VALVETRAIN Assembly Overview

Fig 1: Identifying Assembly Overview: Valvetrain

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

1. Nut, 5 Nm + 45° (1/8) additional turn 
2. Exhaust Camshaft Bearing Cap 
   • Installation order, refer to CAMSHAFTS .
3. Seal 
   • If the seal is leaking, replace completely.
   • Lightly lubricate the contact surface of the seals when installing the control housing.
   • Do not spread the seals excessively when installing.
4. Exhaust Camshaft 
   • Check the radial clearance using Plastigage, Wear limit: 0.1 mm.
   • Runout: Max. 0.04 mm.
   • Checking axial play, refer to CAMSHAFT AXIAL PLAY, CHECKING .
   • Identification and timing, refer to CAMSHAFT IDENTIFICATION AND VALVE TIMING .
   • Removing and installing, refer to CAMSHAFTS .
5. Control Housing 
   • Lightly lubricate the contact surfaces of the oil seals before installing.
   • Disassembling and assembling, refer to Fig 2.
   • Check the control housing strainer for contamination before installation. refer to Fig 3.
   • Removing and installing, refer to CAMSHAFTS .
6. Camshaft Roller Chain 
   • Mark direction of rotation before removing (installed position). Refer to Figure.
   • Installing, refer to VALVE TIMING, ADJUSTING .
7. Exhaust Camshaft Adjuster 
   • Identification: 32A.
   • Rotate the engine only with the camshaft adjuster installed and the chain installed.
   • Installing, refer to VALVE TIMING, ADJUSTING .
8. Bolt, 60 Nm + 90° (1/4) additional turn 
   • Always replace.
   • The contact surface of the sensor wheel and the bolt head must be dry when installing.
   • To remove and install, counter hold the camshaft using a 32 mm open end wrench. Refer to CAMSHAFTS .
9. Intake Camshaft Adjuster 
   • Identification: 24E.
   • Rotate the engine only with the camshaft adjuster installed and the chain installed.
   • Installing, refer to VALVE TIMING, ADJUSTING .
10. Cylinder Head Height 
    • Minimum height: -a- = 139.9 mm.
11. Valves 
    • Do not rework, only lapping is permitted
    • Valve dimensions, refer to VALVE DIMENSIONS .
12. Cylinder Head 
    • Check for distortion, refer to Figure.
    • Removing and installing, refer to CYLINDER HEAD .
    • Refacing valve seats, refer to VALVE SEAT, REFACING .
    • After replacing, replace the coolant.
13. Support Element 
    • Before installing, check the axial play in the camshafts. Refer to CAMSHAFT AXIAL PLAY, CHECKING .
    • Do not interchange.
    • With hydraulic valve clearance compensation.
14. Valve Stem Seal 
    • Replacing, refer to VALVE STEM SEALS .
15. Securing Clip 
    • Check for secure seating.
16. Roller Rocker Lever 
    • Before installing, check the axial play in the camshafts. Refer to CAMSHAFT AXIAL PLAY, CHECKING .
    • Do not interchange.
    • Check the roller for easy movement.
    • Lubricate the contact surface.
    • Use the securing clip to clip onto the support element when installing.
17. Valve Spring 
    • Note the installed position.
    • Removing and installing, refer to VALVE STEM SEALS .
18. Valve Spring Plate 
19. Valve Retainers 
20. Intake Camshaft Bearing Cap 
    • Installed order, refer to CAMSHAFTS .
21. Intake Camshaft 
    • Check the radial clearance using Plastigage, Wear limit: 0.1 mm.
    • Runout: Max. 0.04 mm.
    • Checking axial play, refer to CAMSHAFT AXIAL PLAY, CHECKING .
    • Identification and timing, refer to CAMSHAFT IDENTIFICATION AND VALVE TIMING .
    • Removing and installing, refer to CAMSHAFTS .

Fig 2: Identifying Control Housing, Assembly Overview

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

1 - Guide rail: clipped on the control housing

2 - Control housing

3 - Camshaft adjustment valve 1

4 - Camshaft adjustment valve 1 (exhaust)

5 - 8 Nm, install with locking compound

Fig 3: Identifying Check For Soiling On Strainer Of Control Housing

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Unclip the strainer -2- at the rear of the control housing -1- and remove any possible contamination.

Fig 4: Identifying Marks On Roller Chains

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.