Cylinder head, removing: Conditions
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.
- Engine in vehicle.
- Lock carrier in service position → Lock carrier, moving to service position .
NOTE:
- All cable ties unfastened or cut open on removal are to be re-attached in same position on installation.
- Obtain and record radio anti-theft code for vehicles with coded radio.
See Caution for disconnecting Telematics battery → Cylinder head, removing and installing
- Disconnect battery Ground strap with ignition switched off.
- Drain cooling system → Cooling system, draining and filling .
- Remove intake manifold from cylinder head. → 24 - MULTIPORT FUEL INJECTION (MFI)
- Remove ribbed belt and ribbed belt tensioner → Ribbed belt, removing and installing .
- Remove toothed belt from camshaft sprocket → Toothed drive belt, removing, installing and tensioning .
- Remove air cleaner cover - arrow -.
- Disconnect wiring connectors from:
- EVAP canister purge regulator valve N80
- Mass Air Flow (MAF) sensor G70
- Wastegate bypass regulator valve N75
- Disconnect hoses 4...7.
- Disconnect hose to secondary air injection pump motor - 8 -.
- Move wires clear.
- Unbolt air cleaner housing - 9 -.
- Remove air cleaner.
NOTE:
- Vacuum line to secondary air combination valve is clipped to underside of air intake hose.
- Disconnect connector - arrow - at camshaft adjuster.
- Remove crankcase breather line - 2 -.
- Remove crankcase breather hose at cylinder head cover.
- Remove line - 1 - on secondary air combination valve on cylinder head cover and heat shield - 3 -.
- Move secondary air line slightly to one side.
- Remove heat shield.
- Remove bolts - 1 - and - 2 - of oil supply line.
- Remove bolts - 3 - for turbocharger.
- Disconnect connector - arrow - at coolant temperature sensor G2/G62.
- Disconnect vacuum hose - arrow - at combination valve.
- Remove coolant flange, bolts - 2 - and - 3 -.
- Remove bracket - 1 - for oil supply line.
- Unclip all wiring on cylinder head and move it clear.
- Pull off coolant hose to heater unit heat exchanger at rear of cylinder head. To do so, first release retainers on connecting flange.
- Remove Ground wire - 2 -.
- Disconnect connectors - 3 -.
- Move wiring clear.
- Pull out ignition coils - 1 -.
- Loosen nuts - arrows - on cylinder head cover and remove cylinder head cover.
- Remove both oil deflectors.
- Keep to specified sequence and loosen cylinder head bolts.
- Remove cylinder head.