Timing chain replacement: Ford Fiesta 2.0 Duratec-HE (N4JA, N4JB)

🧭 Before you start

Fits: platform codes ST150, DURATEC

• Opens: power steering fluid
• Timing position: the crankshaft or camshaft is set and locked during this job
• Special tools named: locking pin

Don't miss

• If the timing chain is to be re-used, mark the running direction before removal
• Never turn the engine in the direction opposite to that of normal operation
• Use the special tool to counterhold
• Use a wrench to counterhold
• Repeat the procedure if the special tools do not fit properly

🔧 Engine codes this applies to

📐 36 workshop diagrams for N4JA

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

Preparation and removal

1. Never turn the engine in the direction opposite to that of normal operation
2. Disconnect the battery
3. Disconnect the positive crankcase ventilation hose
4. If the timing chain is to be re-used, mark the running direction before removal
5. Note: Avoid bending, torsion or traction

6. Chain tensioner
7. Disconnect the camshaft position sensor(s)
8. Clean off the old sealant
9. Bolts:
10. Engine support:
11. Remove the cylinder head cover
12. Bolts:
13. Remove the crankshaft pulley
14. Use the special tool to counterhold
15. Remove the crankshaft front radial seal
16. Use the special tool
17. Remove the washer
18. Remove the drive shaft boot
19. Pull the bumper slightly forwards
20. Remove the headlight(s)
21. Disconnect the power steering line from the inlet manifold
22. Drain the power steering fluid
23. Remove the power steering fluid reservoir
24. Note: Put a wooden block between the sump and the jack
25. Remove the coolant pump pulley
26. Remove the idler pulley
27. Remove the timing cover upper bolts
28. Remove the blanking plug
29. Fit the crankshaft TDC locking pin
30. Turn the crankshaft until it touches the TDC locking pin
31. Lock the tensioner; use a locking pin
32. Remove the crankshaft pulley centre bolt
33. Note: Use a wrench to counterhold
34. Tighten the bolt slightly
35. Remove the chain tensioner
36. Turn the crankshaft clockwise by 1 3/4 turns to 45° before TDC for cylinder 1
37. Fit the crankshaft TDC locking pin
38. Turn the crankshaft to TDC for cylinder 1

Installation and checks

39. Refit the chain guide(s)
40. Use new nut(s)
41. In the order shown
42. Refit the power steering reservoir
43. Renew the O-rings
44. Refill the power steering system
45. Refit the engine support
46. Use the special tool
47. Use new nuts
48. Refit the coolant reservoir
49. Reconnect the crankshaft position sensor
50. Refit the crankshaft front radial seal
51. Use the special tools to refit the crankshaft pulley
52. Tighten the crankshaft pulley centre bolt
53. Remove the bolt
54. Remove the special tool
55. Remove the crankshaft TDC positioning tool
56. Check the position of the crankshaft pulley
57. Note: Fit the bolt(s) finger-tight only
58. Refit the special tool
59. Note: Repeat the procedure if the special tools do not fit properly
60. Remove the special tool
61. Remove the bolt
62. Remove the crankshaft TDC positioning tool
63. Refit the blanking plug
64. Fit the drive shaft boot
65. Renew the clamp
66. Align the crankshaft position sensor
67. Loosen the crankshaft position sensor bolts
68. Fit the special tool
69. Tighten the crankshaft position sensor bolts
70. Remove the special tool
71. Fit the ancillary drive belt
72. Apply sealant as indicated
73. Refit the cylinder head cover
74. If necessary
75. Renew the cylinder head gasket
76. Tighten the bolts
77. In the order shown
78. Refit the spark plugs
79. Use the special tool
80. Refit the evaporative control valve bracket
81. Reconnect the camshaft position sensor(s)
82. Reconnect the positive crankcase breather hoses to the valve cover
83. Refit the air filter retainers
84. Reconnect the return hose to the power steering reservoir
85. Reconnect the engine wiring to the top of the engine
86. Refit the positive crankcase breather
87. Refit the air filter housing and hoses
88. Reconnect the battery

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