Mazda B-Series 1998-06

Oil Pan

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Removal & Installation



  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. Drain the engine oil.
  6.  
  7. Raise and support the vehicle safely.
  8.  
  9. Remove the transmission. Remove the flywheel or flexplate.
  10.  
  11. If equipped with coil springs, remove the air cleaner outlet tube. Remove the nuts from the engine mounts. Using an engine lifting device, raise the engine about 1.72 inches. Install blocks between the engine mounts and the support brackets.
  12.  
  13. Remove the oil pan retaining bolts. Remove the oil pan. Discard the oil pan gasket.
  14.  

To install:

  1. Apply a 1 / 8 (4mm) bead of RTV sealer to the junctions of the rear main bearing cap and block, and the front cover and block. The oil pan must be installed within 15 minutes, after applying the sealant.
  2.  
  3. Position a new pan gasket on the pan. Be sure to align the fastener holes and secure the gasket with gasket clips. Install the oil pan.
  4.  
  5. Torque the bolts to specification and in the proper sequence.
  6.  
  7. Continue the installation in the reverse order of the removal procedure.
  8.  

2-Wheel Drive
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:
    WARNING
    On models equipped with distributor ignition, failure to remove the distributor will damage or break it when the engine is lifted.


    NOTE
    The oil pan fits tightly between the transmission spacer plate and oil pump pick-up tube. Use care when removing the oil pan from the engine.



    Negative battery cable
     
    Oil level dipstick tube
     
    Fan shroud. Leave the fan shroud over the fan assembly
     
    Motor mount nuts from the frame
     



    Starter
     
    Transmission inspection cover
     
    Right hand axle I-beam. The brake caliper must be removed and secured out of the way.
     
    Oil pan attaching bolts, using a suitable lifting device, raise the engine about 2 in. (5cm)
     
    Oil pan and discard the gasket
     

  6.  
  7. Clean all gasket surfaces on the engine and oil pan. Remove all traces of old gasket and/or sealer.
  8.  

To install:

  1. Apply a 1 / 8 (4mm) bead of RTV sealer to the junctions of the rear main bearing cap and block, and the front cover and block. The sealer sets in 15 minutes, so work quickly!
  2.  
  3. Apply adhesive to the gasket surfaces and install the oil pan gasket.
  4.  
  5. Install or connect the following:

    Oil pan on the engine block. Torque the bolts EVENLY to 9 ft. lbs. (12 Nm) working from the center to the end position on the oil pan.
     
    Right hand axle I-beam
     
    Brake caliper
     
    Transmission inspection cover
     
    Starter
     
    Fan shroud
     
    Motor mount retaining nuts
     
    Oil level dipstick tube
     
    Negative battery cable
     

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



Click image to see an enlarged view

Fig. Oil pan sealer application (arrows indicate location)-3.0L engine



Click image to see an enlarged view

Fig. Oil pan bolt torque sequence-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. Drain the engine oil.
  6.  
  7. Remove or disconnect the following:
    NOTE
    The oil pan fits tightly between the transmission spacer plate and oil pump pick-up tube. Use care when removing the oil pan from the engine.



    Oil level dipstick tube
     
    Fan shroud. Leave the fan shroud over the fan assembly
     
    Motor mount nuts from the frame
     
    Starter
     
    Transmission inspection cover
     
    Right hand axle I-beam. The brake caliper must be removed and secured out of the way.
     
    Oil pan attaching bolts, using a suitable lifting device, raise the engine about 2 in. (5cm)
     
    Oil pan and discard the gasket
     

  8.  
  9. Clean all gasket surfaces on the engine and oil pan. Remove all traces of old gasket and/or sealer.
  10.  

To install:

  1. Apply a 1 / 8 (4mm) bead of RTV sealer to the junctions of the rear main bearing cap and block, and the front cover and block. The oil pan must be installed within 15 minutes, after applying the sealant.
  2.  
  3. Apply adhesive to the gasket surfaces and install the oil pan gasket.
  4.  
  5. Install or connect the following:

    Oil pan on the engine block. Torque the bolts to 9 ft. lbs. (12 Nm) and in the proper sequence.
     
    Right hand axle I-beam
     
    Brake caliper
     
    Transmission inspection cover
     
    Starter
     
    Fan shroud
     
    Motor mount retaining nuts
     
    Oil level dipstick tube
     
    Negative battery cable
     

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

2.3L Engine
  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
     
    Engine oil level indicator assembly
     
    Engine oil pan bolts and oil pan
     

  6.  

To install:

  1. Clean and inspect all mating surfaces.
    NOTE
    The oil pan must be installed and the bolts tightened with four minutes of applying the silicone gasket and sealant.

  2.  
  3. Apply a 2.5 mm bead of silicone gasket and sealant to the oil pan. Install the oil pan. Tighten the oil pan in the sequence shown.

    Click image to see an enlarged view

    Fig. Oil pan torque sequence-2.3L

  4.  
  5. Lubricate the O-ring with clean engine oil and install the engine oil level indicator assembly.
  6.  
  7. Install the engine into the vehicle.
  8.  

2.5L 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
     
    Engine from the vehicle and place it on a suitable engine stand
     
    Oil pan and discard the gasket
     

  6.  

To install:

Click image to see an enlarged view

Fig. Tighten the oil pan bolts in sequence-2.5L engines

  1. Clean the mating surface on the oil pan.
  2.  
  3. Install or connect the following:

    Oil pan gasket
     
    Apply a bead of silicone sealant to the oil pan
     
    Oil pan. Torque the bolts in sequence to 141 inch lbs. (16 Nm).
     
    Engine
     
    Negative battery cable
     

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

4-Wheel Drive
  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
     
    Engine from the vehicle and place it on a suitable engine stand
     
    Oil pan and discard the gasket
     

  6.  

To install:

  1. Install or connect the following:

    New oil pan gasket and secure the gasket with trim adhesive
     
    Oil pan. Torque the bolts to 9 ft. lbs. (12 Nm).
     
    Engine
     
    Negative battery cable
     

  2.  
  3. Fill the engine with clean oil.
  4.  
  5. Start the vehicle and check for leaks, repair if necessary.
  6.  

  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. Drain the engine oil.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Engine from the vehicle and place it on a suitable engine stand
     
    Oil pan and discard the gasket
     

  8.  

To install:

  1. Apply a 1 / 8 (4mm) bead of RTV sealer to the junctions of the rear main bearing cap and block, and the front cover and block. The oil pan must be installed within 15 minutes, after applying the sealant.
  2.  
  3. Install or connect the following:

    New oil pan gasket
     
    Oil pan. Torque the bolts to 9 ft. lbs. (12 Nm) and in the proper sequence
     
    Engine
     
    Negative battery cable
     

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

4.0L Engine

NOTE
The 2002 engine does not use an oil pan in the conventional sense. There is a separate access panel that unbolts from what would be considered the oil pan (which is now known as the ladder frame).

  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 the oil pan retaining bolts. Remove the oil pan and discard the gasket

    Click image to see an enlarged view

    Fig. Oil pan installation-2002 4.0L engine



    Click image to see an enlarged view

    Fig. Oil pan bolt torque sequence-2003-2006 4.0L engine

  10.  

To install:

  1. Install or connect the following:

    New gasket and oil pan. On the 2002 vehicles, torque the bolts to 80 inch lbs. (9 Nm). On 2003-2006 vehicles torque the bolts to 18 ft. lbs. (25 Nm) and in the proper sequence.
     
    Negative battery cable
     

  2.  
  3. Fill the engine with clean oil.
  4.  
  5. Start the vehicle and check for leaks, repair if necessary.
  6.  

OHV Engines

NOTE
Review the complete service procedure before starting this repair.

  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
     
    Engine from the vehicle and mount the engine on a suitable engine stand with the oil pan facing up
     
    Oil pan attaching bolts (note location of 2 spacers) and remove the pan from the engine block
     
    Oil pan gasket and crankshaft rear main bearing cap wedge seal
     

  6.  
  7. Clean all gasket surfaces on the engine and oil pan. Remove all traces of old gasket and/or sealer.
  8.  

To install:

  1. Install or connect the following:

    New crankshaft rear main bearing cap wedge seal. The seal should fit snugly into the sides of the rear main bearing cap

    Click image to see an enlarged view

    Fig. The correct spacer must be used to extend the mounting surface of the oil pan so it is flush with the mounting surface of the engine block-4.0L engine

     
    New oil pan gasket to the engine block and place the oil pan in correct position on the 4 locating studs. Torque the bolts EVENLY to 60-84 inch lbs. (7-10 Nm).
     
    Transmission bolts to the engine and oil pan. There are 2 spacers on the rear of the oil pan to allow proper mating of the transmission and oil pan.
     
    Spacers to the mounting pads on the rear of the oil pan before bolting the engine and transmission together
     
    Engine to the vehicle
     
    Negative battery cable
     

  2.  
  3. Fill the engine with clean oil.

    Start the vehicle and check for leaks, repair if necessary.
     

  4.  

SOHC Engines

NOTE
The 4.0L SOHC engine does not use an oil pan in the conventional sense. There is a separate access panel that unbolts from what would be considered the oil pan (which is now known as the ladder frame).

  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 and discard the gasket
     

  6.  

To install:

  1. Install or connect the following:

    New gasket and oil pan. Torque the bolts to 80 inch lbs. (9 Nm).
     
    Negative battery cable
     

  2.  
  3. Fill the engine with clean oil.
  4.  
  5. Start the vehicle and check for leaks, repair if necessary.
  6.  

 
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