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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (Service Information MZR 2.5) >> Variable Valve Timing Actuator Inspection

Variable Valve Timing Actuator Inspection

CAUTION:
  • The variable valve timing actuator cannot be disassembled because it is a precision unit.
  1. Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION [MZR 2.5] .)
  2. Disconnect the negative battery cable.
  3. Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
  4. Disconnect the wiring harness.
  5. Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION .)
  6. Remove the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION .)
  7. Remove the ventilation hose.
  8. Remove the oil level gauge.
  9. Remove the cylinder head cover. (See TIMING CHAIN REMOVAL/INSTALLATION .)
  10. Inspect the variable valve timing actuator for damage around the stopper pin cap (A), or a missing stopper pin cap (B), spring and stopper.
    Fig 1: Identifying Stopper Pin Caps
    G08151882
    • If no parts are damaged or missing, go to the next step.
    • If any parts are damaged or missing, replace the variable valve timing actuator.
    CAUTION:
    • If any parts are damaged or missing, remove the front cover to inspect the timing and oil pump chains and all related components for damage as a result of lost parts. Replace components if necessary.
    • If the lost parts cannot be located in the timing chain area, it will be necessary to remove the oil pan to retrieve them.
  11. Turn the crankshaft clockwise so that the notches on the variable valve timing actuator can be checked.
    Fig 2: Identifying Cover, Notch And Rotor
    G08151883
  12. Turn the camshaft counterclockwise to align the notches on the variable valve timing actuator.
    Fig 3: Locating Notches On Variable Valve Timing Actuator
    G08151884
  13. With the notches aligned, turn the camshaft clockwise 30 degrees.
    Fig 4: Turning Camshaft Clockwise 30 Degrees
    G08151885
  14. Verify the notches again.
    Fig 5: Locating Notches On Variable Valve Timing Actuator
    G08151886
    • A: If the notches are not aligned, replace the variable valve timing actuator.
    • B: If the notches are aligned, there is no problem with the variable valve timing actuator and this information is not applicable.
    NOTE:
    • In some rare cases, the timing chain tensioner ratchet lock may get stuck, which will require the removal of the engine front cover.
  15. Install in the reverse order of removal.
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