Valvetrain Assembly Overview

Valvetrain Assembly Overview





1 Seal

• Do not additionally oil or grease sealing lip of oil seal

• Before installing, remove oil remains from camshaft journal with a clean cloth

• To install, tape over the groove on the camshaft taper.

• Removing and installing, refer to --> [ Camshaft Gasket ] Service and Repair

2 10 Nm

3 10 Nm

4 Bearing Frame

• Follow the sequence for loosening and tightening. Refer to --> [ Camshafts ] Camshafts.

• Seal with silicone sealant (D 176 501 A1).

5 Exhaust Camshaft

• Removing and installing, refer to --> [ Camshafts ] Camshafts.

6 Intake Camshaft

• Removing and installing, refer to --> [ Camshafts ] Camshafts.

7 Roller Rocker Lever

• Mark installed position

• Do not interchange

• Check roller for easy movement

• Lubricate running surfaces before installing

8 Hydraulic Valve Play Balancing Element

• Mark installed position

• Do not interchange

• Lubricate the running surfaces before installing

9 Valve

• Mark installed position

• Do not rework, only lapping is permitted

• Valve dimensions, refer to --> [ Valve Dimensions ] [1][2]Specifications.

• Check valve guides. Refer to --> [ Valve Guides, Checking ] Testing and Inspection.

10 Cylinder Head

• See notes --> [ Only remove the plastic protectors installed to protect the open valves immediately before positioning the cylinder head. ] Camshafts

• Check for distortion. Refer to --> [ Checking Cylinder Head for Distortion ] Cylinder Head Assembly Overview

• Removing and installing, refer to --> [ Cylinder Head ] Cylinder Head.

• All of the coolant must be replaced after installation.

11 Valve Stem Seal

Replacing, refer to --> [ Valve Stem Seals, Cylinder Head Installed ] Service and Repair.

12 Valve Spring

13 Valve Spring Plate

14 Valve Keepers

15 Cap

• Replace

• Drive in using a suitable drift until it is flush