Part I

Cylinder head, removing and installing

CAUTION!

Before beginning repairs on the electrical system:

Obtain the anti-theft radio security code.

Switch the ignition off.

Disconnect the battery Ground (GND) strap.

On vehicles equipped with Audi Telematics by OnStar, switch-off the emergency (back-up) battery for the Telematic/Telephone Control Module prior to disconnecting vehicle battery Communication.

After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Owners Manual.

After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar, switch-on the emergency (back-up) battery for the Telematic/Telephone Control Module Communication.

Cylinder head, removing and installing

Note:
^ Replace cylinder head bolts.
^ When performing repairs, replace seals, gaskets, self-locking nuts and bolts which have a specified tightening angle.
^ Charge air hose connections and hoses must be free from oil and grease before installing.
^ When installing a replacement cylinder head with camshafts installed, contact surfaces between valve lifter and cam running surface must be oiled after installation of cylinder head.
^ The plastic protectors installed to protect open valves must only be removed immediately before installing cylinder head.
^ When replacing cylinder head or cylinder head gasket, the coolant must be completely replaced.
^ Cylinder heads which have cracks between valve seats or between valve seat inserts and the spark plug thread can be used further without reducing service life, provided cracks do not exceed a max. of 0.3 mm in width, or when no more than first 4 turns of spark plug threads are cracked.

Part I





1 - Cylinder head gasket
^ Replace
^ Installation position: Part No. toward cylinder head
^ After replacing, fill with fresh coolant

2 - Cylinder head
^ Checking for distortion
^ Resurfacing limit
^ After replacing, fill with fresh coolant

3 - Oil deflector
^ Note installed position

4 - Cylinder head bolt
^ Replace
^ Note sequence when loosening
^ Note sequence when tightening

5 - Cylinder head cover

6 - Ignition coil

7 - Cap

8 - Gasket
^ Replace if damaged or leaking

9 - 10 Nm
^ Tighten inner nuts first
^ Tighten outer nuts in diagonal sequence

10 - Cylinder head cover gaskets
^ Replace if damaged or leaking
^ Before installing gaskets apply AMV 174 004 01 at sealing points and

11 - Gasket
^ Replace

12 - Secondary air combination valve
^ With screw connection

13 - 10 Nm

14 - Coolant flange
^ With coolant temperature sensor

15 - 10 Nm

16 - O-ring
^ Replace