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How to Replace timing chains on Vauxhall/Opel Astra H 1.3 CDTi

Special tools

  • Camshaft sprocket holding tool 1 – No.KM-6347.
  • Camshaft sprocket holding tool 2 – No.KM-956-1.
  • Camshaft locking tool(s) – No.EN-46781.
  • Tensioner locking tool – No.KM-955.
  • Crankshaft pulley hub holder – No.KM-662-C.
  • Crankshaft locking pin – No.EN-46785.

General precautions

  • Disconnect battery earth lead.
  • Remove glow plugs to ease turning engine.
  • Turn engine in normal direction of rotation (unless otherwise stated).
  • Observe tightening torques.
  • If fitted: Mark position of crankshaft position (CKP) sensor before removal.
  • Do NOT turn crankshaft via camshaft or other sprockets.
  • Do NOT turn crankshaft or camshaft with timing chain removed.
How to Replace timing chains on Vauxhall/Opel Astra H 1.3 CDTi
How to Replace timing chains on Vauxhall/Opel Astra H 1.3 CDTi

Valve timing procedures

  • Removal/installation of timing chain requires:
      • Sump removal.
  • Remove blanking plugs from camshaft housing [1] .
  • Install camshaft locking tools [2] .
  • Flat sections on camshaft locking tools must be in horizontal position [3] .

NOTE: Mark position of flat sections on camshaft locking tools with paint before installation [4] .

  • Turn crankshaft in direction of rotation until both camshaft locking tools are heard to engage.
  • Install crankshaft locking pin in bell housing hole [5] .
  • Install tensioner locking tool before carrying out engine repairs [6] .
  • Tighten crankshaft pulley hub bolt [7] . Tightening torque:
      • A = Agila/Agila-B/Astra-H/Meriva: 230 Nm.
      • B = Corsa-C/Combo-C/Corsa-D/Tigra-B: 50 Nm + 90°. Use new bolt.

NOTE: Crankshaft pulley hub bolt has LH thread.

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