Camshaft, Lifters and Push Rods: Service and Repair
Valvetrain Assembly Overview
1 Bolt
• Replace
• 8 Nm + 90° (1/4) additional turn.
2 Guide Frame
• Removing and installing, refer to => [ Camshafts ] Service and Repair.
• With integrated camshaft bearings.
• Clean sealing surface, reworking is not permitted.
• Remove old sealant residue.
3 Exhaust Camshaft Sprocket
4 Bolt
• Replace
• 60 Nm + 90° (1/4) additional turn.
5 Bolt
• Replace
• 60 Nm + 90° (1/4) additional turn.
6 Intake Camshaft Adjuster
7 Seals
• For the camshaft adjuster.
• Note the installed position, refer to => [ Camshafts ] Service and Repair.
8 Timing Chain
• Removing from sprocket/adjuster. Refer to => [ Valve Timing, Adjusting ] Adjustments.
9 Cylinder Head
• Do not regrind the valve seats, only lapping is permitted.
10 Hydraulic Adjusting Element
• Do not interchange.
• Lubricate contact surface.
11 Valve Retainers
12 Top Valve Spring Retainer
13 Valve Spring
14 Valve Stem Seal
• Replacing, refer to => [ Valve Stem Seals ] Service and Repair.
15 Valve Guide
• Checking, refer to => [ Valve Guide, Checking ] Testing and Inspection.
16 Intake Valve
• Do not regrind, only lapping is permitted.
• Valve dimensions. Refer to => [ Valve Dimensions ] [1][2]Specifications.
• Check valve guides. Refer to => [ Valve Guide, Checking ] Testing and Inspection.
17 Exhaust Valve
• Do not regrind, only lapping is permitted.
• Valve dimensions. Refer to => [ Valve Dimensions ] [1][2]Specifications.
• Check valve guides. Refer to => [ Valve Guide, Checking ] Testing and Inspection.
18 Sealing Plugs
• Replace
• Installing, refer to => [ Camshafts ] Service and Repair.
19 Intake Camshaft
• Removing and installing, refer to => [ Camshafts ] Service and Repair.
• Check radial clearance using Plastigage (roller rocker lever removed).
Wear limit: 0.1 mm.
• Runout: maximum 0.035 mm.
• Axial play: maximum 0.17 mm.
20 Exhaust Camshaft
• Removing and installing, refer to => [ Camshafts ] Service and Repair.
• Check radial clearance using Plastigage (roller rocker lever removed).
Wear limit: 0.1 mm.
• Runout: maximum 0.035 mm.
• Axial play: maximum 0.17 mm.