ Run-out: max. 0.04 mm

10 - Gasket
^ Replace

11 - Bearing bracket
^ With integrated camshaft bearings

12 - 8 Nm
^ Observe tightening sequence

13 - Camshaft position (CMP) sensor 2 G163
14 - 9 Nm
15 - O-ring
^ Replace

16 - 9 Nm
17 - Camshaft position (CMP) sensor 4 G301
18 - O-ring
^ Replace

19 - Compression ring
^ For camshaft adjuster

20 - Exhaust camshaft
^ Check radial clearance using Plastigage(R) (roller rocker lever removed)
^ Radial clearance at bearing - dia. 24 mm: 0.024 to 0.066 mm
^ Radial clearance at bearing - dia. 36 mm: 0.032 to 0.078 mm
^ Run-out: max. 0.04 mm

21 - Cylinder head
^ Check valve guides

22 - Intake valve
^ Do not rework, only lapping is permitted
^ Mark installed position for re-installation
^ Check valve guides

23 - Exhaust valve
^ Do not rework, only lapping is permitted
^ Mark installed position for re-installation
^ Check valve guides





Installed position of valve spring
^ The tight spring coils - arrow - face toward cylinder head.