Cylinder Head Overview
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.
- Cylinder Head Gasket
- Always replace.
- Note the installed position: The replacement part number must be visible from the intake side.
- Bolt
- 25 Nm
- Transport Strap
- Bolt
- Cylinder Head
- Check for distortion, refer to Fig 5.
- Removing and installing, refer to CYLINDER HEAD .
- Checking compression, refer to COMPRESSION, CHECKING .
- Bolt
- O-ring
- Always replace.
- Lubricate with engine oil.
- Plug
- 5 Nm
- With a ball head for the engine cover.
- Cap
- With a gasket.
- O-ring
- No replacement part available.
- Plug
- Always replace.
- Lubricate the O-ring with engine oil.
- Bracket
- Bolt
- 9 Nm
- Heat Shield
- Bolt
- 20 Nm
- Bolt
- 20 Nm
- to the Intake Manifold/Turbocharger
- Ventilation Pipe
- O-ring
- No replacement part available.
- Gasket
- No replacement part available.
- Engine Cover
- Bolt
- Tightening sequence, refer to Fig 2.
- Crankcase Ventilation
- Observe the sequence for tightening, refer to Fig 2.
- to the Intake Manifold
- Gasket
- No replacement part available.
- Gasket
- Replace if damaged.
- Vacuum Pump
- Removing and installing, refer to VACUUM PUMP .
- Bolts (M6 x 70)
- 9 Nm
- Bolt
- 9 Nm
- Only available for engine code CBFA.
- Secondary Air Injection Solenoid Valve -N112-
- Only available for engine code CBFA.
- Gasket
- Always replace.
- Only available for engine code CBFA.
- Retaining Plate
- Bolt
- 9 Nm
- Connecting Piece
- O-ring
- Always replace.
- Lubricate with coolant.
- Bolt
- 25 Nm
- Transport Strap
- Bolt
- 9 Nm
- Camshaft Position Sensor -G40-
- With a O-ring.
- Lubricate the O-ring with engine oil before installing.
- Partition Plate
Special Tools And Workshop Equipment Required
- Torque Wrench (5-50 Nm) V.A.G 1331
Procedure
-- Tighten the crankcase ventilation bolts in sequence -1 through 10- to 11 Nm.
Procedure
-- Remove the bolts -arrows-.
-- Loosen the cylinder head bolts in sequence -1 through 5-.
Special Tools And Workshop Equipment Required
- Torque Wrench (5-50 Nm) V.A.G 1331
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.
There is no requirement to tighten the cylinder head bolts after repairs.
Special Tools And Workshop Equipment Required
- Straight Edge 500 mm VAS 6075
- Feeler Gauge
Procedure
-- Check the cylinder head at several locations for distortion using the straight edge 500 mm VAS 6075 and a feeler gauge.
- Max. permissible distortion: 0.05 mm