Valve Timing, Checking: 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 .
• 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.

  Courtesy of

• Remove the ignition coils with power output stages cylinder "1". Refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

  Courtesy of

• Removing the spark plug from cylinder 1 with the -3122B-.
• Install the -T10170/A- all the way into the spark plug thread.
• 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 (BDC of the meter) position the piston at »TDC«.

Courtesy of

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.

• Measure the distance from the left outer edge ridge -1- to the marking -2- on the intake camshaft.
  • Specified value: 61 to 64 mm.

  Courtesy of

• Once the specified value is reached, measure the distance between the marking on the exhaust camshaft -3- and the marking on the intake camshaft -4-.

  Courtesy of

  • Specified value: 124 to 126 mm.
  NOTE: If one tooth has an offset, there will be a deviation of approximately 6 mm from the specified value. The timing chain must be installed again if an offset is detected.
  • The notch -1- on the vibration damper must align with the arrow marking -2- on the lower timing chain cover.

  Courtesy of

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