Mazda B-Series 1998-06

Oil Pump

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Inspection



The oil pump is responsible for providing constant lubrication to the whole engine and so it is recommended that a new oil pump be installed when rebuilding the engine.

Completely disassemble the oil pump and thoroughly clean all of the components. Inspect the oil pump gears and housing for wear and/or damage. Insure that the pressure relief valve operates properly and there is no binding or sticking due to varnish or debris. If all of the parts are in proper working condition, lubricate the gears and relief valve, and assemble the pump.

Removal & Installation



The oil pump is located on the front of the engine and is turned by the timing belt.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the timing belt.
  4.  
  5. Detach the camshaft position sensor (CMP) electrical connector.
  6.  
  7. Remove the oil pump sprocket bolt and sprocket.
  8.  

Use a prybar or drift through one of the holes in the pump sprocket to keep it from turning while loosening the bolt.

  1. Unbolt the camshaft position sensor.
  2.  
  3. Remove the four bolts retaining the oil pump to the engine block.
  4.  
  5. Remove the oil pump from the front of the engine and discard the pump-to-block gasket.
  6.  
  7. Inspect the oil pump and O-rings and replace as necessary. Clean all gasket mating surfaces thoroughly.
  8.  
  9. Installation is the reverse of the removal procedure, however note the following:
    1. Prime the oil pump and with 8 ounces (236ml) of new engine oil and lubricate the O-rings with same.
    2.  
    3. Use a new pump-to-block gasket.
    4.  
    5. Tighten the oil pump bolts to 89-123 inch lbs. (10-14 Nm), the camshaft position sensor bolts to 45-61 inch lbs. (5-7 Nm) and the oil pump sprocket bolt to 30-40 ft. Lbs. (40-55 Nm).
    6.  

  10.  

2.3L Engine

NOTE
The oil pump is located on the front of the engine and is turned by the timing belt.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Timing chain
     
    Oil pump chain and sprockets
     
    Oil pan
     
    Oil pump pickup tube and gasket
     
    Oil pump assembly and gasket
     

  4.  

To install:

  1. Turn the crankshaft clockwise to position the No. 1 piston.
  2.  
  3. Remove the plug bolt.
  4.  
  5. Install the Engine Timing Peg 303-507.
    NOTE
    Clean the gasket surface with metal surface cleaner.



    Click image to see an enlarged view

    Fig. Oil pump torque sequence-2.3L



    Click image to see an enlarged view

    Fig. Oil pump pickup tube torque sequence-2.3L

  6.  
  7. Install a new gasket and the oil pump assembly. Tighten the bolts in the sequence shown in two stages.

    Step 1: Tighten the bolts to 10 Nm (80 inch lbs.)
     
    Step 2: Tight the bolts to 23 Nm (17 ft. lbs.)
     

  8.  
  9. Install a new oil pump pickup tube gasket and the pickup tube. Tighten the bolts in the sequence shown
  10.  

2.5L Engine

NOTE
The oil pump is located on the front of the engine and is turned by the timing belt.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Use a prybar or drift through one of the holes in the pump sprocket to keep it from turning while loosening the bolt.



    Negative battery cable
     
    Timing belt
     
    Camshaft Position (CMP) sensor electrical connector
     
    Oil pump sprocket
     
    CMP sensor
     



    4 bolts retaining the oil pump to the engine block
     
    Oil pump from the front of the engine and discard the gasket
     

  4.  
  5. Inspect the oil pump and O-rings and replace as necessary.
  6.  
  7. Clean all gasket mating surfaces thoroughly.
  8.  

To install:

  1. Prime the oil pump and with 8 ounces (236ml) of new engine oil and lubricate the O-rings.
  2.  
  3. Install or connect the following:

    New gasket on the oil pump
     
    Oil pump. Torque the bolts to 89 inch lbs. (10 Nm).
     
    CMP sensor. Torque the bolts to 61 inch lbs. (7 Nm).
     
    Oil pump sprocket bolt. Torque the bolt to 40 ft. lbs. (55 Nm).
     
    CMP sensor electrical connector
     
    Timing belt
     
    Negative battery cable
     

  4.  
  5. Fill the engine with clean oil.
  6.  
  7. Start the vehicle and check for leaks, repair if necessary.
  8.  

3.0L & 4.0L OHV Engines

NOTE
On 4.0L it is necessary to remove the engine.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Oil pan
     
    Oil pick-up and tube assembly from the pump
     
    Oil pump retainer bolts and the oil pump
     

  6.  

To install:

  1. Prime the oil pump with clean engine oil by filling either the inlet or outlet port. Rotate the pump shaft to distribute the oil within the pump body.
  2.  
  3. Install the oil pump and tighten the mounting bolts to:
  4.  
  5. 3.0L: 30-40 ft. lbs. (41-54 Nm).
  6.  
  7. 4.0L: 13-15 ft. lbs. (18-20 Nm).
    WARNING
    Do not force the oil pump if it does not seat readily. The oil pump driveshaft may be misaligned with the distributor or shaft assembly. If the pump is tightened down with the driveshaft misaligned, damage to the pump could occur. To align, rotate the intermediate driveshaft into a new position.

  8.  
  9. Install or connect the following:

    Oil pick-up and tube assembly
     
    Oil pan
     

  10.  
  11. Fill the engine with clean oil.
  12.  
  13. Start the vehicle and check for leaks, repair if necessary.
  14.  

3.0L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
    NOTE
    On some vehicles, when the battery cable is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven to relearn its strategy.

  4.  
  5. Raise and support the vehicle safely.
  6.  
  7. Drain the engine oil.
  8.  
  9. Remove or disconnect the following:

    Oil pan
     
    Oil pick-up and tube assembly from the pump
     
    Oil pump retainer bolts and the oil pump
     

  10.  

To install:

Click image to see an enlarged view

Fig. Oil pump installed-3.0L engine

  1. Prime the oil pump with clean engine oil by filling either the inlet or outlet port. Rotate the pump shaft to distribute the oil within the pump body.
  2.  
  3. Install the oil pump and tighten the mounting bolts to 30-40 ft. lbs. (41-54 Nm).
  4.  
  5. Install or connect the following:

    Oil pick-up and tube assembly
     
    Oil pan
     

  6.  
  7. Fill the engine with clean oil.
  8.  
  9. Start the vehicle and check for leaks, repair if necessary.
  10.  

4.0L Engine

NOTE
The oil pump cannot be removed with the engine in the vehicle.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
    NOTE
    On some vehicles, when the battery cable is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven to relearn its strategy.

  4.  
  5. Raise and support the vehicle safely.
  6.  
  7. Drain the engine oil.
  8.  
  9. Remove or disconnect the following:

    Engine from the vehicle
     
    Oil pan
     
    Unbolt the oil pick-up tube
     
    The 8 ladder frame bolts that were under the oil pan
     
    The 2 rear outer ladder frame bolts
     
    The 7 left-hand and the 8 right-hand ladder frame bolts
     
    The ladder frame from the engine
     
    The 2 oil pump attaching bolts and the pump.
     

  10.  

To install:

Click image to see an enlarged view

Fig. Oil pump installation-4.0L engine

  1. Submerge the pump in clean engine oil to prime it.
  2.  
  3. Install or connect the following:

    The ladder frame on the engine
     
    The 8 right-hand and 7 left-hand ladder frame bolts
     
    The 2 rear outer and the 8 frame bolts under the pan
     
    The oil pump. Torque the bolts to 13-15 ft. lbs. (17-21 Nm).
     
    Oil pick-up tube
     
    Oil pan
     
    Engine to the vehicle
     
    Negative battery cable
     

  4.  
  5. Fill the engine with clean oil.
  6.  
  7. Start the vehicle and check for leaks, repair if necessary.
  8.  

SOHC Engines

NOTE
The oil pump cannot be removed with the engine in the vehicle.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:

    Engine from the vehicle
     
    Oil pan
     
    Unbolt the oil pick-up tube
     
    The 8 ladder frame bolts that were under the oil pan
     
    The 2 rear outer ladder frame bolts
     
    The 7 left-hand and the 8 right-hand ladder frame bolts
     
    The ladder frame from the engine
     
    The 2 oil pump attaching bolts and the pump.
     

  6.  

To install:

  1. Submerge the pump in clean engine oil to prime it.
  2.  
  3. Install or connect the following:

    The ladder frame on the engine
     
    The 8 right-hand and 7 left-hand ladder frame bolts
     
    The 2 rear outer and the 8 frame bolts under the pan
     
    The oil pump. Torque the bolts to 13-15 ft. lbs. (17-21 Nm).
     
    Oil pick-up tube
     
    Oil pan
     
    Engine to the vehicle
     
    Negative battery cable
     

  4.  
  5. Fill the engine with clean oil.
  6.  
  7. Start the vehicle and check for leaks, repair if necessary.
  8.  

 
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