Toyota Tundra 2001-06

Camshaft, Bearings & Lifters 2

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Removal & Installation



3.4L Engine
  1. Install the left camshaft timing pulley, as follows:
    1. Install the knock pin to the camshaft.
    2.  
    3. Align the knock pin hose of the camshaft with the knock pin groove of the timing pulley.
    4.  
    5. Slide the timing pulley on the camshaft with the flange side facing outward. Tighten the pulley bolt to 81 ft. lbs. (110 Nm).
    6.  

  2.  
  3. Set the No. 1 cylinder to TDC of the compression stroke.
    1. Turn the crankshaft pulley and align its groove with the timing mark0
    2.  
    3. Turn the camshaft, align the knock pin hole of the camshaft with the timing mark of the No. 3 timing belt cover.
    4.  
    5. Turn the camshaft timing pulley, align the timing marks of the camshaft timing pulley and the No. 3 timing belt cover.
    6.  

  4.  
  5. Connect the timing belt to the left camshaft timing pulley, as follows:
    1. Check that the installation mark on the timing belt is aligned with the end of the No. 1 timing belt cover.
    2.  
    3. Using Variable Pin Wrench Set 09960-01000 or equivalent, slightly turn the left camshaft timing pulley clockwise. Align the installation mark on the timing belt with the timing mark of the camshaft timing pulley, and hang the timing belt on the left camshaft timing pulley.
    4.  
    5. Align the timing marks of the left camshaft pulley and the No. 3 timing belt cover.
    6.  
    7. Check that the timing belt has tension between the crankshaft timing pulley and the left camshaft timing pulley.
    8.  

  6.  
  7. Install the right camshaft timing pulley and the timing belt, as follows:
    1. Align the installation mark on the timing belt with the timing mark of the right camshaft timing pulley, and hang the timing belt on the right camshaft timing pulley with the flange side facing inward.
    2.  
    3. Slide the right camshaft timing pulley on the camshaft. Align the timing marks on the right camshaft timing pulley and the No. 3 timing belt cover.
    4.  
    5. Align the knock pin hole of the camshaft with the knock pin groove of the pulley.
    6.  
    7. Install the knock pin. Tighten the bolt to 81 ft. lbs. (110 Nm).
    8.  

  8.  
  9. Set the timing belt tensioner, as follows:
    1. Using a press, slowly press in the pushrod using 220-2,205 lbs. (981-9,807 N) of force.
    2.  
    3. Align the holes of the pushrod and housing, pass a 1.5mm hexagon wrench through the holes to keep the setting position of the pushrod.
    4.  
    5. Release the press and install the dust boot to the tensioner.
    6.  

  10.  
  11. Install the timing belt tensioner and alternately tighten the bolts to 20 ft. lbs. (28 Nm). Using pliers, remove the 1.5mm hexagon wrench from the belt tensioner.
  12.  
  13. Check the valve timing, as follows:
    1. Slowly turn the crankshaft pulley 2 revolutions from the TDC-to-TDC. Always turn the crankshaft pulley clockwise.
    2.  
    3. Check that each pulley aligns with the timing marks. If the timing marks do not align, remove the timing belt and reinstall it.
    4.  

  14.  
  15. Install or connect the following:

    Fan bracket with the bolt and nut
     
    Power steering adjusting strut with the nut
     
    No. 2 timing belt cover. Tighten the bolts to 80 inch lbs. (9 Nm).
     
    Negative battery cable
     

  16.  
  17. Fill the radiator with engine coolant.
  18.  
  19. Start the engine and check for leaks.
  20.  
  21. Check the ignition timing.
  22.  
  23. Install the engine undercover.
  24.  
  25. Road test the vehicle.
  26.  
  27. Recheck all fluid levels.
  28.  


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    Fig. Exploded view of the cylinder head component assembly-3.4L engine



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    Fig. Rear timing belt cover mounting bolt locations-3.4L engine



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    Fig. Aligning the timing marks (2 dot marks) of the right camshafts-3.4L engine



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    Fig. Drive gear service bolt (right side)-3.4L engine



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    Fig. Right exhaust camshaft bolts removal sequence-3.4L engine



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    Fig. Right intake camshaft bolts removal sequence-3.4L engine



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    Fig. Aligning the timing mark (1 dot mark) of the left camshafts-3.4L engine



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    Fig. Drive gear service bolt (left side)-3.4L engine



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    Fig. Left exhaust camshaft bolts removal sequence-3.4L engine



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    Fig. Left intake camshaft bolts removal sequence-3.4L engine



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    Fig. Right intake camshaft tightening sequence-3.4L engine



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    Fig. Aligning the right camshafts for installation-3.4L engine



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    Fig. Right exhaust camshaft bolts tightening sequence-3.4L engine



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    Fig. Left intake camshaft bolts tightening sequence-3.4L engine



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    Fig. Left exhaust camshaft bolts tightening sequence-3.4L engine



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    Fig. Exploded view of the cylinder head component assembly-3.4L engine




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Fig. Camshafts and related components-3.4L engine

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

    Negative battery cable
     
    Engine undercover
     

  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Air cleaner cap
     
    Mass Air Flow (MAF) meter and the resonator
     
    Actuator cable with the bracket, if equipped with cruise control
     
    Accelerator cable
     
    Throttle cable, if equipped with an automatic transmission
     
    Heater hose
     
    Upper radiator hose from the engine
     

  8.  
  9. Remove the power steering drive belt, as follows:
    1. Stretch the belt and loosen the fan pulley mounting nuts.
    2.  
    3. Loosen the lockbolt, pivot bolt and adjusting bolt and remove the drive belt from the engine.
    4.  

  10.  
  11. Remove or disconnect the following:

    Air conditioning drive belt, by loosening the idle pulley nut and adjusting bolt
     
    Loosen the alternator lockbolt, pivot bolt and adjusting bolt
     
    Alternator drive belt
     
    No. 2 fan shroud, by removing the 2 clips
     
    Fan with the fluid coupling and fan pulleys
     
    Power steering pump and move it aside without disconnecting the lines
     
    Compressor and move it aside without disconnecting the lines, if equipped with air conditioning
     
    Air conditioning bracket, if equipped with air conditioning
     
    Spark plug wires with the ignition coils
     
    Spark plugs
     
    Camshaft Position (CMP) sensor connector, from the No. 2 timing belt cover
     
    3 spark plug wire clamps from the No. 2 timing belt cover
     
    6 bolts and the timing belt cover
     
    Power steering adjusting strut by removing the nut
     
    Fan bracket by removing the bolt and nut
     

  12.  
  13. Set the No. 1 cylinder at Top Dead Center (TDC) of the compression stroke, as follows:
    1. Turn the crankshaft pulley and align its groove with the timing mark 0 on the No. 1 timing belt cover.
    2.  
    3. Check that the timing marks of the camshaft timing pulleys and the No. 3 timing belt cover are aligned. If not, turn the crankshaft pulley 1 revolution (360 degrees).
    4.  

  14.  
  15. Remove or disconnect the following:

    Timing belt tensioner, by alternately loosening the 2 bolts
     
    Pulley bolt, the timing pulley and the knock pin, using Variable Pin Wrench Set 09960-10010
     
    Both timing pulleys with the timing belt
     
    No. 2 idler pulley
     
    Alternator
     
    Positive Crankcase Ventilation PCV hoses
     
    Water bypass hoses
     
    Air assist hose from the intake air connector
     
    2 vacuum sensing hoses from the Vacuum Switching Valve (VSV)
     
    Evaporative Emissions (EVAP) hose
     
    Air hose from the power steering
     
    Air hose from the air conditioning idle up valve, if equipped with air conditioning
     
    4 bolts, 2 nuts and the air intake chamber assembly
     
    Intake air connector
     
    Camshaft Position (CMP) sensor
     
    No. 3 (rear) timing belt cover by removing the 6 bolts
     
    8 bolts, seal washers, both cylinder head cover and gaskets
     
    Semi-circular plugs
     

  16.  
  17. Remove the right exhaust camshafts, as follows:
    1. Bring the service bolt hole of the driven sub-gear upward by turning the hexagon head portion of the exhaust camshaft with a wrench.
    2.  
    3. Align the timing mark (2 dot marks) of the camshaft drive and driven gears by turning the camshaft with a wrench.
    4.  
    5. Secure the exhaust camshaft sub-gear to the driven gear with a service bolt (6mm diameter, 16-20mm bolt length and 1.0mm in thread pitch).
      NOTE
      When removing the camshaft, be sure the torsional spring force of the sub-gear has been eliminated by the above operation.

    6.  
    7. Uniformly loosen and remove the bearing cap bolts in several passes, in the sequence shown.
    8.  
    9. Remove the bearing caps and camshaft. Make a note of the bearing cap positions for proper installation.
      NOTE
      Do not pry on or attempt to force the camshaft with a tool or other object.

    10.  

  18.  
  19. Remove the right-hand intake camshaft, as follows:
    1. Uniformly loosen and remove the bearing cap bolts in several passes, in the sequence shown.
    2.  
    3. Remove the bearing caps, oil seal and camshaft. Make a note of the bearing cap positions for proper installation.
    4.  

  20.  
  21. Remove the left exhaust camshafts, as follows:
    1. Align the timing mark (1 dot mark) of the camshaft drive and driven gears by turning the camshaft with a wrench.
    2.  
    3. Secure the exhaust camshaft sub-gear to the driven gear with a service bolt (6mm diameter, 16-20mm bolt length and 1.0mm in thread pitch).
      NOTE
      When removing the camshaft, be sure that the torsional spring force of the sub-gear has been eliminated by the above operation.

    4.  
    5. Uniformly loosen and remove the bearing cap bolts in several passes, in the sequence shown.
    6.  
    7. Remove the bearing caps and camshaft. Make a note of the bearing cap positions for proper installation.
    8.  

  22.  
  23. Remove the left-hand intake camshaft, as follows:
    1. Uniformly loosen and remove the bearing cap bolts in several passes, in the sequence shown.
    2.  
    3. Remove the bearing caps, oil seal and camshaft. Make a note of the bearing cap positions for proper installation.
    4.  

  24.  
  25. Remove the valve lifters and shims from the cylinder head. Arrange the valve lifters and shims in correct order.
  26.  

To install:

 
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