2003-’08 Mazda6 (2.3L)

2004-’08 Mazda3 with VINs lower than JM1BK******864673

2006-’08 Mazda5 with VINs lower than JM1CR******306808

2006-’08 MX-5 with VINs lower than JM1NC******146287

When the engine is first started, some vehicles may exhibit a loud ticking noise from the variable valve timing (VVT) actuator. This is caused by the lock pin of the VVT actuator not fully engaging or from a worn lock pin hole. Heat treatment has now been added around the hole of the VVT rotor lock pin to prevent this from ­happening.

Repair Procedure:

1. Verify customer concern.

2. Write down the customer’s radio station presets.

3. After the engine cools down, disconnect the negative battery cable (to prevent DTCs from being stored).

4. Remove the cylinder head cover.

5. Turn the crankshaft clockwise so that the notches on the VVT actuator can be checked.

a. If the notches are not aligned, go to the next step.

b. If the notches are aligned, there is no problem with the VVT actuator and this information is not applicable. Refer to MS3 for troubleshooting. (Fig. 1)

6. Turn the camshaft counterclockwise to align the notches on the VVT actuator. (Fig. 2)

7. With the notches aligned, turn the camshaft clockwise 90 degrees. (Fig. 3)

8. Check the notches again.

a. If the notches are not aligned, go to the next step.

b. If the notches are aligned, there is no problem with the VVT actuator and this information is not applicable. Refer to MS3 for troubleshooting. (Fig. 4)

9. Replace the VVT actuator.

10. Set the customer’s radio station presets.

11. Start the engine to verify there is no fuel leakage around the high-pressure fuel pump.

12. After the engine cools down, change the engine oil.

13. Verify the repair.