11 31 005 Check engine timing of camshaft (N16)
Special tools required:
The timing is not determined at firing TDC of cylinder no. 1.
All pistons are in the 90° position.
Check locking of adjustment units.
Observe direction of engine rotation (direction of rotation always clockwise when viewed towards timing drive side).
Necessary preliminary tasks:
- Remove CYLINDER HEAD COVER
- Remove right WHEEL ARCH COVER
Balance hole and special tool bore can be mixed up; all pistons must be in the 90° position.
If necessary, determine by means of spark plug bore.
Rotate crankshaft at central bolt.
Position crankshaft with special tool 11 9 590 .
Turn camshafts at hexagon head in direction of engine rotation.
The adjustment units are locked in the initial position when the camshafts are non-positively connected to the adjustment units.
If no fixed connection to the camshaft can be established, the adjustment unit is faulty and must be replaced.
Both camshafts are in the correct installation position when the designation (IN) for intake camshaft points upwards.
In the case of the exhaust camshaft, the designation EX must point upwards.
Position of exhaust camshaft (A) points at an angle to the right in an upper outward direction
Position of intake camshaft (E) points at an angle to the left in an upper outward direction.
Position special tool 11 9 540 on mounting flats of exhaust camshaft and secure it with a screw (1).
Position special tool 11 9 540 on mounting flats of intake camshaft and secure it with screw (1 and 2).
If necessary, adjust VALVE TIMING .
Assemble engine.