Valve Cover - LH Removal/Installation - 4.0L

All vehicles 

1. Disconnect the negative battery cable. See BATTERY DISCONNECT .
2. Detach the accelerator cable from the throttle body and the accelerator cable bracket.
   Fig 1: Detaching Accelerator Cable From Throttle Body And Accelerator Cable Bracket

   Courtesy of MAZDA MOTORS CORP.
3. Loosen the bolt and disconnect the electrical connector.
   Fig 2: Loosening Bolt - With Torque Specification

   Courtesy of MAZDA MOTORS CORP.

Early build vehicles 

4. Disconnect the vapor hose end from the intake manifold.
   Fig 3: Disconnecting Vapor Hose End From Intake Manifold

   Courtesy of MAZDA MOTORS CORP.
5. Disconnect the vapor hose end and the pin-type retainer and remove the vapor hose.
   Fig 4: Disconnecting Vapor Hose End And Pin-Type Retainer

   Courtesy of MAZDA MOTORS CORP.

Late build vehicles 

6. Disconnect the vapor hose from the intake manifold.
   Fig 5: Disconnecting Vapor Hose From Intake Manifold

   Courtesy of MAZDA MOTORS CORP.

All vehicles 

7. Disconnect the camshaft position (CMP) sensor electrical connector.
   Fig 6: Disconnecting Camshaft Position Sensor Electrical Connector

   Courtesy of MAZDA MOTORS CORP.
8. Remove the differential pressure feedback exhaust gas recirculation (EGR) system.
   Fig 7: Removing Differential Pressure Feedback Exhaust Gas Recirculation System

   Courtesy of MAZDA MOTORS CORP.
9. Remove the EGR vacuum regulator solenoid valve.
   1. Disconnect the electrical connector.
   2. Disconnect the vacuum connection.
   3. Remove the retaining bolts and the solenoid valve.
   Fig 8: Removing EGR Vacuum Regulator Solenoid Valve

   Courtesy of MAZDA MOTORS CORP.
10. Disconnect the fuel tube push connect coupling. See FUEL LINE AND VAPOR LINE QUICK DISCONNECT FITTINGS .
11. Remove the fuel supply tube bracket bolt.
    Fig 9: Removing Fuel Supply Tube Bracket Bolt

    Courtesy of MAZDA MOTORS CORP.
12. Detach the vapor tube pin-type retainer, if equipped, and remove the fuel tube-to-valve cover bracket bolt. Position the fuel supply tube aside.
    Fig 10: Removing Fuel Tube-To-Valve Cover Bracket Bolt - With Torque Specification

    Courtesy of MAZDA MOTORS CORP.
13. Disconnect the vacuum hose and the EGR tube fitting from the EGR valve.
    Fig 11: Disconnecting Vacuum Hose And EGR Tube Fitting From EGR Valve - With Torque Specification

    Courtesy of MAZDA MOTORS CORP.
14. Remove the bolt and position the electrical connector aside. Disconnect the radio interference capacitor electrical connector.
    Fig 12: Removing Bolt - With Torque Specification

    Courtesy of MAZDA MOTORS CORP.
15. Carry out the following:
    • Detach the two spark plug wire retainers.
      CAUTION:

      • It is important to twist the spark plug wire boots while pulling upward to avoid possible damage to the spark plug wire.
      NOTE:

      • Spark plug wires must be connected to the correct ignition coil terminal. Mark spark plug wire locations before removing them.
    • Disconnect the LH spark plug wires from the ignition coil.
    Fig 13: Detaching Spark Plug Wires

    Courtesy of MAZDA MOTORS CORP.
16. Disconnect the ignition coil electrical connector.
    Fig 14: Disconnecting Ignition Coil Electrical Connector

    Courtesy of MAZDA MOTORS CORP.
17. Remove the ignition coil bracket lower bolts.
    Fig 15: Removing Ignition Coil Bracket Lower Bolts - With Torque Specification

    Courtesy of MAZDA MOTORS CORP.
18. Remove the ignition coil bracket upper bolts and position the ignition coil aside.
    Fig 16: Removing Ignition Coil Bracket Upper Bolts - With Torque Specification

    Courtesy of MAZDA MOTORS CORP.
19. Disconnect the positive crankcase ventilation (PCV) hose.
    Fig 17: Disconnecting Positive Crankcase Ventilation Hose

    Courtesy of MAZDA MOTORS CORP.
20. Remove the PCV valve from the valve cover and position aside.
    Fig 18: Removing PCV Valve

    Courtesy of MAZDA MOTORS CORP.
21. Disconnect the LH fuel injector electrical connectors and detach the wire harness pin-type retainer on the valve cover stud.
    Fig 19: Disconnecting LH Fuel Injector Electrical Connectors

    Courtesy of MAZDA MOTORS CORP.
22. Remove the bolts and the valve cover.
    Fig 20: Removing Bolts And Valve Cover - With Torque Specification

    Courtesy of MAZDA MOTORS CORP.
23. To install, reverse removal procedure.