WARNING:
A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing.
CAUTION:
Do not disassemble the hydraulic variable valve timing actuator because it is a precision unit.
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Remove the plug hole plate..
4. Remove the ignition coil/ion sensors..
5. Remove the cylinder head cover..
6. Verify that the notch of the rotor and projection of the cover on the hydraulic variable valve timing actuator are aligned and fitted.

If the notch of the rotor and projection of the cover are not aligned, rotate the crankshaft in the direction the engine rotates two turns and verify that they are aligned.
If the notch of the rotor and projection of the cover are still not aligned, replace the hydraulic variable valve timing actuator..
If, when turning the crankshaft, there is a hitting noise from the hydraulic variable valve timing actuator each time before the cam reaches its maximum lift, it means that the actuator is not secured. Replace the hydraulic variable valve timing actuator..
7. Install in the reverse order of removal.
Variable Valve Timing Actuator Removal/Installation [Mzr 2.3 Disi Turbo]Engine SST [Skyactiv G 2.0]
1: Mazda SST number
2: Global SST number
Example
1:49 UN20 5072
2:205–072
Holder
1: –
2: 134-01049A
Evaporative emission system tester
1:–
2:AKS042808
Adapter
1: 49 UN ...
Drive Plate Removal/Installation [Fw6 A EL]
1. Remove the transaxle..
2. Remove in the order indicated in the table.
1
Drive plate installation bolts
(See Drive Plate Installation Bolts Removal Note.)
(See Drive Plate Installation Bolts Installation Note.)
2
Backing plate
...
Purge Solenoid Valve Inspection [Mzr 2.0, Mzr 2.5]
Airflow Inspection
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Remove the purge solenoid valve..
4. Inspect airflow between the ports under the following conditions.
Measured condition
Continuity between A—B
...