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Home >> Volkswagen >> 2003 >> Jetta GLI >> Repair and Diagnosis >> External Pages >> Different car >> Section 131 (2.0L - Cylinder Head, VALVETRAIN - Engine Code(S): CBFA & CCTA (Sedan) (A5 Platform)) >> 15 Cylinder Head, VALVETRAIN >> Description And Operation >> Cylinder Head Overview

Cylinder Head Overview

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NOTE:

Replace the cylinder head bolts.

Always replace self-locking nuts, bolts which have been tightened to a torque angle, as well as gaskets and O-rings.

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

When replacing the cylinder head or cylinder head gasket, the coolant must be completely replaced.

Fig 1: Identifying Assembly Overview: Cylinder Head
GWWA15-10656Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. Cylinder Head Gasket 
    • Always replace.
    • Note the installed position: The replacement part number must be visible from the intake side.
  2. Bolt 
    • 25 Nm
  3. Transport Strap 
  4. Bolt 
    • Always replace.
    • Follow the sequence when loosening, refer to Fig 3.
    • Tightening sequence and specification, refer to Fig 4.
  5. Cylinder Head 
  6. Bolt 
    • Always replace.
    • With a washer.
    • Follow the sequence when loosening, refer to Fig 3.
    • Tightening sequence and specification, refer to Fig 4.
  7. O-ring 
    • Always replace.
    • Lubricate with engine oil.
  8. Plug 
    • 5 Nm
    • With a ball head for the engine cover.
  9. Cap 
    • With a gasket.
  10. O-ring 
    • No replacement part available.
  11. Plug 
    • Always replace.
    • Lubricate the O-ring with engine oil.
  12. Bracket 
  13. Bolt 
    • 9 Nm
  14. Heat Shield 
  15. Bolt 
    • 20 Nm
  16. Bolt 
    • 20 Nm
  17. to the Intake Manifold/Turbocharger 
  18. Ventilation Pipe 
  19. O-ring 
    • No replacement part available.
  20. Gasket 
    • No replacement part available.
  21. Engine Cover 
  22. Bolt 
    • Tightening sequence, refer to Fig 2.
  23. Crankcase Ventilation 
    • Observe the sequence for tightening, refer to Fig 2.
  24. to the Intake Manifold 
  25. Gasket 
    • No replacement part available.
  26. Gasket 
    • Replace if damaged.
  27. Vacuum Pump 
  28. Bolts (M6 x 70) 
    • 9 Nm
  29. Bolt 
    • 9 Nm
    • Only available for engine code CBFA.
  30. Secondary Air Injection Solenoid Valve -N112- 
    • Only available for engine code CBFA.
  31. Gasket 
    • Always replace.
    • Only available for engine code CBFA.
  32. Retaining Plate 
  33. Bolt 
    • 9 Nm
  34. Connecting Piece 
  35. O-ring 
    • Always replace.
    • Lubricate with coolant.
  36. Bolt 
    • 25 Nm
  37. Transport Strap 
  38. Bolt 
    • 9 Nm
  39. Camshaft Position Sensor -G40- 
    • With a O-ring.
    • Lubricate the O-ring with engine oil before installing.
  40. Partition Plate 
Fig 2: Identifying Crankcase Ventilation - Tightening Sequence
GWWA15-10605Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Special Tools And Workshop Equipment Required 

Procedure 

-- Tighten the crankcase ventilation bolts in sequence -1 through 10- to 11 Nm.

Fig 3: Identifying Cylinder Head - Loosening Sequence
GWWA15-10474Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Procedure 

-- Remove the bolts -arrows-.

-- Loosen the cylinder head bolts in sequence -1 through 5-.

Fig 4: Identifying Cylinder Head - Tightening Sequence
GWWA15-10475Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Special Tools And Workshop Equipment Required 

Procedure 

-- Tighten the new cylinder head bolts in 3 passes in sequence -1 through 5- Using a TORX® bit as follows:

-- Tighten the new bolts -1 through 5- to 40 Nm.

-- Tighten the bolts an additional 90° (1/4) turn.

-- Tighten the bolts an additional 90° (1/4) turn.

-- Then, tighten the new bolts -arrows- to 8 Nm.

-- Then, tighten the bolts -arrows- an additional 90° (1/4) turn.

NOTE:

There is no requirement to tighten the cylinder head bolts after repairs.

Fig 5: Identifying Check Of Cylinder Head For Distortion
GWWV15-0654Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Special Tools And Workshop Equipment Required 

Procedure 

-- Check the cylinder head at several locations for distortion using the straight edge 500 mm VAS 6075 and a feeler gauge.