Adjust the timing of the camshaft
WARNING:
High-voltage system
.
The high-voltage system operates on the basis of hazardous, electrical voltage and high currents. Mortal hazard through electric shock!
The high-voltage system operates on the basis of hazardous, electrical voltage and high currents. Mortal hazard through electric shock!
- All work on the high-voltage system may only be carried out by specially trained and technically experienced personnel.
- For additional information see: SAFETY INSTRUCTIONS ON HANDLING HYBRID CARS .
- For additional information see: NOTES ON REPAIR OF HIGH-VOLTAGE BATTERY UNIT .
Preliminary work
- Refer to BLOCKING THE CRANKSHAFT IN HE TDC FIRING POSITION OF CYLINDER 1 .
- Refer to REMOVING COWL LOWER PART .
- Refer to REMOVING THE CENTER STRUT BRACE .
- Refer to REMOVING THE HOLDER OF THE POSITIVE BATTERY CABLE .
- Refer to REMOVING CHAIN TENSIONER .
Prerequisite
Crankshaft is disconnected and blocked.
Engine is in TDC firing position of cylinder 1.
- Get the set of special tools 2 456 372
ready.
Number Description 1 Basic carrier 2 Setting gauge 0.7° for adjusting the intake camshaft 3 Setting gauge 0.5° for adjusting the exhaust camshaft 4 Basic carrier screws on cylinder head 5 Screw gauge on basic carrier - Use the setting gauge 0.7° (1) from the special tool kit 2 456 372 to adjust the intake camshaft.
- Use the setting gauge 0.5° (2) from the special tool kit 2 456 372
to adjust the exhaust camshaft.
- To release the VANOS central valve (1), use the reversible ratchet (2) from the special tool 0 496 855
with the special tool 2 450 487
.
- Position the basic carrier (1) from the set of special tools 2 456 372
on the cylinder head.
- Tighten the screws (1) from special tool set 2 456 372 on the basic carrier (2).
TIGHTENING TORQUE SPECIFICATIONS
| Basic carrier to cylinder head | |
|---|---|
| M6 | Tightening torque 8 Nm |
- Position the setting gauge 0.7° (1) from the special tool kit 2 456 372 between the basic carrier (2) from the set of special tools 2 456 372 and the intake camshaft (3).
- If necessary, crank the engine at the crankshaft using special tool 0 493 380 (11 6 480) .
- Tighten the screws (4) from special tool set 2 456 372 .
TIGHTENING TORQUE SPECIFICATIONS
| Test gauge to basic carrier | |
|---|---|
| M6 | Tightening torque 8 Nm |
- Release the VANOS central valve (5) of the intake adjuster.
- Position the setting gauge 0.5° (1) from the special tool kit 2 456 372 between the basic carrier (2) from the set of special tools 2 456 372 and the exhaust camshaft (3).
- If necessary, crank the engine at the crankshaft using special tool 0 493 380 (11 6 480) .
- Tighten the screws (4) from special tool set 2 456 372 .
TIGHTENING TORQUE SPECIFICATIONS
| Test gauge to basic carrier | |
|---|---|
| M6 | Tightening torque 8 Nm |
- Release the VANOS central valve (5) of the exhaust camshaft adjuster.
- Make sure the flattened areas (1) on the intake camshaft and the exhaust camshaft are pointing upwards at an angle.
- Rotate the intake camshaft (E) and the exhaust camshaft (A) so that the marks (1) are legible from above.
- Make sure the cam (1) on the exhaust camshaft on cylinder 1
is pointing slightly to the inside right at an angle.
- Make sure the cam (1) on the intake camshaft on cylinder 1 is pointing leftwards at an angle.