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Home >> Volkswagen >> 2015 >> Jetta S, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine System (Cylinder Head & VALVETRAIN System - Service Information - 1.8L; 2.0L TFSI - CPLA, CPPA, CPKA, CPRA)) >> 15 Cylinder Head, VALVETRAIN >> VALVETRAIN >> Overview - VALVETRAIN >> Notes

Overview - VALVETRAIN: Notes

WARNING: This page is about a different variant/trim than selected.
NOTE:

The cylinder head and the cylinder head cover must be replaced together.

Do not start the engine for approximately 30 minutes after installing the camshafts. The hydraulic adjusters must seat themselves (otherwise the valves will crash into the pistons).

After working on the valvetrain and lifters, carefully rotate the crankshaft by hand at least two full revolutions to be sure that valves do not strike the pistons when starting.

Always replace gaskets and seals.

After performing work on the chain drive the adaptation value in the engine control module must be adapted. To do so, turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester:

01 - Engine Electronics 

Guided Functions 

01 - Adaptation After Repair Work On The Chain Drive 

Fig 1: Exploded View Of Valvetrain
GWWA15-11710Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. Exhaust Valve
  2. Cylinder Head
  3. Valve Stem Seal
  4. Valve Spring
  5. Valve Spring Retainer
  6. Valve Retainers
  7. Hydraulic Adjuster
    • Do not interchange
    • Lubricate contact surface
  8. Clip
    • For hydraulic adjuster
  9. Roller Rocker Lever
    • Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
    • Mark the installed position for installation later
    • Check the roller bearing for ease of movement
    • Lubricate the running surfaces before installing
  10. Exhaust Camshaft
    • Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
    • Check radial clearance using Plastigauge® (roller rocker lever removed)
    • Radial clearance: 0.024 to 0.066 mm
    • Run-out: maximum 0.04 mm
  11. Cylinder Head Cover
    • With integrated camshaft bearings
    • Clean sealing surface, reworking is not permitted.
    • Remove old sealant residue.
  12. Bolt
    • Replace after removing
    • Loosening. Refer to Figure
    • Tightening sequence. Refer to Figure
  13. Intake Camshaft
    • Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
    • Check radial clearance using Plastigauge® (roller rocker lever removed)
    • Radial clearance: 0.024 to 0.066 mm
    • Run-out: maximum 0.04 mm
  14. Alignment Pin
  15. Alignment Pin
  16. Intake Valve
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