TorqFix

Gearbox removal & installation: Citroen XM motor en bak (ZPJ4)

Step-by-step gearbox removal & installation for the Citroen XM motor en bak (ZPJ4): 46 steps. What to remove, in what order, and what to check after.

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

46 steps 2 engine codes

🧭 Before you start

Fits: platform codes 3.0I, V6, 24V

  • Opens: coolant

Don't miss

  • Remove the air-conditioning compressor but do not disconnect

🔧 Engine codes this applies to

ZPJ4(SFZ)ZPJ4(UKZ)

📋 Procedure

  1. Installation is in the reverse order of removal
  2. Drain the cooling system
  3. Remove the air filter
  4. Remove the cover
  5. Remove the throttle body
ZPJ4(SFZ)? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Disconnect the accelerator cable
  2. Disconnect the hose
  3. Remove the cover
  4. Disconnect the pressure sensor
  5. Remove the injector harness
  6. Disconnect the fuel feed and return lines
  7. Disconnect the air temperature sensor
  8. Disconnect the hose
  9. Remove the air inlet hose
  10. Disconnect the bonnet lock cable
  11. Remove the bolts
  12. Remove the water separator
  13. Disconnect the earth connections
  14. Remove the bolts
  15. Remove the battery box
  16. Disconnect the engine control unit
  17. Remove as shown
  18. Disconnect the hoses
  19. Disconnect the electrical wiring
  20. Check the condition of the tensioner and idler pulley(s)
  21. Disconnect the oxygen sensor
  22. Vehicles with automatic transmission
  23. Disconnect the gear-shift control
  24. Remove the clutch slave cylinder
  25. Remove the hydraulic system reservoir
  26. Remove the radiator
  27. Use a hoist to support the engine
  28. Disconnect the remaining wiring, lines and hoses between the engine/gearbox and the bodywork
  29. Remove the air-conditioning compressor but do not disconnect
  30. Disconnect the exhaust pipe from the manifold
  31. Remove the drive shafts
  32. Disconnect the engine supports
  33. Disconnect the gearbox support
  34. Remove the engine/gearbox

Other CITROEN procedures

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

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Workshop data on this page last updated 20 Sep 2026.