Timing chain replacement: Mercedes-Benz W169, 245 2.0 (266.980)

🧭 Before you start

Fits: platform codes 200, TURBO

• Opens: coolant
• Timing position: the crankshaft or camshaft is set and locked during this job

🔧 Engine codes this applies to

📋 Procedure

Preparation and removal

1. Before disconnecting the battery cable, check the audio system security code
2. Always use new gaskets
3. Timing chain assembly tools:
4. Timing chain separating tools:
5. Drain the coolant

6. Remove the steering rack heat shield
7. Note: Avoid bending, torsion or traction
8. Remove the camshaft housing cover
9. Turn the crankshaft to TDC for cylinder 1
10. Check the timing marks
11. Remove the chain tensioner
12. Remove the camshaft gearwheel
13. Loosen the camshaft bearing caps
14. From inside to outside
15. Remove the camshaft bearing caps
16. Remove the camshaft
17. Remove the air inlet duct
18. Disconnect the throttle body heater hose
19. Disconnect the throttle body electrical connections
20. Remove the throttle body
21. Camshaft housing
22. Remove the camshaft housing
23. Disconnect the spark plug cables
24. Remove the spark plugs
25. Disconnect the oil feed line from the turbocharger
26. Note: Move it aside
27. Separate the timing chain
28. Use the special tools to remove the timing chain pins

Installation and checks

29. Connect the ends of the new chain
30. Fit the chain tensioner
31. Refit all parts in the reverse order of removal
32. Camshaft bearing cap
33. Refit the camshaft bearing bridge
34. Refit the camshaft
35. Refit the camshaft bearing caps
36. Tighten the bolts by hand
37. Fit the timing chain onto the camshaft gearwheel
38. Refit the camshaft gearwheel
39. Tighten the bolts by hand
40. Remove the special tools
41. Pull the removed timing chain pins out of the chain separating tool

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