TorqFix

Timing chain replacement: Opel Agila B 1.0 (K10B)

Step-by-step timing chain replacement for the Opel Agila B 1.0 (K10B): 147 steps. What to remove, in what order, and what to check after.

Timing chain replacement on the Agila B 1.0 12V with the K10B three-cylinder. The chain sits behind a cover that is sealed to the block and sump, so the oil is drained, the front and middle exhaust sections come off, the oil strainer is removed and the gearbox is supported on a transmission jack while the engine mounting bracket is unbolted. The ancillary belt, coolant pump pulley and crankshaft pulley come off with the special holding tools, followed by the timing chain cover, chain guide rail and tensioner. The new chain goes on together with the crankshaft gearwheel, with its marks aligned to the gearwheel marks. A new chain tensioner is fitted, the chain oiled, and the crankshaft turned clockwise by 2 turns to confirm the timing before the cover is sealed.

147 steps 1 engine code

🧭 Before you start

Drain the oil, remove the exhaust sections, oil strainer, ancillary belt, pulleys and engine mounting bracket with the gearbox supported. Remove the timing chain cover, guide rail and tensioner, then fit the new chain with the crankshaft gearwheel and align its marks. Fit a new tensioner, oil the chain, turn the engine 2 turns to check the marks, then seal and refit the cover and rebuild.

Fits: platform codes 1.0, 12V

  • Opens: engine oil
  • Timing position: the crankshaft or camshaft is set and locked during this job

Don't miss

  • Align the marks on the timing chain with the marks on the gearwheels.
  • Renew the chain tensioner rather than reusing the old one.
  • Apply clean engine oil to the chain, then rotate the crankshaft clockwise by 2 turns and check the marks.
  • Apply sealant to the timing chain cover before fitting.
  • Renew the exhaust gaskets when the front and middle sections go back.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

K10B

📋 Procedure

Preparation and removal

  1. Camshaft holding tool:
  2. Unless otherwise advised by the manufacturer, the following procedures are recommended:
  3. Engine mounting bracket
  4. Remove the ignition coils
  5. Remove the ventilation pipe
K10B? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Note: Avoid bending, torsion or traction
  2. Upper bolts, gearbox to engine:
  3. Oil drain plug:
  4. Impact absorber:
  5. Drain the engine oil
  6. Remove the exhaust pipe middle section
  7. Remove the gasket(s)
  8. Remove the front exhaust pipe
  9. Remove the oil strainer
  10. Vehicles with manual gearbox:
  11. Remove the gearbox mounting bolts
  12. Fit a transmission jack to support the transmission
  13. Vehicles with automatic transmission
  14. Move the harness aside
  15. Disconnect the bracket from the gearbox
  16. Fit a transmission jack to support the transmission
  17. All vehicles:
  18. Lower the vehicle
  19. Vehicles with air conditioning:
  20. Loosen the bolt slightly to release the tension
  21. Remove the coolant pump pulley
  22. Use a special tool to hold the crankshaft pulley
  23. Use the special tools to remove the crankshaft pulley
  24. Use the special tools to remove the crankshaft pulley
  25. Remove the lifting eye
  26. Remove the engine mounting bracket
  27. Remove the timing chain cover
  28. Remove the studs
  29. Remove the chain guide rail

Installation and checks

  1. Align the marks on the timing chain with the marks on the gearwheel
  2. Fit the timing chain together with the crankshaft gearwheel
  3. Refit the chain guide rail
  4. Renew the chain tensioner
  5. Fit the chain tensioner
  6. Apply clean engine oil to the timing chain
  7. Rotate the crankshaft clockwise by 2 turns
  8. Check the timing marks
  9. Refit the studs
  10. Refit the timing chain cover
  11. Note: Apply sealant before fitting
  12. Replace the oil filter(s)
  13. Refit the drain plug
  14. Refit the front exhaust pipe
  15. Renew the gasket
  16. Refit the middle exhaust pipe
  17. Renew the gasket
  18. Refit the lifting eye
  19. Refit the harness clip
  20. Use the special tools to refit the crankshaft pulley
  21. Use the special tools to refit the crankshaft pulley
  22. Refit the crankshaft pulley
  23. Fit the tensioner bracket
  24. Refit the coolant pump pulley
  25. Note: Finger-tight only
  26. All vehicles:
  27. Refit the front right splash guard
  28. Refit the front right wheel
  29. The tension is set at a deflection of:
  30. New belt:
  31. Tighten the bolts
  32. Turn the bolt to tension the belt
  33. Tighten the coolant pump pulley
  34. Renew the cylinder head gasket
  35. Refit the cylinder head cover
  36. Refit the breather pipe
  37. Refit the ventilation pipe
  38. Refit and connect the ignition coils
  39. Refit the air filter
  40. Refill the engine oil
  41. Reconnect the battery earth cable

Other OPEL / VAUXHALL 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.

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Workshop data on this page last updated 20 Sep 2026.