Note. The sequence of operations for removing and installing the actuating units of the VANOS system is different.
The removal of the right-hand intake and exhaust VANOS control units on cylinder bank 1-4 must be carried out in the same manner as on cylinder bank 5-8 and must be taken into account.
Remove the right eccentric shaft adjustment drive motor, right engine cylinder head cover, unscrew all spark plugs 1-4, fan cover and right timing cover.
Turn the crankshaft at the central bolt in the direction of rotation to the TDC position of the end of the compression stroke in the 1st cylinder. At the same time, the cam (left arrow, see fig. 5.124) exhaust valves of the 1st cylinder are inclined upwards. Inlet camshaft cam - obliquely down (right arrow).
The exhaust actuator on the side of cylinders 1–4 has an additional metal clip (3, fig. 5.143) to drive the vacuum pump.
Assemble the engine.