Vauxhall Astra 1-8

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Keywords: Vauxhall Astra 1-8
Description: Manual - How to replace timing belt on Vauxhall/Opel Astra G 1.8i . Step by step guide.

  • Flywheel locking tool – Kent Moore No.KM-911.
  • Camshaft sprocket locking tool – Kent Moore No.KM-852.
  • Engine support tool (→2000 Astra/Zafira) – Kent Moore No.KM-6001.
  • Engine alignment tool (→2000 Astra/Zafira) – Kent Moore No.KM-909-B.
  • Engine support tool (2000→ Astra/Zafira) – Kent Moore No.KM-6001-A.
  • Engine alignment tool (2000→ Astra/Zafira) – Kent Moore No.KM-6173.
  • Engine support tool (Corsa) – Kent Moore No.KM-6169-3.
  • Engine alignment tool (Corsa) – Kent Moore No.KM-6169.
  • Engine support tool (Vectra-C/Signum) – Kent Moore No.KM-6313.
  • Auxiliary drive belt tensioner locking tool – Kent Moore No.KM-6130.
  • Engine alignment tool (→2004 Meriva) – Kent Moore No.KM-6169-1.
  • Engine alignment tool (2004→ Meriva) – Kent Moore No.KM-6394.
  • Disconnect battery earth lead.
  • DO NOT turn crankshaft or camshaft when timing belt removed.
  • Remove spark plugs to ease turning engine.
  • Turn engine in normal direction of rotation (unless otherwise stated).
  • DO NOT turn engine via camshaft or other sprockets.
  • Observe all tightening torques.
How to replace timing belt on Vauxhall/Opel Astra G 1.8i

WARNING: Certain engines require modification to tensioner pulley/guide pulleys due to possible failure. Refer to dealer.

  1. Remove air filter housing.
  2. Raise and support front of vehicle.
  3. Remove:
      • RH front wheel.
      • RH inner wing panel.
      • Engine top cover (if fitted).
  4. Mark direction of rotation on auxiliary drive belt with chalk.
  5. Turn auxiliary drive belt tensioner to release tension on belt. Use ring spanner.
  6. Insert 4 mm pin or locking tool No.KM-6130 through hole in tensioner and into mounting bracket [1] .
  7. Remove:
      • Auxiliary drive belt.
      • Timing belt upper cover [2] .
  8. Support engine:
      • Astra/Zafira →2000: Use tool Nos.KM-6001/KM-909-B.
      • Astra/Zafira 2000→: Use tool Nos.KM-6001-A/6173.
      • Corsa: Use tool Nos.KM-6169-3/6169.
      • Vectra-C/Signum: Use tool No.KM-6313.
      • Meriva →2004: Use tool No.KM-6169-A.
      • Meriva 2004→: Use tool No.KM-6394.
  9. Corsa/Astra/Vectra-C/Signum/Zafira/Meriva – remove:
      • Auxiliary drive belt tensioner.
      • RH engine mounting and bracket.
  10. Insert tool in bell housing to lock flywheel [3]. Tool No.KM-911.
  11. Remove:
      • Crankshaft pulley bolt [4] .
      • Crankshaft pulley [5] .
      • Timing belt lower cover [6] .
      • Flywheel locking tool [3] .
      • Camshaft position (CMP) sensor (if fitted).
  12. Temporarily fit crankshaft pulley bolt [4] .
  13. Turn crankshaft clockwise to TDC on No.1 cylinder. Ensure crankshaft timing marks aligned [7] .
  14. Timing marks on camshaft sprockets must be aligned with upper edge of cylinder head [8] .
  15. Lock camshaft sprockets. Use tool No.KM-852 [9] .
  16. Slacken tensioner bolt [10] .
  17. Turn tensioner clockwise until pointer on LH stop: Use Allen key [11].
      • Type 1 – [12] .
      • Type 2 – [17] .
  18. Lightly tighten tensioner bolt [10] .
  19. Remove timing belt.
NOTE: Observe direction of rotation marks on auxiliary drive belt.
  • Fit new crankshaft pulley bolt [4]. Tightening torque: 95 Nm + 30° + 15°.
  • Remove flywheel locking tool [3] .


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