Cylinder Head, Removing and Installing

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 A, switch-off the emergency (backup) battery for the Telematic/Telephone Control Module prior to disconnecting vehicle battery.
^ After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Owner's Manual.
^ After reconnecting vehicle battery on vehicles equipped with Audi Telematics by Onstage, switch-on the emergency (backup) battery for the Telematic/Telephone Control Module.

Notes:
^ Replace cylinder head bolts.
^ When performing 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 maximum of 0.3 mm in width, or when no more than first 4 turns of spark plug threads are cracked.