Special tools
- Camshaft locking pin – No.111589031500.
- Flywheel/drive plate locking tool (starter motor aperture) – No.602589004000.
- Holding tool – No.611589014000.
- Timing chain link kit – No.602589024000.
- Timing chain link separator (item 1) – No.602589023300.
- Timing chain link separator (item 2) – No.602589046300.
- Timing chain link separator (item 3) – No.602589046301.
- Timing chain link installer – No.602589003900.
- Timing chain link installer die kit 1 – No.602589026300.
- Timing chain link installer die kit 2 – No.602589036300.
- Timing chain link installer die kit 3 – No.112589096300.
- Tool case – No.602589009800.
General precautions
- Disconnect battery earth lead.
- Remove fuel injectors 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.
- Do NOT turn crankshaft or camshaft with locking pin installed.
Valve timing procedures
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 TDC on No.1 cylinder [1] .
- Insert locking pin into inlet camshaft sprocket [2] .
- Ensure timing marks on each camshaft aligned [3] & [4] .
- Remove tensioner assembly before carrying out engine repairs [5] .
NOTE: Bolts for camshaft sprocket MUST be renewed [6] .
- Install tensioner after engine repairs [5] . Tightening torque: 80 Nm.
- Tighten crankshaft pulley bolt [7] .
- C-Class (203) – engine code 649.962:
- Engine No. →30528520: 325 Nm + 90°
- Engine No. 30528521→: 200 Nm + 90° + 90°
- C-Class (203) – engine code 649.963:
- Engine No. →30562318: 325 Nm + 90°
- Engine No. 30562319→: 200 Nm + 90° + 90°
- C-Class (204): 200 Nm + 90° + 90°
- CLK (209) – engine code 649.966:
- Engine No. →30562318: 325 Nm + 90°
- Engine No. 30562319→: 200 Nm + 90° + 90°
- Viano/Vito (639): 325 Nm + 90°