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Home >> Mazda >> 2004 >> B4000 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [Engine] >> Engine Component Test >> Timing Chain Deflection - 2.3L, 3.0L and 4.0L Engines
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Timing Chain Deflection - 2.3L, 3.0L and 4.0L Engines

  1. Remove the engine front cover. See TIMING CHAIN REMOVAL/INSTALLATION - 2.3L , TIMING CHAIN REMOVAL/INSTALLATION - 3.0L or see ENGINE FRONT COVER REMOVAL/INSTALLATION - 4.0L .
  2. Rotate the crankshaft so the camshaft sprocket and crankshaft sprocket timing marks line up.
  3. Mark the top link(s) of the timing chain.
  4. Have an assistant hold the crankshaft sprocket with a suitable tool so it cannot turn.
  5. Place a machinist's scale above the timing chain (camshaft sprocket) to measure its movement.
  6. Put a torque wrench and socket on the camshaft sprocket bolt.
  7. Apply a maximum of 20 N.m (2 kgf.m, 15 ft.lbf) torque in a clockwise direction.
  8. Note the location of the marked link on the scale.
  9. Apply a maximum of 20 N.m (2 kgf.m, 15 ft.lbf) torque in a counterclockwise direction while measuring the amount the marked link moves.
  10. If movement is excessive, replace the timing chain; see TIMING CHAIN REMOVAL/INSTALLATION - 3.0L for 3.0L engine, see TIMING CHAIN REMOVAL/INSTALLATION - 4.0L for 4.0L engine.
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