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 Gauge Adapter: T10170A 
• Wrench - 21mm: T40263 
  Fig 2: Identifying Wrench - 21mm

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• Adapter: T40314 
  Fig 3: Adapter T40314

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• Dial Gauge Set: VAS6341 
  Fig 4: Identifying Dial Gauge Set VAS 6341

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Procedure 

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

-- Remove the front noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .

-- If installed, remove bolt -arrow- to do so loosen the bumper cover end plate on the lock carrier. Refer to OVERVIEW - BUMPER COVER .

Fig 5: Coolant Pipes on Lock Carrier

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-- Push the coolant pipes to the side.

-- Turn the crankshaft with the : T40263  , : T40314  and 24 mm socket on the vibration damper in the direction of engine rotation until the marks -arrows- are almost on top.

Fig 6: Identifying Mark Points On Intake And Exhaust Camshafts

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-- Removing the spark plug from cylinder 1 with the : 3122B  .

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

Fig 7: Identifying Adapter For Dial Gauge

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-- Insert the : VAS6341  with the : T10170A/1  all the way and secure it with the locking nut -arrow-.

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

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.
• The combination of the following shown : T40263  , : T40314  and 24 mm socket are better suited than the : T10355  for positioning the vibration damper.

With Marks in the Cylinder Head Cover 

Fig 8: Identifying Vibration Damper With Counterhold - Vibration Damper T10355

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• The markings -1- on the camshaft chain sprockets must be opposite the markings -2 and 3- on the cylinder head.

Without Marks in the Cylinder Head Cover 

Fig 9: Identifying Counterhold Tool And Markings

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• The notch on the vibration damper and the marking on the lower cover for timing chain must be opposite one another -arrow-.
• The markings -1- on the camshaft chain sprockets must point upward.

-- Measure the distance from the edge -1- to the marking -2- on the exhaust camshaft chain sprocket.

Fig 10: Exhaust Camshaft Chain Sprocket Distance Markings

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• Specified value: 74 to 77 mm.

-- Once the specified value is reached, measure the distance between the mark on the exhaust camshaft chain sprocket -3- and the mark on the intake camshaft chain sprocket -4-.

Fig 11: Exhaust Camshaft Chain Sprocket Measuring Distance

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• Specified value: 124 to 127 mm.

Tightening Specifications 

• Refer to OVERVIEW - NOISE INSULATION .
• Refer to OVERVIEW - COOLANT PIPES .