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    Mazda MPV 1999-06

    Timing Chain Cover, Chain, Sprockets, & Seal

    Print

    Removal & Installation



    2.5L Engine
    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:

      Negative battery cable
       
      Intake manifold
       
      Accessory drive belt
       
      Intake Manifold Runner Control (IMRC) actuator
       
      Spark plug wires
       
      Ignition coil
       
      Exhaust front pipe
       
      Oil pan
       
      Alternator and bracket
       
      A/C compressor
       
      Wiring harness connector bracket
       
      Water pump drive belt and pulley
       
      Camshaft oil seal housing
       
      Valve covers
       
      Right motor mount and bracket
       
      Crankshaft pulley
       
      Front crankshaft seal
       
      Front cover. Loosen the bolts in the sequence shown.

      Click image to see an enlarged view

      Fig. Front cover bolt removal sequence-2.5L engine

       



      Crankshaft Position (CKP) sensor pulse wheel
       

    8.  
    9. Rotate the crankshaft so that the keyway is at the 11 o'clock position to locate the crankshaft at TDC for No. 1 cylinder.
    10.  
    11. Verify that the alignment arrows on the camshafts are aligned. If not, rotate the crankshaft 1 complete revolution and recheck.

      Click image to see an enlarged view

      Fig. Camshaft alignment with the crankshaft in the 11 o-clock position-2.5L engine

    12.  
    13. Rotate the crankshaft so that the keyway is at the 3 o'clock position. This positions the right cylinder head camshafts to the neutral position.
      NOTE
      Keep all valvetrain components in order for assembly.

    14.  
    15. Remove or disconnect the following:

      Right timing chain tensioner
       
      Right timing chain tensioner arm
       
      Right timing chain and crankshaft timing sprocket
       
      Right bank camshafts
       

    16.  
    17. Rotate the crankshaft 1 and 2 / 3 turns and set the crankshaft keyway at the 11 o-clock position. This places the left bank camshafts in the neutral position.
    18.  
    19. Remove or disconnect the following:

      Left timing chain tensioner
       
      Left timing chain tensioner arm
       
      Left timing chain and crankshaft timing sprocket
       

    20.  

    To install:

    1. Prepare the timing chain tensioners for installation as follows:
      1. Place the left chain tensioner in a vise.
      2.  
      3. Using a small prytool, release and hold the timing chain tensioner ratchet/pawl mechanism through the access hole in the timing chain tensioner.

        Click image to see an enlarged view

        Fig. Using a thin prytool, release and hold the timing chain tensioner ratchet/pawl mechanism-2.5L engine

      4.  
      5. Slowly compress the tensioner.
      6.  
      7. Lock the piston with a 1.5mm wire or paperclip.
      8.  
      9. Repeat for the right chain tensioner.
        NOTE
        Be sure that the crankshaft keyway is still at the 11 o'clock position.



        Click image to see an enlarged view

        Fig. Left bank timing chain alignment-2.5L engine

      10.  

    2.  
    3. Install or connect the following:

      Left timing chain and crankshaft sprocket. Align the colored links with the index marks on the camshaft and crankshaft sprockets.
       
      Left timing chain tensioner arm
       
      Left timing chain tensioner. Tighten the retaining bolts to 15-22 ft. lbs. (20-30 Nm).
       

    4.  
    5. Remove the left timing chain tensioner retaining wire.
    6.  
    7. Rotate the crankshaft so that the keyway is at the 3 o'clock position.
    8.  
    9. Install the right bank camshafts with the exhaust camshaft index mark at 12 o-clock and the intake camshaft index mark at 3 o-clock as shown.

      Click image to see an enlarged view

      Fig. Right bank camshaft positioning-2.5L engine



      Click image to see an enlarged view

      Fig. Right bank timing chain alignment-2.5L engine

    10.  
    11. Install or connect the following:

      Right timing chain and crankshaft sprocket. Align the colored links with the index marks on the camshaft and crankshaft sprockets.
       
      Right timing chain tensioner arm
       
      Right timing chain tensioner. Tighten the retaining bolts to 15-22 ft. lbs. (20-30 Nm).
       

    12.  
    13. Remove the right timing chain tensioner retaining wire.
    14.  
    15. Install or connect the following:

      CKP sensor pulse wheel
       
      Front cover. Tighten the bolts in the reverse of the loosening sequence to 15-22 ft. lbs. (20-30 Nm).
       
      Front crankshaft seal
       
      Crankshaft pulley
       

    16.  
    17. Tighten the crankshaft pulley bolt as follows:
      1. Step 1: 88 ft. lbs. (120 Nm)
      2.  
      3. Step 2: Loosen the bolt one turn
      4.  
      5. Step 3: 35-39 ft. lbs. (47-53 Nm)
      6.  
      7. Step 4: Plus 85-95 degrees
      8.  

    18.  
    19. Install or connect the following:

      Right motor mount and bracket
       
      Valve covers
       
      Camshaft oil seal housing
       
      Water pump drive belt and pulley
       
      Wiring harness connector bracket
       
      A/C compressor
       
      Alternator and bracket
       
      Oil pan
       
      Exhaust front pipe
       
      Ignition coil
       
      Spark plug wires
       
      IMRC actuator
       
      Accessory drive belt
       
      Intake manifold
       
      Negative battery cable
       

    20.  
    21. Fill the crankcase to the correct level.
    22.  
    23. Start the engine and check for leaks.
    24.  

    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
       
      Intake Manifold Runner Control (IMRC) actuator
       
      Spark plug wires
       
      Ignition coil
       
      Exhaust front pipe
       
      Oil pan
       
      Alternator and bracket
       
      A/C compressor
       
      Wiring harness connector bracket
       
      Water pump drive belt and pulley
       
      Camshaft oil seal housing
       
      Valve covers
       
      Right motor mount and bracket
       
      Crankshaft pulley
       
      Front crankshaft seal
       
      Front cover. Loosen the bolts in the sequence shown.

      Click image to see an enlarged view

      Fig. Front cover bolt removal sequence-2.5L engine

       



      Crankshaft Position (CKP) sensor pulse wheel
       

    8.  
    9. Rotate the crankshaft so that the keyway is at the 11 o'clock position to locate the crankshaft at TDC for No. 1 cylinder.
    10.  
    11. Verify that the alignment arrows on the camshafts are aligned. If not, rotate the crankshaft 1 complete revolution and recheck.

      Click image to see an enlarged view

      Fig. Camshaft alignment with the crankshaft in the 11 o-clock position-2.5L engine

    12.  
    13. Rotate the crankshaft so that the keyway is at the 3 o'clock position. This positions the right cylinder head camshafts to the neutral position.
      NOTE
      Keep all valvetrain components in order for assembly.

    14.  
    15. Remove or disconnect the following:

      Right timing chain tensioner
       
      Right timing chain tensioner arm
       
      Right timing chain and crankshaft timing sprocket
       
      Right bank camshafts
       

    16.  
    17. Rotate the crankshaft 1 and 2 / 3 turns and set the crankshaft keyway at the 11 o-clock position. This places the left bank camshafts in the neutral position.
    18.  
    19. Remove or disconnect the following:

      Left timing chain tensioner
       
      Left timing chain tensioner arm
       
      Left timing chain and crankshaft timing sprocket
       

    20.  

    To install:

    1. Prepare the timing chain tensioners for installation as follows:
      1. Place the left chain tensioner in a vise.
      2.  
      3. Using a small prytool, release and hold the timing chain tensioner ratchet/pawl mechanism through the access hole in the timing chain tensioner.

        Click image to see an enlarged view

        Fig. Using a thin prytool, release and hold the timing chain tensioner ratchet/pawl mechanism-2.5L engine

      4.  
      5. Slowly compress the tensioner.
      6.  
      7. Lock the piston with a 1.5mm wire or paperclip.
      8.  
      9. Repeat for the right chain tensioner.
        NOTE
        Be sure that the crankshaft keyway is still at the 11 o'clock position.



        Click image to see an enlarged view

        Fig. Left bank timing chain alignment-2.5L engine

      10.  

    2.  
    3. Install or connect the following:

      Left timing chain and crankshaft sprocket. Align the colored links with the index marks on the camshaft and crankshaft sprockets.
       
      Left timing chain tensioner arm
       
      Left timing chain tensioner. Tighten the retaining bolts to 15-22 ft. lbs. (20-30 Nm).
       

    4.  
    5. Remove the left timing chain tensioner retaining wire.
    6.  
    7. Rotate the crankshaft so that the keyway is at the 3 o'clock position.
    8.  
    9. Install the right bank camshafts with the exhaust camshaft index mark at 12 o-clock and the intake camshaft index mark at 3 o-clock as shown.

      Click image to see an enlarged view

      Fig. Right bank camshaft positioning-2.5L engine



      Click image to see an enlarged view

      Fig. Right bank timing chain alignment-2.5L engine

    10.  
    11. Install or connect the following:

      Right timing chain and crankshaft sprocket. Align the colored links with the index marks on the camshaft and crankshaft sprockets.
       
      Right timing chain tensioner arm
       
      Right timing chain tensioner. Tighten the retaining bolts to 15-22 ft. lbs. (20-30 Nm).
       

    12.  
    13. Remove the right timing chain tensioner retaining wire.
    14.  
    15. Install or connect the following:

      CKP sensor pulse wheel
       
      Front cover. Tighten the bolts in the reverse of the loosening sequence to 15-22 ft. lbs. (20-30 Nm).
       
      Front crankshaft seal
       
      Crankshaft pulley
       

    16.  
    17. Tighten the crankshaft pulley bolt as follows:
      1. Step 1: 88 ft. lbs. (120 Nm)
      2.  
      3. Step 2: Loosen the bolt one turn
      4.  
      5. Step 3: 35-39 ft. lbs. (47-53 Nm)
      6.  
      7. Step 4: Plus 85-95 degrees
      8.  

    18.  
    19. Install or connect the following:

      Right motor mount and bracket
       
      Valve covers
       
      Camshaft oil seal housing
       
      Water pump drive belt and pulley
       
      Wiring harness connector bracket
       
      A/C compressor
       
      Alternator and bracket
       
      Oil pan
       
      Exhaust front pipe
       
      Ignition coil
       
      Spark plug wires
       
      IMRC actuator
       
      Accessory drive belt
       
      Intake manifold
       
      Negative battery cable
       

    20.  
    21. Fill the crankcase to the correct level.
    22.  
    23. Start the engine and check for leaks.
    24.  

    3.0L 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
       
      Intake Manifold Runner Control (IMRC) actuator
       
      Spark plug wires
       
      Ignition coil
       
      Exhaust front pipe
       
      Oil pan
       
      Alternator and bracket
       
      A/C compressor
       
      Wiring harness connector bracket
       
      Water pump drive belt and pulley
       
      Camshaft oil seal housing
       
      Valve covers
       
      Right motor mount and bracket
       
      Crankshaft pulley
       
      Front crankshaft seal
       
      Front cover. Loosen the bolts in the sequence shown.

      Click image to see an enlarged view

      Fig. Front cover bolt removal sequence-3.0L engine

       



      Crankshaft Position (CKP) sensor pulse wheel
       

    8.  
    9. Rotate the crankshaft so that the keyway is at the 11 o'clock position to locate the crankshaft at TDC for No. 1 cylinder.
    10.  
    11. Verify that the alignment arrows on the camshafts are aligned. If not, rotate the crankshaft 1 complete revolution and recheck.

      Click image to see an enlarged view

      Fig. Camshaft alignment with the crankshaft in the 11 o-clock position-3.0L engine

    12.  
    13. Rotate the crankshaft so that the keyway is at the 3 o'clock position. This positions the right cylinder head camshafts to the neutral position.
      NOTE
      Keep all valvetrain components in order for assembly.

    14.  
    15. Remove or disconnect the following:

      Right timing chain tensioner
       
      Right timing chain tensioner arm
       
      Right timing chain and crankshaft timing sprocket
       
      Right bank camshafts
       

    16.  
    17. Rotate the crankshaft 1 and 2 / 3 turns and set the crankshaft keyway at the 11 o-clock position. This places the left bank camshafts in the neutral position.
    18.  
    19. Remove or disconnect the following:

      Left timing chain tensioner
       
      Left timing chain tensioner arm
       
      Left timing chain and crankshaft timing sprocket
       

    20.  

    To install:

    1. Prepare the timing chain tensioners for installation as follows:
      1. Place the left chain tensioner in a vise.
      2.  
      3. Using a small prytool, release and hold the timing chain tensioner ratchet/pawl mechanism through the access hole in the timing chain tensioner.

        Click image to see an enlarged view

        Fig. Using a thin prytool, release and hold the timing chain tensioner ratchet/pawl mechanism-3.0L engine

      4.  
      5. Slowly compress the tensioner.
      6.  
      7. Lock the piston with a 1.5mm wire or paperclip.
      8.  
      9. Repeat for the right chain tensioner.
        NOTE
        Be sure that the crankshaft keyway is still at the 11 o'clock position.



        Click image to see an enlarged view

        Fig. Left bank timing chain alignment-3.0L engine

      10.  

    2.  
    3. Install or connect the following:

      Left timing chain and crankshaft sprocket. Align the colored links with the index marks on the camshaft and crankshaft sprockets.
       
      Left timing chain tensioner arm
       
      Left timing chain tensioner. Tighten the retaining bolts to 15-22 ft. lbs. (20-30 Nm).
       

    4.  
    5. Remove the left timing chain tensioner retaining wire.
    6.  
    7. Rotate the crankshaft so that the keyway is at the 3 o'clock position.
    8.  
    9. Install the right bank camshafts with the exhaust camshaft index mark at 12 o-clock and the intake camshaft index mark at 3 o-clock as shown.

      Click image to see an enlarged view

      Fig. Right bank camshaft positioning-3.0L engine



      Click image to see an enlarged view

      Fig. Right bank timing chain alignment-3.0L engine

    10.  
    11. Install or connect the following:

      Right timing chain and crankshaft sprocket. Align the colored links with the index marks on the camshaft and crankshaft sprockets.
       
      Right timing chain tensioner arm
       
      Right timing chain tensioner. Tighten the retaining bolts to 15-22 ft. lbs. (20-30 Nm).
       

    12.  
    13. Remove the right timing chain tensioner retaining wire.
    14.  
    15. Install or connect the following:

      CKP sensor pulse wheel
       
      Front cover. Tighten the bolts in the reverse of the loosening sequence to 15-22 ft. lbs. (20-30 Nm).
       
      Front crankshaft seal
       
      Crankshaft pulley
       

    16.  
    17. Tighten the crankshaft pulley bolt as follows:
      1. Step 1: 88 ft. lbs. (120 Nm).
      2.  
      3. Step 2: Loosen the bolt one turn.
      4.  
      5. Step 3: 35-39 ft. lbs. (47-53 Nm).
      6.  
      7. Step 4: Plus 85-95 degrees.
      8.  

    18.  
    19. Install or connect the following:

      Right motor mount and bracket
       
      Valve covers
       
      Camshaft oil seal housing
       
      Water pump drive belt and pulley
       
      Wiring harness connector bracket
       
      A/C compressor
       
      Alternator and bracket
       
      Oil pan
       
      Exhaust front pipe
       
      Ignition coil
       
      Spark plug wires
       
      IMRC actuator
       
      Accessory drive belt
       
      Intake manifold
       
      Negative battery cable
       

    20.  
    21. Fill the crankcase to the correct level.
    22.  
    23. Start the engine and check for leaks.
    24.  

     
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