EGR valve removal: Citroen C6 (DT20C)

🧭 Before you start

Fits: platform codes 3.0, V6, HDI, FAP, 240

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

Don't miss

• Loosen the camshaft gearwheel bolts slightly but ensure the gearwheel can rotate freely

🔧 Engine codes this applies to

📐 15 workshop diagrams for DT20C(X8Z)

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

📋 Procedure

Preparation and removal

1. Clamp:
2. Check the camshaft oil seal for leaks
3. Remove the engine upper cover
4. Raise the front of the vehicle
5. Remove the engine lower cover

6. Remove the front right wheel
7. Camshaft gearwheel
8. Drain the cooling system
9. Remove the mixing chamber housing with EGR valve
10. Remove the EGR pipe
11. Remove the coolant pipe
12. Remove the intercooler air duct
13. Remove the nut
14. Remove the ancillary drive belt
15. Fit a lifting eye to the engine
16. Use a hoist to support the engine
17. Remove the timing belt upper covers
18. Remove the engine support
19. Align the camshaft gearwheel marks as shown
20. Remove the catalytic converter together with the diesel particulate filter
21. Remove the flywheel inspection cover plate
22. Lock the crankshaft by fitting a locking pin into the flywheel
23. Loosen the camshaft gearwheel bolts slightly but ensure the gearwheel can rotate freely
24. Remove the coolant pump pulley
25. Remove the crankshaft pulley
26. Loosen the tensioner pulley bolt

Installation and checks

27. Crankshaft pulley
28. Use an Allen key
29. Turn the tensioner anti-clockwise to tension the timing belt
30. Align the marks on the tensioner and backplate
31. Tighten the tensioner pulley bolt
32. Remove all the locking tools
33. Check for correct fitting
34. Refit the crankshaft pulley
35. Refit the engine support
36. Refit the timing belt upper cover
37. Remove the lifting eye
38. Refit the ancillary drive belt
39. Refit the nut
40. Refit the intercooler air duct
41. Refit the coolant pipe
42. Refit the EGR pipe
43. Reconnect the coolant temperature sensor
44. Refit the mixing chamber housing with EGR valve
45. Refit the air inlet duct
46. Refit the fuel line bracket
47. Reconnect the fuel lines
48. Reconnect the electrical connector(s)
49. Refit the EGR pipe
50. Refill the cooling system
51. Refit the right wheel arch liner
52. Refit the front right wheel
53. Refit the engine lower cover
54. Lower the vehicle
55. Refit the engine upper cover
56. Reconnect the battery
57. Refit the LDS fluid reservoir cap

Other CITROEN procedures

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• 407 - DT20C
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