Overview - VALVETRAIN

Fig 1: Exploded View Of Valvetrain

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

1. Intake Valve
   • Do not rework, only Lapping is permitted
   • Valve Dimensions. Refer to VALVE DIMENSIONS .
   • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
2. Exhaust Valve
   • Do not rework, only Lapping is permitted
   • Valve Dimensions. Refer to VALVE DIMENSIONS .
   • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
3. Cylinder Head
4. Valve Stem Seal
   • Always replace after removing. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
5. Valve Spring
   • Installation position. Refer to Fig 2.
6. Valve Spring Retainer
7. valve Retainers
8. Roller Rocker Lever
   • Mark the installed position for reinstallation.
   • Check the roller bearing for ease of movement
   • Lubricate the running surfaces before installing
   • Removing and installing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .
9. Clip
   • For hydraulic lifter
10. Hydraulic Lifter
    • Do not interchange
    • Lubricate the running surfaces before installing

Installation Position of Valve Spring 

Fig 2: Installed Position Of Valve Spring

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

• The small diameter -a- faces the valve spring retainer.
• The larger diameter -b- faces the cylinder head.