Checking Camshaft Timing

• If applicable, remove the cover (1).

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  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. 

  • 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.

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• Turn the engine with the special tool 0 493 380 (11 6 480)  to the TDC firing position at the first cylinder.
• On vehicles with automatic transmission: 

  Position special tool 2 365 488  and fasten with bolts.

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• On vehicles with manual gearbox: 

  Remove the protective cap (1) from the oil sump and turn the crankshaft with the special tool 0 493 380 (11 6 480)  at the central bolt to the TDC firing position.

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• Use the special tool 2 288 380  to block the crankshaft in the TDC firing position at the first cylinder.

Check 

• Check if the marks (1) for the intake and exhaust camshaft can be read from the top.

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Result 

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

Measure

• Turn the camshafts to the correct position or readjust the timing.

Check 

• Check if the middle one of the three flat areas (1) on both camshafts points towards the top. The special tool 2 358 122  may not  be mounted when the camshafts are twisted by 180 degrees (center flattened area points down).

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Result 

» The middle one of the three flat areas (1) does not point towards the top.

Measure

• Turn the camshafts to the correct position, so that the middle one of the three flat areas (1) on both camshafts points up.

Check 

• Make sure the cam on the exhaust camshaft A at the first cylinder points obliquely inward to the right.

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Result 

» The cam does not point obliquely inward to the right.

Measure

• Turn the camshaft to the correct position.

Check 

• Make sure the cam on the intake camshaft E at the first cylinder points obliquely to the left.

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  Result 

  » The cam does not point obliquely to the left.

  Measure

  • Turn the camshaft to the correct position.
• Mount special tool 2 358 122. 
• Secure the basic carrier (1) with the bolts (2) on the cylinder head.
• Position the gauge (3) with the recess on the mounting flats of the exhaust camshaft.
• Secure the gauge (3) with the bolts (5) on the basic carrier.
• Position the gauge (4) with the recess on the mounting flats of the intake camshaft.
• Secure the gauge (4) with the bolts (5) on the basic carrier.

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