Adjust the timing of the camshaft

Preliminary work 

• Refer to BLOCK THE CRANKSHAFT IN HE TDC FIRING POSITION OF CYLINDER 1
• Refer to REMOVE THE HOLDER OF THE POSITIVE BATTERY CABLE
• Refer to REMOVE THE HEAT SHIELD AT THE CYLINDER HEAD
• Refer to REMOVING CHAIN TENSIONER .

Prerequisite

Crankshaft is disconnected and blocked. Engine in TDC firing position at 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

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• 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.

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• 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.

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• Position the basic carrier (1) from the set of special tools 2 456 372 on the cylinder head.

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• Tighten the screws (1) from special tool set 2 456 372 on the basic carrier (2).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Basic carrier to cylinder head
  M6	Tightening torque	8 Nm

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• 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 TORQUES SPECIFICATION
  
  

  Test gauge to basic carrier
  M6	Tightening torque	8 Nm

• Release the VANOS central valve (5) of the intake adjuster.

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• 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

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  TIGHTENING TORQUES SPECIFICATION
  
  

  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.

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• Turn the intake camshaft (E) and exhaust camshaft (A) to the correct position, so that the marks (1) can be read from above.

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• Make sure the cam (1) or tie exhaust camshaft on cylinder 1 is pointing slightly to the inside right at an angle.

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• Make sure the cam (1) on die intake camshaft on cylinder 1 is pointing leftwards at an angle.

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