Checking camshaft timing (AT)
WARNING:
Hot surfaces
.
Risk of burning!
Risk of burning!
- Perform all work only on components that have cooled down.
Preliminary work
- Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
- Refer to REMOVING THE ACOUSTIC COVER .
- Refer to REMOVING THE INTAKE FILTER HOUSING .
- Refer to REMOVING CLEAN AIR PIPE .
- Refer to REMOVING FAN COWL .
- Refer to REMOVING THE LEFT COVER IN THE ENGINE COMPARTMENT .
- Refer to REMOVING THE RIGHT COVER IN THE ENGINE COMPARTMENT .
- Refer to REMOVING THE SOUND INSULATION ON THE ON THE CENTER OF THE FIREWALL UPPER PART .
- Refer to REMOVING BOTH WIPER ARMS .
- Refer to REMOVING COWL PANEL COVER .
- Refer to REMOVING THE TENSION STRUT ON THE STRUT TOWER .
- Refer to REMOVING ACOUSTIC COVER AT REAR .
- Refer to REMOVING IGNITION COILS .
- Refer to REMOVING THE HIGH PRESSURE LINE BETWEEN THE RAIL AND THE HIGH PRESSURE PUMP .
- Refer to REMOVING FUEL DELIVERY LINE .
- Refer to REMOVING THE INJECTORS FOR CYLINDERS 1 TO 3 .
- Refer to REMOVING THE INJECTORS FOR CYLINDERS 4 TO 6 .
- Refer to REMOVING HIGH PRESSURE PUMP .
- Refer to REMOVING BOTH ACTUATORS .
- Refer to REMOVING FRONT ENGINE ENCAPSULATION .
- Refer to REMOVING THE CYLINDER HEAD COVER .
- Refer to REMOVING ALL SPARK PLUGS .
- Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
- Refer to REMOVING THE SUPPORT FOR THE UNDERBODY PROTECTION .
- Refer to REMOVING STARTER MOTOR .
NOTE:
RISK OF DAMAGE
Damage to the engine .
If the engine is manually rotated in the wrong direction of rotation, the engine can be damaged .
Damage to the engine .
If the engine is manually rotated in the wrong direction of rotation, the engine can be damaged .
- Only rotate the engine manually in the correct direction of rotation: a) clockwise when looking at the damper, or b) counterclockwise when looking at the chain drive. b) applies only if the timing chain is installed in the rear.
- With the special tool, turn the engine 0 493 380 (11 6 480) to the TDC firing position of cylinder 1 .
Blocking the crankshaft in the TDC firing position of the first cylinder (automatic transmission)
- Version with automatic transmission:
Position the special tool 2 365 488 and secure with the corresponding screws.
Block the crankshaft with the special tool 2 288 380 in the TDC firing position of the first cylinder .
Check
- Check whether the mark (1) of the exhaust camshaft and the mark (2) of the intake camshaft can be read from above.
Result
» Marks (1) and (2) cannot be read from the top.
Measure
- Turn the camshafts to the correct position or readjust the valve timing.
Check
- Check whether the center of the three flattened areas (1) on both camshafts points upwards. The special tool 2 358 122 can also be mounted if the camshafts are twisted by 180° (central flattened area points downwards).
Result
» The center of the three flattened areas (1) does not point upwards.
Measure
- Turn the camshafts to the correct position such that the center of the three flattened areas (1) on both camshafts points upwards.
- Check whether the cam of the exhaust camshaft (1) and the intake camshaft (2) are positioned on cylinder 1 as shown.
- Keep set of special tools 2 358 122
at hand:
Number Description 1 Basic carrier 2 Basic carrier screws on cylinder head 3 Gauge to fix exhaust camshaft 4 Gauge to fix intake camshaft 5 Screw gauge on basic carrier - Secure the basic carrier (1) of the special tool 2 358 122 with the screws (2) the cylinder head .
- Position gauge (3) with the recess on the exhaust camshaft and fix with the screws (5) on the basic carrier (1).
- Position gauge (4) with the recess on the intake camshaft and fix with the screws (5) on the basic carrier (1).
NOTE:
If the special tool 2 358 122
cannot be mounted, the valve timing must readjusted.
Follow-up work
- Refer to INSTALLING ALL SPARK PLUGS .
- Refer to INSTALLING CYLINDER HEAD COVER .
- Refer to INSTALLING FRONT ENGINE ENCAPSULATION .
- Refer to INSTALLING BOTH ACTUATORS .
- Refer to INSTALLING HIGH PRESSURE PUMP .
- Refer to PREPARING THE INJECTORS FOR INSTALLATION .
- Refer to INSTALLING THE INJECTORS FOR THE CYLINDERS 1 TO 3 .
- Refer to INSTALLING THE INJECTORS FOR THE CYLINDERS 4 TO 6 .
- Refer to INSTALLING FUEL DELIVERY LINE .
- Refer to INSTALLING THE HIGH-PRESSURE LINE BETWEEN THE HIGH-PRESSURE RAIL AND THE HIGH-PRESSURE PUMP .
- Refer to INSTALLING THE IGNITION COILS .
- Refer to INSTALLING ACOUSTIC COVER AT REAR .
- Refer to INSTALLING THE TENSION STRUT ON THE STRUT TOWER .
- Refer to ATTACHING COWL PANEL COVER .
- Refer to INSTALLING BOTH WIPER ARMS .
- Refer to CHECKING THE ANGLE OF ATTACK OF THE WIPER ARMS ON THE LEFT AND RIGHT .
- Refer to INSTALLING SOUND INSULATION AT THE CENTER OF THE FIREWALL UPPER PART .
- Refer to INSTALLING THE COVER IN THE ENGINE COMPARTMENT ON THE LEFT .
- Refer to INSTALLING THE COVER IN THE ENGINE COMPARTMENT ON THE RIGHT .
- Refer to INSTALLING FAN COWL .
- Refer to INSTALLING CLEAN AIR PIPE .
- Refer to INSTALLING INTAKE SILENCER HOUSING .
- Refer to INSTALLING ACOUSTIC COVER .
- Refer to INSTALLING STARTER MOTOR .
- Refer to INSTALLING THE SUPPORT FOR THE UNDERBODY PROTECTION .
- Refer to INSTALLING THE FRONT UNDERBODY PROTECTION .
- Refer to CONNECTING ALL BATTERY GROUND LEADS .