Mazda MPV 1999-06

Camshaft, Bearings & Lifters

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Removal & Installation



2.5L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Drain the engine oil.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Intake manifold
     
    Accessory drive belt
     
    Power steering pump
     
    Intake Manifold Runner Control (IMRC) actuator
     
    Spark plug wires
     
    Ignition coil
     
    Exhaust front pipe
     
    Oil pan
     
    Alternator and bracket
     
    A/C compressor
     
    Water pump belt and drive pulley
     
    Camshaft oil seal housing
     
    Wiring harness connector bracket
     
    Valve covers
     
    Front cover
     
    Timing chains
     

  8.  


NOTE
Keep all valvetrain components in order for assembly


NOTE
Remove the camshaft thrust bearing caps before loosening any of the other bearing cap bolts.



Camshaft thrust bearing caps. Loosen the bolts evenly in several passes.
 
Remaining camshaft bearing caps. Loosen the bolts evenly in several passes.
 
Camshafts
 
Rocker arms
 
Hydraulic lifters
 



Click image to see an enlarged view

Fig. Right bank camshaft thrust cap loosening sequence-2.5L and 3.0L engine



Click image to see an enlarged view

Fig. Left bank camshaft thrust cap loosening sequence-2.5L and 3.0L engine



Click image to see an enlarged view

Fig. Right bank camshaft bearing cap loosening sequence-2.5L and 3.0L engine



Click image to see an enlarged view

Fig. Left bank camshaft bearing cap loosening sequence-2.5L and 3.0L engine

To install:


WARNING
The crankshaft keyway must be at the 11 o'clock position before reassembly. Failure to do so may lead to engine damage.

  1. Rotate the crankshaft so that the keyway is at the 11 o'clock position for installation of the camshafts.
  2.  
  3. Install or connect the following:

    Hydraulic lifters
     
    Rocker arms.
     
    Camshafts. Align the sprocket timing marks.
     

  4.  


NOTE
Do not install the camshaft journal thrust caps until the rocker arms and timing chains have been installed and the camshaft journal caps are secured into position.



All camshaft journal caps except the thrust caps.
 
Timing chains. Tighten the camshaft journal cap bolts in reverse of the loosening order and in several steps to 71-106 inch lbs. (8-12 Nm).
 
Thrust caps. Tighten the bolts to 71-106 inch lbs. (8-12 Nm).
 
Front cover
 
Valve covers
 
Wiring harness connector bracket
 
Camshaft oil seal housing
 
Water pump belt and drive pulley
 
A/C compressor
 
Alternator and bracket
 
Oil pan
 
Exhaust front pipe
 
Ignition coil
 
Spark plug wires
 
IMRC actuator
 
Power steering pump
 
Accessory drive belt
 
Intake manifold
 
Negative battery cable
 

  1. Fill the crankcase to the correct level.
  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Drain the engine oil.
  6.  
  7. Remove or disconnect the following:
    NOTE
    Keep all valvetrain components in order for assembly


    NOTE
    Remove the camshaft thrust bearing caps before loosening any of the other bearing cap bolts.



    Negative battery cable
     
    Intake manifold
     
    Accessory drive belt
     
    Power steering pump
     
    Intake Manifold Runner Control (IMRC) actuator
     
    Spark plug wires
     
    Ignition coil
     
    Exhaust front pipe
     
    Oil pan
     
    Alternator and bracket
     
    A/C compressor
     
    Water pump belt and drive pulley
     
    Camshaft oil seal housing
     
    Wiring harness connector bracket
     
    Valve covers
     
    Front cover
     
    Timing chains
     



    Camshaft thrust bearing caps. Loosen the bolts evenly in several passes.
     
    Remaining camshaft bearing caps. Loosen the bolts evenly in several passes.
     
    Camshafts
     
    Rocker arms
     
    Hydraulic lifters

    Click image to see an enlarged view

    Fig. Right bank camshaft thrust cap loosening sequence-2.5L engine



    Click image to see an enlarged view

    Fig. Left bank camshaft thrust cap loosening sequence-2.5L engine



    Click image to see an enlarged view

    Fig. Right bank camshaft bearing cap loosening sequence-2.5L engine



    Click image to see an enlarged view

    Fig. Left bank camshaft bearing cap loosening sequence-2.5L engine

     

  8.  

To install:


WARNING
The crankshaft keyway must be at the 11 o'clock position before reassembly. Failure to do so may lead to engine damage.

  1. Rotate the crankshaft so that the keyway is at the 11 o'clock position for installation of the camshafts.
  2.  
  3. Install or connect the following:
    NOTE
    Do not install the camshaft journal thrust caps until the rocker arms and timing chains have been installed and the camshaft journal caps are secured into position.



    Hydraulic lifters
     
    Rocker arms.
     
    Camshafts. Align the sprocket timing marks.
     



    All camshaft journal caps except the thrust caps.
     
    Timing chains. Tighten the camshaft journal cap bolts in reverse of the loosening order and in several steps to 71-106 inch lbs. (8-12 Nm).
     
    Thrust caps. Tighten the bolts to 71-106 inch lbs. (8-12 Nm).
     
    Front cover
     
    Valve covers
     
    Wiring harness connector bracket
     
    Camshaft oil seal housing
     
    Water pump belt and drive pulley
     
    A/C compressor
     
    Alternator and bracket
     
    Oil pan
     
    Exhaust front pipe
     
    Ignition coil
     
    Spark plug wires
     
    IMRC actuator
     
    Power steering pump
     
    Accessory drive belt
     
    Intake manifold
     
    Negative battery cable
     

  4.  
  5. Fill the crankcase to the correct level.
  6.  
  7. Fill the cooling system.
  8.  
  9. Start the engine and check for leaks.
  10.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Drain the engine oil.
  6.  
  7. Remove or disconnect the following:
    NOTE
    Keep all valvetrain components in order for assembly


    NOTE
    Remove the camshaft thrust bearing caps before loosening any of the other bearing cap bolts.



    Negative battery cable
     
    Intake manifold
     
    Accessory drive belt
     
    Power steering pump
     
    Intake Manifold Runner Control (IMRC) actuator
     
    Spark plug wires
     
    Ignition coil
     
    Exhaust front pipe
     
    Oil pan
     
    Alternator and bracket
     
    A/C compressor
     
    Water pump belt and drive pulley
     
    Camshaft oil seal housing
     
    Wiring harness connector bracket
     
    Valve covers
     
    Front cover
     
    Timing chains
     



    Camshaft thrust bearing caps. Loosen the bolts evenly in several passes.
     
    Remaining camshaft bearing caps. Loosen the bolts evenly in several passes.
     
    Camshafts
     
    Rocker arms
     
    Hydraulic lifters

    Click image to see an enlarged view

    Fig. Right bank camshaft thrust cap loosening sequence-2.5L engine



    Click image to see an enlarged view

    Fig. Left bank camshaft thrust cap loosening sequence-2.5L engine



    Click image to see an enlarged view

    Fig. Right bank camshaft bearing cap loosening sequence-2.5L engine



    Click image to see an enlarged view

    Fig. Left bank camshaft bearing cap loosening sequence-2.5L engine

     

  8.  

To install:


WARNING
The crankshaft keyway must be at the 11 o'clock position before reassembly. Failure to do so may lead to engine damage.

  1. Rotate the crankshaft so that the keyway is at the 11 o'clock position for installation of the camshafts.
  2.  
  3. Install or connect the following:
    NOTE
    Do not install the camshaft journal thrust caps until the rocker arms and timing chains have been installed and the camshaft journal caps are secured into position.



    Hydraulic lifters
     
    Rocker arms.
     
    Camshafts. Align the sprocket timing marks.
     



    All camshaft journal caps except the thrust caps.
     
    Timing chains. Tighten the camshaft journal cap bolts in reverse of the loosening order and in several steps to 71-106 inch lbs. (8-12 Nm).
     
    Thrust caps. Tighten the bolts to 71-106 inch lbs. (8-12 Nm).
     
    Front cover
     
    Valve covers
     
    Wiring harness connector bracket
     
    Camshaft oil seal housing
     
    Water pump belt and drive pulley
     
    A/C compressor
     
    Alternator and bracket
     
    Oil pan
     
    Exhaust front pipe
     
    Ignition coil
     
    Spark plug wires
     
    IMRC actuator
     
    Power steering pump
     
    Accessory drive belt
     
    Intake manifold
     
    Negative battery cable
     

  4.  
  5. Fill the crankcase to the correct level.
  6.  
  7. Fill the cooling system.
  8.  
  9. Start the engine and check for leaks.
  10.  

3.0L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Drain the engine oil.
  6.  
  7. Relieve the fuel system pressure.
  8.  
  9. Remove or disconnect the following:

    Accessory drive belt
     
    Water pump and drive pulley
     
    Timing chains
     
    No.3 engine mount rubber and joint bracket
     
    Ventilation pipe
     
    Water bypass tube
     
    Camshafts
     

  10.  


NOTE
Remove the Nos. 1 and 5 caps first. Don-t loosen any other cap bolts until these caps are removed.



Rocker arms
 

To install:

  1. Installation is the reverse of removal. Observe the following torques:
  2.  
  3. Install the camshaft caps. Tighten the bolts in sequence to 71-106 inch lbs.
  4.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Accessory drive belts
     
    Front cover
     
    Timing belt. Refer to the Timing Belt unit repair section.
     
    Distributor
     
    Distributor spacer
     
    Valve covers
     
    Rocker arms and shafts
     
    Camshaft sprockets
     
    Camshaft seal plates and seals
     
    Camshaft thrust plates
     
    Camshafts
     

  4.  

To install:

  1. Install or connect the following:

    Camshafts
     
    Camshaft thrust plates. Tighten the bolts to 70-95 inch lbs. (8-11 Nm).
     
    Camshaft seal plates and seals. Tighten the bolts to 70-95 inch lbs. (8-11 Nm).
     
    Camshaft sprockets. Tighten the bolts to 52-59 ft. lbs. (71-80 Nm).
     
    Rocker arms and shafts
     
    Valve covers
     
    Distributor spacer
     
    Distributor
     
    Timing belt
     
    Front cover
     
    Accessory drive belts
     
    Negative battery cable
     

  2.  
  3. Start the engine and check for leaks.

    Click image to see an enlarged view

    Fig. Exploded view of cylinder head components-3.0L engine

  4.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Drain the engine oil.
  6.  
  7. Relieve the fuel system pressure.
  8.  
  9. Remove or disconnect the following:
    NOTE
    Remove the Nos. 1 and 5 caps first. Don-t loosen any other cap bolts until these caps are removed.



    Accessory drive belt
     
    Water pump and drive pulley
     
    Timing chains
     
    No.3 engine mount rubber and joint bracket
     
    Ventilation pipe
     
    Water bypass tube
     
    Camshafts
     



    Rocker arms

    Click image to see an enlarged view

    Fig. Right bank camshaft bearing and thrust cap loosening sequence-3.0L engine



    Click image to see an enlarged view

    Fig. Left bank camshaft bearing and thrust cap loosening sequence-3.0L engine

     

  10.  

To install:

  1. Installation is the reverse of removal. Observe the following torques:
  2.  
  3. Install the camshaft caps. Tighten the bolts in sequence to 71-106 inch lbs. (8-12 Nm)

    Click image to see an enlarged view

    Fig. Right bank camshaft bearing and thrust cap torque sequence-3.0L engine



    Click image to see an enlarged view

    Fig. Left bank camshaft bearing and thrust cap torque sequence-3.0L engine

  4.  

 
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