Mazda B-Series 1998-06

Valve Covers

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Removal & Installation



2.3L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove or disconnect the following:

    Intake manifold assembly
     
    Cylinder head temperature (CHT) sensor boot and electrical connector
     
    Engine wiring harness from the valve cover studs
     
    Spark plug wires and ignition coil
     
    Camshaft position sensor
     
    Crankcase ventilation tube
     
    Bolts and the valve cover
     
    If necessary, valve cover gaskets.
     

  6.  

To install:

Click image to see an enlarged view

Fig. Valve cover tightening sequence

  1. Install new valve cover gaskets if removed.
  2.  
  3. Tighten valve cover bolts in sequence to: 7 ft. lbs (10 Nm).
  4.  
  5. To complete installation, reverse remaining removal procedure.
  6.  

2.5L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove or disconnect the following:

    Intake air temperature (IAT) sensor.
     
    Air cleaner outlet tube
     
    Accelerator control splash shield
     
    Accelerator cable
     
    Crankcase vent from the valve cover
     
    Fuel charging wiring from the idle air control (IAC) valve and the throttle position (TP) sensor
     
    Intake side spark plug wires from the front ignition coil
     
    Side spark plug wire retainer from the studs on the valve cover
     
    Throttle body
     
    Vacuum line from EGR valve and intake
     
    8 valve cover bolts
     

  6.  

To install:

  1. Install a new valve cover gasket on the valve cover.
  2.  
  3. To complete installation, reverse remaining removal procedure.
  4.  
  5. Tighten valve cover bolts to: 115 inch lbs (13 Nm).
  6.  

 
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