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Home >> Volkswagen >> 2007 >> Golf Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 163 (1.9L - Cylinder Head, VALVETRAIN - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) >> 15 Engine - Cylinder Head, VALVETRAIN >> Description And Operation >> VALVETRAIN Assembly Overview

VALVETRAIN Assembly Overview

WARNING: This page is about a different car, the 2006 Volkswagen Jetta and 2005 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

When using an exchanged cylinder head with camshaft installed, the contact surfaces between the lifters and cam lobes must be lubricated before installing the cylinder head cover.

The plastic protectors installed to protect the open valves must only be removed immediately before fitting the cylinder head.

When cylinder head is replaced, all coolant must also be replaced.

Cylinder heads with cracks between the valve seats can continue to be used without reducing service life, as long as the tears have a width of max. 0.5 mm.

Do not mill the valve seats in the cylinder head; only grinding of the valves is permissible.

After installing the camshafts, the engine may not be started for approximately 30 minutes. The hydraulic equalization elements 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 2 full revolutions before starting to be sure that valves do not strike the pistons.

Always replace gaskets and seals.

Fig 1: Identifying Valvetrain Assembly Overview
GWWN15-0231Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. 20 Nm + 90° ( 1  / 4  turn) additional turn 
    • Replace
    • Follow sequence for loosening and tightening CAMSHAFT .
  2. Rocker arm axle 
    • Do not interchange
  3. Cylinder head bolt 
    • Replace
    • Follow sequence for loosening and tightening CYLINDER HEAD .
    • Before installing, insert shims into cylinder head, refer to "Washer" in item:  4
  4. Washer 
    • For cylinder head bolts
    • Insert into cylinder head before assembling bearing caps
  5. Valve lifter 
    • Do not interchange
    • with hydraulic valve clearance compensation
    • place on running surface when setting down
    • Before installing, check axial play of camshafts CAMSHAFT, CHECKING AXIAL PLAY 
    • Lubricate contact surface
    • Before removing, remove bearing caps for camshaft
  6. Valve keepers 
  7. Valve spring plate 
  8. Outer valve spring 
    • Removing and installing, cylinder head removed: With valve spring compressor 2037
    • Removing and installing, cylinder head installed: VALVE STEM SEALS .
  9. Inner valve spring 
    • Removing and installing, cylinder head removed: With valve spring compressor 2037
    • Removing and installing, cylinder head installed: VALVE STEM SEALS .
  10. Valve stem seal 
  11. Valve guide 
  12. Pump-injector unit 
  13. Cylinder head 
    • When using an exchanged cylinder head with camshaft installed, the contact surfaces between the lifters and cam lobes must be lubricated before installing the cylinder head cover.
  14. Seal 
    • Do not additionally oil or grease sealing lip of oil seal
    • Before installing, remove oil remains from camshaft journal with a clean cloth.
    • To install, tape over the groove on the taper of the camshaft with commercially available adhesive strip (e.g. scotch tape)
    • Removing and installing CAMSHAFT SEAL .
  15. Valves 
  16. Bearing shell 
    • Do not interchange used bearing shells (mark)
    • Make sure retaining tabs are engaged properly in bearing caps and cylinder head
  17. Camshaft 
  18. Bearing cap 
  19. 8 Nm + 90° ( 1  / 4  turn) additional turn 
    • Replace
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