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Home >> Audi >> 2014 >> allroad Prestige >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 2.0L - Cylinder Head & VALVETRAIN - Engine Code(S): CPMA & CPMB >> 15 Cylinder Head, VALVETRAIN >> Cylinder Head >> Overview - Cylinder Head >> Overview - Cylinder Head, 1.8L Engine

Overview - Cylinder Head, 1.8L Engine

NOTE:

Replace the cylinder head bolts.

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

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

The engine oil and coolant must be changed if the cylinder head or cylinder head seal are replaced.

Fig 1: Overview Of Cylinder Head (1.8L Engine)
GWWA15-10654Courtesy of AUDI OF AMERICA, LLC
  1. Cylinder head gasket
    • Replace
    • Installed position: the part number faces the cylinder head
  2. Bolt
    • 25 Nm
  3. Transport strap
  4. Bolt
    • Tightening sequence. Refer to Fig 4
  5. Cylinder Head
  6. Cylinder Head Bolt
    • Replace
    • when loosening on the 1.8L engine, follow the sequence. Refer to Fig 3
    • when tightening on the 1.8L engine, follow the sequence. Refer to Fig 4
  7. O-Ring
    • Replace
    • Lubricate with engine oil
  8. Sealing Plugs
    • 5 Nm
    • with ball head for the engine cover
  9. Cap
    • With seal
  10. O-Ring
    • Replace
    • Lubricate with engine oil
  11. Sealing Plugs
  12. To the intake manifold
  13. Heat Shield
  14. Bolt
    • 20 Nm
  15. Bolt
    • 20 Nm
  16. To the intake manifold/turbocharger
  17. Ventilation pipe
  18. O-Ring
    • No replacement part
  19. Seal
    • No replacement part
  20. Engine Cover
  21. Bolt
    • Tightening sequence. Refer to Figure
  22. Crankcase Ventilation
    • Observe sequence for tightening. Refer to Figure
  23. Seal
    • No replacement part
  24. Seal
    • Replace if damaged.
  25. Vacuum Pump
  26. Bolt
  27. Connection
  28. Retaining Plate
  29. Bolt
    • 9 Nm
  30. O-Ring
    • Replace
    • Coat with coolant
  31. Transport strap
  32. Bolt
    • 25 Nm
  33. Bolt
    • 9 Nm
  34. Camshaft Position Sensor -G40-
  35. Partition Plate

Crankcase Ventilation, Tightening Sequence

Fig 2: Identifying Crankcase Ventilation - Tightening Sequence
GWWA15-10605Courtesy of AUDI OF AMERICA, LLC
NOTE:

The bolts are self-tapping. Only use Original bolts when replacing the cylinder head, since the cylinder head is delivered without a thread for the installing the crankcase housing ventilation.

It is not permitted to cut the thread with a thread cutter.

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

Fig 3: Cylinder Head Loosening Sequence
GWWA15-10474Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows-.

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

Fig 4: Cylinder Head Tightening Sequence
GWWA15-10475Courtesy of AUDI OF AMERICA, LLC

-- Tighten the cylinder head bolts in -1 to 5- sequence.

-- Partially tighten to 40 Nm using a torque wrench.

-- Turn another 90° using a rigid wrench.

-- Turn another 90° using a rigid wrench.

-- Partially tighten the bolts -arrows- to 8 Nm.

-- Tighten the bolts -arrows- 90° further using a rigid wrench.

Fig 5: Checking Cylinder Head For Distortion
GWWV15-0654Courtesy of AUDI OF AMERICA, LLC

-- Check the cylinder head in several places for distortion using a straight edge and a feeler gauge.

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