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How to Replace timing chain on Mercedes C350 CGI W204 2008-2011

Special tools

  • Crankshaft turning tool – No.001589650900.
  • Flywheel/drive plate locking tool (bell housing) – No.112589034000.
  • Timing chain link installer – No.272589003900.
  • Timing chain link installer die kit 1 – No.272589006300.
  • Timing chain link installer die kit 2 – No.272589016300.
  • Timing chain link installer die kit 3 – No.271589016300.
  • Timing chain link kit – No.272589036300.
  • Timing chain link separator (item 1) – No.602589023300.
  • Timing chain link separator (item 2) – No.602589056300.
  • Timing chain link separator (item 3) – No.602589056301.
  • Tool case – No.602589009800.

General precautions

  • Disconnect battery earth lead.
  • Remove spark plugs to ease turning engine.
  • Turn engine in normal direction of rotation (unless otherwise stated).
  • Observe tightening torques.
  • Do NOT turn crankshaft via camshaft or other sprockets.
  • Do NOT turn crankshaft or camshaft with timing chain removed.

Valve timing procedures

How to Replace timing chain on Mercedes C350 CGI W204 2008-2011
How to Replace timing chain on Mercedes C350 CGI W204 2008-2011

NOTE: Timing chain can be changed without dismantling engine. Using the tools listed above, the new chain can be linked to the old, passed round the sprockets and then joined.

  • Engine at 55° BTDC on No.1 cylinder.

NOTE: Use 305° mark on crankshaft pulley [1] .

  • Remove camshaft position (CMP) sensors [2] .
  • Ensure timing marks on camshaft sprockets aligned [3] .

NOTE: Mark on each camshaft sprocket MUST align with centre of each camshaft position (CMP) sensor hole [3] & [4] .

  • Turn crankshaft clockwise until crankshaft keyway at 12 o’clock position [5] .
  • Ensure balancer shaft counterweight aligned with timing mark on crankcase [6] .
  • With cylinder head front covers removed:
      • Turn crankshaft clockwise to 40° ATDC on No.1 cylinder [7] .
      • Ensure camshaft sprocket timing marks at 12 o’clock position [8.]
      • Ensure timing mark on camshaft sprockets aligned with edge of cylinder head [9] .
  • Fit new timing chain tensioner. Tightening torque: 70 Nm.

NOTE: Crankshaft pulley bolt MUST be renewed.

  • Tighten crankshaft pulley bolt to 200 Nm + 90° [10] .

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