Valve Timing, Checking

Special tools and workshop equipment required 

• Spark Plug Removal Tool:3122B 
  Fig 1: Identifying Spark Plug Removal Tool 3122B

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• Dial Indicator Set:VAS6341 
  Fig 2: Identifying Dial Gauge Set VAS 6341

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• Dial Gauge Adapter:T10170A 
  Fig 3: Dial Gauge Adapter T10170A

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• Wrench - 21mm:T40263 
  Fig 4: Identifying Wrench - 21mm

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• Adapter:T40314 
  Fig 5: Adapter T40314

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Procedure 

-- Remove the upper timing chain cover. Refer to UPPER TIMING CHAIN COVER, REMOVING AND INSTALLING .

-- Remove the cylinder ignition coil "1". Refer to IGNITION COILS, REMOVING AND INSTALLING .

-- Turn the vibration damper crankshaft in direction of engine rotation -arrow- using the Wrench - 21mm:T40263  -6-, Adapter:T40314  -1- and the 24mm socket, until the markings -3 and 4- almost face each other.

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-- Removing the spark plug from cylinder 1 with the Spark Plug Removal Tool:3122B  .

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-- Install the Dial Gauge Adapter:T10170A  all the way into the spark plug thread.

-- Insert the Dial Gauge Set:VAS6341  with the Dial Gauge Adapter Extending Piece:T10170A/1  all the way and secure it with the locking nut -arrow-.

-- Then, turn the crankshaft slowly in the direction of the engine rotation -arrow- until the maximum dial reading is reached. When the maximum dial reading is reached (turning point of the meter) position the piston at >>TDC<<.

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• The mark -3- from the camshaft chain sprockets -2 and 5- and the mark -4- on the cylinder head cover must align.

TIP:

If the crankshaft was turned past "TDC", turn the crankshaft two more turns in the direction of engine rotation. Do not turn the engine in the opposite direction of the engine rotation.

• If there is an offset of a tooth, the timing chain must be refitted.