TorqFix

407 DT20C — PEUGEOT

407 DT20C on Peugeot: 100 steps, engines DT20C(X8Z). What to remove, in what order, and what to check after.

Workshop procedure for PEUGEOT — the exact step sequence and torque figures, straight from real workshop data.

100 steps 1 engine code

🧭 Before you start

Fits: platform codes 3.0, HDIF, V6

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

Don't miss

  • Never turn the engine in the direction opposite to that of normal operation

🔧 Engine codes this applies to

📋 Procedure

Preparation and removal

  1. Lifting eye:
  2. Camshaft locking pins:
  3. Check the condition of the coolant pump
  4. Never turn the engine in the direction opposite to that of normal operation
  5. Mixing chamber housing
DT20C(X8Z)? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Remove the right wheel arch liner
  2. Note: Avoid bending, torsion or traction
  3. Crankshaft pulley
  4. Remove the EGR pipe
  5. Use an Allen key
  6. Disconnect the fuel lines
  7. Remove the EGR pipe
  8. Remove the coolant pipe
  9. Remove the intercooler air duct
  10. Remove the nut
  11. Remove the ancillary drive belt
  12. Fit a lifting eye to the engine
  13. Use a hoist to support the engine
  14. Remove the timing belt upper covers
  15. Remove the engine support
  16. Align the camshaft gearwheel marks as shown
  17. Remove the catalytic converter together with the diesel particulate filter
  18. Remove the flywheel inspection cover plate
  19. Lock the crankshaft by fitting a locking pin into the flywheel
  20. Fit the camshaft locking pins
  21. Remove the crankshaft pulley
  22. Remove the timing belt lower cover
  23. Remove the timing belt

Installation and checks

  1. Fit the timing belt in the sequence shown
  2. Tighten the tensioner pulley bolt
  3. Refit the air inlet duct
  4. Remove all the locking tools
  5. Turn the engine 8 revolutions by hand
  6. Refit the flywheel cover plate
  7. Refit the timing belt lower cover
  8. Refit the engine support
  9. Remove the lifting eye
  10. Refit the ancillary drive belt
  11. Refit the nut
  12. Refit the intercooler air duct
  13. Refit the coolant pipe
  14. Refit the EGR pipe
  15. Reconnect the coolant temperature sensor
  16. Refit the mixing chamber housing with EGR valve
  17. Refit the air inlet duct
  18. Refit the fuel line bracket
  19. Reconnect the fuel lines
  20. Reconnect the electrical connector(s)
  21. Refit the EGR pipe
  22. Refill the cooling system
  23. Refit the LDS fluid reservoir cap
  24. Refit the right wheel arch liner
  25. Refit the front right wheel
  26. Refit the engine lower cover
  27. Lower the vehicle
  28. Refit the engine upper cover
  29. Reconnect the battery

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

The story behind TorqFix →

Workshop data on this page last updated 20 Sep 2026.