Removal the left cylinder head (Audi A8 D2)

Fig. 3.4–52. Cylinder head: 1 – front middle pipe of the cooling system; 2 – bolt, 10 Nm; 3 – sealing ring; 4 – cylinder head; 5 – guide bushing; 6 – cylinder head mounting bolts; 7 – connecting pipe of the exhaust gas recirculation system; 8 – bolt, 10 Nm; 9 – gasket; 10 – crankcase ventilation pipe; 11 – bolt, 10 Nm; 12 – vacuum pump; 13 – bolt, 10 Nm; 14 – sealing rings; 15 – bolt, 20 Nm + turn further by 90°; 16 – gasket; 17 – guide tube for oil level indicator (dipstick); 18 – bolt, 10 Nm; 19 – cylinder head gasket

Loosen the clamp, unscrew the bolt and remove the left air duct.

Fig. 3.4–53. Location of bolts securing the left exhaust gas recirculation pipe and turbocharger to the exhaust manifold

Unscrew the bolts and disconnect the left exhaust gas recirculation pipe (Fig. 3.4–53).

Remove the bolts securing the turbocharger to the exhaust manifold (see Fig. 3.4–53).

Remove the bolt securing the oil level indicator (dipstick) guide pipe to the cylinder head.

Remove the fuel heat exchanger mounting bolts.

Unscrew and remove the middle pipe of the cooling system, located behind the cylinder head.

Unscrew and remove the middle pipe of the cooling system, located behind the cylinder head.

Fig. 3.4–54. Location of crankcase ventilation hose fasteners

Unscrew and remove the crankcase ventilation hoses (Fig. 3.4–54).

Fig. 3.4–42. Location of vacuum hose (1), fuel return line clamps (2), and injector electrical connectors (3, 4, 5, 6, 7)

Disconnect the electrical connectors of injectors 3–7 (see Fig. 3.4–42).

Disconnect vacuum hose 1.

Release the fuel supply line 2 from the clamps and remove it.

Unscrew the oil filler cap.

Fig. 3.4–43. Location of the notch in the oil filler neck opening

Using the crankshaft pulley mounting bolt, turn the shaft until a recess is visible in the oil filler neck hole (see Fig. 3.4–43).

Fig. 3.4–44. Location of fuel injector housing mounting bolts

Loosen the injector housing mounting bolts, pull the housings upwards and turn them 90° counterclockwise (see Fig. 3.4–44).

Fig. 3.4–45. Location of fuel injector mounting bolts

Unscrew the exposed bolts securing the fuel injectors (see Fig. 3.4–45).

Pull up and remove the injectors for cylinders 6 and 8. You can use a lever to remove the injectors.

Turn the crankshaft clockwise 180° and remove the fuel injectors for cylinders 5 and 7.

Remove the timing belt.

Fig. 3.4–55. Location of guide roller and rear toothed belt cover mounting bolts

Remove the guide roller mounting bolt (Fig. 3.4–55).

Unscrew the bolts and remove the rear timing belt cover (see Fig. 3.4–55).

Fig. 3.4–56. Location of the electrical connector (1) and bolts (2, 3, 4) for fastening the high-pressure fuel pump

Disconnect the electrical connector from the high-pressure fuel pump (HPFP) (Fig. 3.4–56).

Unscrew mounting bolts 2,3,4 and remove the fuel injection pump.

Disconnect the electrical connector from the coolant temperature sensor.

Unscrew the mounting bolts and remove the right and middle pipes of the cooling system.