Blocking the camshafts

Check 

• Check whether the marks (1)  on the intake and exhaust camshafts can be read from above.

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  Result 

  » Marks (1) 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 when the camshafts are twisted by 180° (central flattened area points downwards).

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  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.
• The cam on the exhaust camshaft on the first cylinder points obliquely inwards to the right.

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• The cam on the intake camshaft on the first cylinder points obliquely to the left.

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• Keep the set of special tools 2 358 122 ready:

  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

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• 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 be readjusted.

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