Cylinder head, removing and installing

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, and 2003 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

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 → 91 - COMMUNICATION

After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Repair Article and/or 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 → 91 - COMMUNICATION

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.