Overview - Cylinder Head

Fig 1: Overview Of Cylinder Head (Left Side Shown)

Courtesy of AUDI OF AMERICA, LLC

1. Cylinder Head Gasket
   • Replacing, refer to CYLINDER HEAD, REMOVING AND INSTALLING .
   • Installed position: the part number faces the cylinder head
   • Change the coolant and engine oil after replacing
2. Cylinder Head
   • Removing, refer to CYLINDER HEAD, REMOVING AND INSTALLING .
   • Check for distortion, refer to Fig 2
   • Reworking dimension, refer to Fig 3
   • Installing, refer to INSTALLING .
   • Change the coolant and engine oil after replacing
3. Bolt
   • Tightening specification: 9 Nm .
4. Vacuum Pump
5. O-Ring
   • Replace
6. Bolt
   • 20 Nm
7. Engine Lifting Eye
8. Camshaft Position Sensor, Intake Camshaft
   • Cylinder bank 1 (right) Camshaft Position Sensor -G40-
   • Cylinder bank 2 (left) Camshaft Position Sensor 2 -G163-
9. Bolt
   • 9 Nm
10. Bolt
    • Loosening procedure (See Figure).
    • Replace
    • Loosening procedure (See Figure).
    • Tighten in 3 stages:

      -- Tighten to 40 Nm

      -- Tighten an additional 90°

      -- Tighten an additional 90°

11. Ignition Coil
    • Remove with Puller - Ignition Coil T40039
12. Cylinder Head Cover
    • Removing and Installing: For left, refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING , for right, refer to RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING 
13. Seal
    • Replace if damaged or leaking
14. Cap
15. Bolt
    • Replace if the seal is damaged
    • Tightening specifications, refer to Fig 5 and Fig 6.
16. Bolt
    • Tightening specification, refer to OVERVIEW - IGNITION SYSTEM .
17. Connector Strip
    • For the ignition coils
18. Cylinder Head Cover Gasket
    • Replace if damaged or leaking
19. Bolt
    • 2.5 Nm
20. Solenoid Valve for Camshaft Adjustment - Exhaust Side
    • Cylinder bank 1 (right) Exhaust Camshaft Control Valve 1 -N318-
    • Cylinder bank 2 (left) Exhaust Camshaft Adjustment Valve 2 -N319-
21. Solenoid Valve for Camshaft Adjustment - Intake Side
    • Cylinder bank 1 (right) Camshaft Adjustment Valve 1 -N205-
    • Cylinder bank 2 (left) Camshaft Adjustment Valve 2 -N208-
22. O-Rings
    • Replace
23. O-Ring
    • Replace
24. Bolt
    • 9 Nm
25. Camshaft Position Sensor, Exhaust Camshaft
    • Cylinder bank 1 (right) Camshaft Position Sensor 3 -G300-
    • Cylinder bank 2 (left) Camshaft Position Sensor 4 -G301-

Fig 2: Checking Cylinder Head For Distortion

Courtesy of AUDI OF AMERICA, LLC

-- Check the cylinder head at several locations for distortion using a Straight Edge - 500mm VW6075 and a feeler gauge.

• Maximum permitted distortion: 0.05 mm.

Fig 3: Cylinder Head Refacing Dimension

Courtesy of AUDI OF AMERICA, LLC

Resurfacing cylinder head (face grinding) is only permissible to minimum dimension -a-.

• Minimum dimension -a- = 139.20 mm.

Fig 4: Identifying Oil Dipstick Guide Tube Bolt

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-- Tighten the bolt -arrow- to 9 Nm.

Cylinder Head Cover Bolt Tightening Sequence 

Fig 5: Identifying Left Cylinder Head Cover Bolt Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts to 9 Nm in the following sequence: -1 to 12-.

Fig 6: Identifying Right Cylinder Head Cover Bolt Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts to 9 Nm in the following sequence: -1 to 12-.