MX-5 Miata LS L4-1.8L DOHC (2001)
Variable Valve Timing Actuator: Testing and Inspection
VARIABLE VALVE TIMING ACTUATOR INSPECTION
Stopper Pin
1. Disconnect the negative battery cable.
2. Remove the timing belt.
3. Hold a hexagonal part of the intake camshaft with a monkey wrench to prevent the camshaft from rotating. Attempt to rotate the variable timing
actuator by hand and verify that it does not move.
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If the variable valve timing actuator moves, the stopper pin in the variable valve timing actuator is not operating. Replace the variable valve
timing actuator.
4. Install in the timing belt.
Extreme Spark Retard Position
1. Disconnect the negative battery cable.
2. Remove the variable valve timing actuator.
Caution:
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If engine oil gets on parts, they may not function properly. When removing the variable valve timing actuator, be sure to cover the other parts
with a cloth to protect them from the oil.
3. Verify that the camshaft dowel pin hole on the variable valve timing actuator is aligned with the top of the third tooth, by counting back 3 teeth to
the sprocket gap which is aligned with the alignment mark.
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If not as specified, the stopper pin in the variable valve timing retard. Replace the variable valve timing actuator.
4. Install the variable valve timing actuator.
