Overview - VALVETRAIN

Fig 1: Exploded View Of Valvetrain

Courtesy of AUDI OF AMERICA, LLC

1. Intake Valve
   • Do not rework, only lapping is permitted
   • Mark the installed position for reinstallation.
   • Valve Dimensions. Refer to VALVE DIMENSIONS .
   • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
2. Lower Valve Spring Retainer
3. Valve Stem Seal
   • There are different versions. Refer to the Parts Information for the allocation.
   • Replacing. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
4. Valve Spring
   • Installation position:
     • Intake Valve. Refer to Fig 2.
     • Exhaust Valve. Refer to Fig 3.
5. Upper Valve Spring Retainer
6. Valve Retainers
7. Roller Rocker Lever
   • Mark the installation position with paint for reinstallation
   • Check the roller bearing for ease of movement
   • Oil the running surfaces before installing
   • Clipped in with the clamp -item  ) Clip on the hydraulic lifter -item  ) Hydraulic Lifter
8. Clip
   • Not available separately.
   • Check for secure fit
9. Hydraulic Lifter
   • Clipped in the roller rocker lever -item  ) Roller Rocker Lever
   • Mark the installation position with paint for reinstallation
   • Oil the running surfaces before installing
10. Cylinder Head
    • Shown for cylinder bank 2 (left)
    • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
11. Exhaust Valve
    • Do not rework, only lapping is permitted
    • Mark the installed position for reinstallation.
    • Valve Dimensions. Refer to VALVE DIMENSIONS .
    • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .

Installation Position of the Intake Valve Spring 

Fig 2: Installation Position of the Intake Valve Spring

Courtesy of AUDI OF AMERICA, LLC

• The tight spring coils -arrow- face toward the cylinder head.

Installation Position of the Exhaust Valve Spring 

Fig 3: Installation Position of the Exhaust Valve Spring

Courtesy of AUDI OF AMERICA, LLC

• The color marking -arrows- points upward.