Blocking the camshafts

Check 

• Check whether the mark (1) of the exhaust camshaft and the mark (2) of the intake camshaft can be read from above.

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Result 

» Marks (1) and (2) cannot be read from the top.

Measure

• Turn the camshafts to the correct position or re-adjust 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).

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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 so 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 the cylinder as shown.

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• The special tool 2 358 122  consists of multiple parts.

  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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• Fix basic carrier (1) of the special tool 2 358 122  with the bolts (2) to 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).

Courtesy of BMW OF NORTH AMERICA, INC.