TorqFix

Timing chain replacement: Toyota Avensis T25 (2AD-FHV, 2AD-FTV)

Step-by-step timing chain replacement for the Toyota Avensis T25 (2AD-FHV/2AD-FTV): 140 steps. What to remove, in what order, and what to check after.

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

140 steps 2 engine codes

🧭 Before you start

Fits: platform codes 2.2, D-4D, |, D-CAT

  • Opens: engine oil
  • Timing position: the crankshaft or camshaft is set and locked during this job
  • Special tools named: locking pin, dial gauge
  • Renewed: if necessary align

Don't miss

  • Always renew the timing chain
  • Never turn the engine in the direction opposite to that of normal operation
  • Use a wrench to counterhold the camshafts

🔧 Engine codes this applies to

2AD-FHV2AD-FTV

📋 Procedure

Preparation and removal

  1. Unless otherwise advised by the manufacturer, the following procedures are recommended:
  2. Always renew the timing chain
  3. Remove the cylinder head cover
  4. Never turn the engine in the direction opposite to that of normal operation
  5. Note: Avoid bending, torsion or traction
2AD-FHV? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Remove the lower oil sump
  2. Use a special tool to cut the sealant
  3. After applying liquid sealant:
  4. Wait 4 hours before starting the engine
  5. Oil filter:
  6. Remove the plug
  7. Drain the engine oil
  8. Note: Use a drain tube
  9. Remove the oil filter cover
  10. Special tool:
  11. Adaptor:
  12. Remove the oil filter with bracket
  13. Remove the oil strainer
  14. Remove the crankshaft pulley centre bolt
  15. Counterhold tool:
  16. Remove the crankshaft pulley
  17. Use the special tools
  18. Remove the coolant pump
  19. Remove the plug in the timing chain cover
  20. Remove the timing chain cover
  21. Remove the gasket
  22. Remove the O-ring(s)
  23. Remove and discard the crankshaft oil seal
  24. Chain tensioner locking pin:
  25. Oil seal fitting tool:
  26. Use a dial gauge
  27. Renew if necessary
  28. Align and lock the rear balance shaft
  29. Loosen the bolts
  30. In the order shown
  31. Chain tensioner:
  32. Align the holes on the locking arm and automatic tensioner
  33. Apply pressure to the tensioner
  34. Lock the chain tensioner with a locking pin
  35. Remove the chain tensioner
  36. Align the coloured chain link with the marks on the gearwheels
  37. Remove the camshaft gearwheel
  38. Note: Use a wrench to counterhold the camshafts
  39. Remove the crankshaft gearwheel
  40. Remove the timing chain
  41. Note: Use a wrench to counterhold the camshafts

Installation and checks

  1. Refit the chain guide rail
  2. Refit the chain tensioner rail(s)
  3. Chain tensioner:
  4. Align the holes on the locking arm and automatic tensioner
  5. Apply pressure to the tensioner
  6. Lock the chain tensioner with a locking pin
  7. Refit the chain tensioner
  8. Remove the locking pin
  9. Balance shaft drive assembly:
  10. Align and lock the rear balance shaft
  11. Tighten the bolts
  12. In the order shown
  13. Stage 1:
  14. Stage 2:
  15. Tighten the bolts
  16. Renew the crankshaft oil seal
  17. Use the special tool
  18. Oil strainer:
  19. Renew the O-ring
  20. Apply liquid sealing compound
  21. Wait for 3 minutes
  22. Refit the timing chain cover
  23. Refit the bolts
  24. Wait for 15 minutes
  25. Tighten the timing cover bolt(s)
  26. Chain cover plug:
  27. Refit the coolant pump
  28. Renew the seal
  29. Refit the crankshaft pulley
  30. Check for correct fitting
  31. Tighten the crankshaft pulley centre bolt
  32. Use the special tools
  33. Refit the oil strainer
  34. Oil filter:
  35. Refit the oil filter with bracket
  36. Refit the oil filter cartridge
  37. Refit the oil filter cover
  38. Use a special tool:
  39. Refit the plug
  40. Oil sump:
  41. Apply liquid sealing compound
  42. Refit the bolts
  43. Tighten the oil sump bolts
  44. Refit the oil drain plug
  45. Refit the oil level sensor (if fitted)
  46. Refit the oil filler cap
  47. Cylinder head cover:
  48. Apply sealant as indicated
  49. Coolant pump
  50. Reconnect the crankshaft position sensor
  51. Oil filter
  52. Oil sump
  53. Engine oil drain plug:
  54. Valve cover

Other TOYOTA 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.