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