OM642 in W906 — MERCEDES-BENZ

🧭 Before you start

Fits: platform codes 218, CDI, |, 219, 318, -4MATIC, 319, 418, 419

• Opens: fuel
• Timing position: the crankshaft or camshaft is set and locked during this job
• Special tools named: locking tool
• Renewed: timing chain

Don't miss

• Always renew the timing chain
• If the timing chain is to be re-used, mark the running direction before removal
• Use the special tool to counterhold
• Do not drop any timing chain pins into the crankcase

🔧 Engine codes this applies to

📋 Procedure

Preparation and removal

1. Before disconnecting the battery cable, check the audio system security code
2. Always renew the timing chain
3. If the timing chain is to be re-used, mark the running direction before removal
4. If applicable:
5. Note: Avoid bending, torsion or traction

6. All vehicles:
7. Detach the cooling system hoses
8. Disconnect the radiator fan wiring
9. Camshaft gearwheel locking tool:
10. Timing chain separating tools:
11. Timing chain assembly links:
12. Timing chain assembly tools:
13. Use the special tool to counterhold
14. Timing chain separating tools:
15. Right-hand bank:
16. Remove the glow plug control unit
17. Note: Do not disconnect
18. Disconnect the fuel lines from the fuel rail
19. Disconnect the fuel rail pressure sensor
20. Remove the high-pressure line(s)
21. Remove the fuel rail
22. Plug the holes
23. Remove the oil separator
24. Disconnect the fuel lines from the injectors
25. Disconnect the fuel injector wiring
26. Remove the fuel injector clamps
27. Remove the injectors
28. Store in order
29. Disconnect the camshaft position sensor electrical connector
30. Remove the vacuum pump
31. Remove the hose
32. Unbolt the dipstick tube bracket
33. Remove the wiring
34. Connect the old chain to the new one
35. Type 1:
36. Turn the engine until the chain connecting link shows
37. Disconnect the chain
38. Remove the assembly link
39. Remove the camshaft gearwheel locking tool
40. Fit the camshaft locking tool
41. Fit the camshaft gearwheel locking tool
42. Separate the timing chain
43. Connect the ends of the new chain
44. Fit the timing chain holding tool
45. Tighten the special tool
46. Use the special tools to remove the timing chain pins
47. Note: Do not drop any timing chain pins into the crankcase
48. Cylinder head cover
49. Stage 1:

Installation and checks

50. Stage 3:
51. Fuel rail:
52. Union nut:
53. Refit the cylinder head cover
54. Refit the bolts
55. Injector
56. Stage 1:
57. Stage 3:
58. Refit the oil separator
59. Type 1:
60. Type 2:
61. Viscous fan:
62. Refit the dipstick tube
63. Refit the hose
64. Refit the vacuum pump
65. Reconnect the camshaft position sensor electrical connector
66. Refit the injectors
67. Refit the fuel injector clamps
68. Stage 1:
69. Reconnect the fuel injector wiring
70. Reconnect the fuel lines to the injectors
71. Stage 1:
72. Stage 2:
73. Refit the oil separator
74. Refit the fuel rail
75. Refit the high-pressure line(s)
76. Reconnect the fuel rail pressure sensor
77. Reconnect the fuel lines to the fuel rail
78. Stage 1:
79. Refit the glow plug control unit
80. Viscous fan:
81. Refit the viscous coupling
82. Use the special tool to counterhold
83. Refit the radiator cover
84. Reconnect the radiator fan wiring
85. Attach the cooling system hoses
86. If applicable:
87. Refit the glow plug control unit
88. General:
89. Reconnect the battery earth cable
90. Check for any fault codes
91. Run the engine
92. Check for leaks

Other MERCEDES-BENZ procedures

• W906 - OM642 (642.896)/992 engine - ancillary drive belt
• W906 Sprinter II multifuntion steering wheel
• MB eng. 111- chain
• MB eng. M111 (111.951)- chain
• MB eng. M111 (111.955)/958/983- chain
• MB eng. 111 Kompressor- chain
• MB eng. M111 (111.979)- chain
• OM642 in W164, X164
• OM642 in W251
• OM642 in W463