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Home >> Mazda >> 2003 >> MPV ES >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls [System & Component Testing] >> Variable Valve Timing System >> Variable Valve Timing Actuator >> Miata (Stopper Pin Inspection)
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Miata (Stopper Pin Inspection)

  1. Disconnect negative battery cable.
  2. Remove timing belt. See TIMING BELT under REMOVAL & INSTALLATION in appropriate article in ENGINES.
  3. Hold hexagonal part of intake camshaft with an adjustable wrench to prevent camshaft from rotating. See Fig 1. Attempt to rotate variable valve timing actuator by hand and ensure it does not move. If variable valve timing actuator moves, stopper pin in variable valve timing actuator is not operating. Replace variable valve timing actuator.
    Fig 1: Checking Movement Of Variable Valve Timing Actuator
    G00143772Courtesy of MAZDA MOTORS CORP.
  4. Install timing belt. See TIMING BELT under REMOVAL & INSTALLATION in appropriate article in ENGINES.
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