Nissan Quest 2001-02 and 2004-06

Timing Chain Cover, Chain, Sprockets & Rear Case 2

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Removal & Installation



3.5L Engine
4-Speed
  1. Install the internal chain guide. Tighten the bolts to 72 inch lbs. (8 Nm).
  2.  
  3. Install the slack guide and tighten to 12 ft. lbs. (15 Nm). Do not over-tighten the slack guide installation bolt. It is normal for a gap to exist under the bolt seats when the bolt is tightened to specification.
  4.  
  5. Install the timing chain tensioner for the slack guide as follows:
    1. When installing the chain tensioner, push in the sleeve and keep it pressed in with the stopper pin.
    2.  
    3. Remove any dirt and foreign materials completely from the back and the mounting surfaces of the chain tensioner.
    4.  
    5. Tighten the bolts to 72 inch lbs. (8 Nm).
    6.  
    7. After installation, pull out the stopper pin by pressing the slack guide.
    8.  

  6.  
  7. Confirm that the match marks on the sprockets and the timing chain have not slipped out of alignment.
  8.  
  9. Install new O-rings on the rear timing chain case.
  10.  
  11. Install the front oil seal on the front timing chain case using a suitable tool. Apply clean engine oil to the oil seal edges.- Install the seal so that each seal lip is oriented as illustrated. Using a suitable drift, press-fit oil seal until it becomes flush with timing chain case end face. Make sure the garter spring in the oil seal is in position and seal lip is not inverted.
  12.  
  13. Install the front timing cover case.
  14.  
  15. Install IVT control valve covers as follows:
    1. Install new collared O-rings in front cover oil hole on both sides.
    2.  
    3. Install new seal rings on the IVT control covers.
    4.  
    5. Apply a 0.083-0.122 inch (2.1-3.1mm) bead of RTV sealant to the IVT control covers as illustrated.
    6.  

  16.  
  17. Being careful not to move the seal ring from the installation groove, align the dowel pins on the chain case with the holes to install the IVT control covers.
  18.  
  19. Tighten the intake valve timing control cover bolts in the order illustrated to 100 inch lbs. (11 Nm).
  20.  
  21. Apply a 0.091-0.130 inch (2.3-3.3mm) bead of liquid gasket to the water pump cover and the chain tensioner cover and install covers. Tighten the bolts on the pump and cover to 97 inch lbs. (11 Nm).
  22.  
  23. Install crankshaft pulley lubricate the pulley bolt with clean engine oil and tighten the bolt in two steps:
    1. Step 1: 32 ft. lbs. (44 Nm).
    2.  
    3. Step 2: 60-65 degrees clockwise.
    4.  

  24.  
  25. Rotate crankshaft pulley in a clockwise direction as viewed from front of the engine to confirm it turns smoothly.
  26.  
  27. Install the right hand engine mount.
  28.  
  29. Install the rocker covers in the reverse order of removal, make sure to perform the following:
  30.  
  31. Apply sealant to the areas on the front corners.
  32.  
  33. Tighten the rocker cover bolts in two steps in the sequence illustrated:
    1. Step 1: 17 inch lbs. (1.96 Nm).
    2.  
    3. Step 2: 74 inch lbs. (8 Nm).
    4.  

  34.  
  35. Install the remaining components is in reverse order of removal.
  36.  


    Click image to see an enlarged view

    Fig. It is normal for a gap to exist under the bolt seats when the internal chain guide bolt is tightened -3.5L engine



    Click image to see an enlarged view

    Fig. Tighten the front timing chain case bolts in the order shown-3.5L engine



NOTE
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in the guide may generate a pounding noise during and just after engine start. This is normal. Noise will stop after hydraulic pressure rises.



Click image to see an enlarged view

Fig. Apply a 0.083-0.122 inch (2.1-3.1mm) bead of RTV sealant to the IVT control covers-3.5L engine



Click image to see an enlarged view

Fig. Tighten the intake valve timing control cover bolts in this order-3.5L engine



Click image to see an enlarged view

Fig. Apply a 0.091-0.130 inch (2.3-3.3mm) bead of liquid gasket to the water pump cover and the chain tensioner cover-3.5L engine



Click image to see an enlarged view

Fig. Tighten the rocker cover bolts in this sequence-3.5L engine

  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Disconnect the battery cables.
  4.  
  5. Drain the engine oil and coolant.
  6.  
  7. Remove the engine cover.
  8.  
  9. Remove the upper air cleaner case, Mass Air Flow (MAF) sensor and air cleaner to electric throttle control actuator tube.
  10.  
  11. Remove the battery and tray.
  12.  
  13. Disconnect the heater pump and position aside.
  14.  
  15. Remove the cowl top and cowl top extension.
  16.  
  17. Disconnect the engine room harness from the Powertrain Control Module (PCM) and the two connections at the right hand strut tower.
  18.  
  19. Disconnect the engine harness ground connections.
  20.  
  21. Remove the radiator assembly, coolant reservoir, and all system hoses.
  22.  
  23. Remove the idler pulley and bracket.
  24.  
  25. Remove the upper and lower oil pans.
  26.  
  27. Remove the alternator.
  28.  
  29. Disconnect the engine harness and position it aside.
  30.  
  31. Support the engine using a suitable support device and remove the right hand engine mount insulator, mount and bracket.
  32.  
  33. Remove the timing chain tensioner cover.
  34.  
  35. Remove both the IVT control covers, remove the bolts in the sequence illustrated.
    NOTE
    The shaft in the cover is inserted into the center hole of the intake camshaft sprocket. Remove the cover by pulling straight out until the cover disengages from the camshaft sprocket.



    Click image to see an enlarged view

    Fig. Loosen the IVT control cover bolts in this sequence-3.5L engine

  36.  
  37. Remove the starter.
  38.  
  39. Remove the intake manifold collector.
  40.  
  41. Remove the valve covers as follows:
    1. Remove the engine cover.
    2.  
    3. Remove side engine covers.
    4.  

  42.  
  43. If removing right hand valve cover, remove the following:

    Front cowl panel
     
    Windshield wiper arms and motor assembly
     
    Intake manifold collector.
     

    1. If removing left hand valve cover, disconnect the Air Fuel Ratio (AFR) sensor.
    2.  
    3. Remove the ignition coils.
    4.  
    5. Position engine harness aside.
    6.  
    7. Disconnect Positive Crankcase Ventilation (PCV) hose.
    8.  
    9. Remove the dipstick.
    10.  
    11. Remove the valve cover bolts in the sequence illustrated.

      Click image to see an enlarged view

      Fig. Loosen the valve cover bolts in this sequence-3.5L engine

    12.  

  44.  
  45. Remove the spark plugs.
  46.  
  47. Disconnect and remove the IVT control solenoid valves and discard the gaskets
  48.  
  49. Place the engine at Top Dead center (TDC) of No. 1 cylinder as follows:
    1. Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with the timing indicator.
    2.  
    3. Check that intake and exhaust camshaft lobes on No. 1 cylinder (right bank of engine) are located as illustrated. If not, turn the crankshaft one revolution (360-) and align as illustrated.

      Click image to see an enlarged view

      Fig. Remove the IVT control solenoid valves-3.5L engine



      Click image to see an enlarged view

      Fig. Position the engine at Top Dead Center (TDC) of No. 1 cylinder-3.5L engine



      Click image to see an enlarged view

      Fig. Check that intake and exhaust camshaft lobes on No. 1 cylinder on the right bank of engine are located as shown-3.5L engine

    4.  

  50.  
  51. Lock the ring gear using tool J-44716 attached to the starter bolt hole.
    CAUTION
    Do not damage the ring gear teeth, or the signal plate teeth behind the ring gear, when setting the tool.

  52.  
  53. Remove the crankshaft pulley as follows:
    1. Loosen crankshaft pulley bolt using tool KV10109300 and locate bolt seating surface at 0.39 inch (10 mm) from its original position.
    2.  
    3. Position a pulley puller at recess hole of the crankshaft pulley to remove the crankshaft pulley.
      CAUTION
      Do not use a puller claw on the crankshaft pulley.



      Click image to see an enlarged view

      Fig. Lock the ring gear using tool J-44716 attached to the starter bolt hole-3.5L engine



      Click image to see an enlarged view

      Fig. Loosen crankshaft pulley bolt using tool KV10109300 and locate bolt seating surface at 0.39 inch (10mm) from its original position-3.5L engine

    4.  

  54.  
  55. Remove the front timing chain case after loosening the front timing chain case bolts in the order illustrated.

    Click image to see an enlarged view

    Fig. Loosen the front timing chain case bolts in this order-3.5L engine



    Click image to see an enlarged view

    Fig. Insert the appropriate size tool such as J-37228 into the notch at the top of the front timing chain case-3.5L engine

  56.  
  57. Remove the internal chain guide.

    Click image to see an enlarged view

    Fig. Location of the internal chain guide-3.5L engine

  58.  
  59. Remove the timing chain tensioner and slack guide as follows:
    1. Put matchmarks on the timing chain and sprockets to indicate the correct position of the components to aid during installation.
    2.  
    3. Pull the lever down and release the plunger stopper tab. The plunger stopper tab can be pushed up to release (coaxial structure with lever).
    4.  
    5. Insert a 0.098 inch (2.5mm) Allen wrench into the tensioner body hole to hold the lever, and keep the tab released.

      Click image to see an enlarged view

      Fig. Insert a 0.098 inch (2.5mm) Allen wrench into the tensioner body hole to hold the chain tensioner lever-3.5L engine

    6.  
    7. Insert the plunger into tensioner body by pressing the slack side chain guide.
    8.  
    9. Keep the slack side chain guide pressed and hold it by pushing a stopper pin such as a 0.098 inch (2.5mm) Allen wrench through the lever hole and body hole.
    10.  
    11. Remove the timing chain tensioner bolts and the timing chain tensioner.
    12.  
    13. Remove the slack guide bolt and the guide.
    14.  

  60.  
  61. Remove primary timing chain and crankshaft sprocket.
    CAUTION
    After removing timing chain, do not turn the crankshaft and camshaft separately, or the valves will strike the pistons.



    Click image to see an enlarged view

    Fig. Keep the slack side chain guide pressed and hold it by pushing a stopper pin-3.5L engine



    Click image to see an enlarged view

    Fig. Attach a suitable stopper pin such as a 0.098 inch (2.5mm) Allen wrench to the right and left camshaft chain tensioners-3.5L engine

  62.  
  63. Attach a suitable stopper pin such as a 0.098 inch (2.5mm) Allen wrench to the right and left camshaft chain tensioners, for secondary timing chains.
  64.  
  65. Remove the intake and exhaust camshaft sprocket bolts. Put matchmarks on the timing chain and camshaft sprockets to aid alignment during installation.
  66.  
  67. Use a wrench on the hexagonal portion of the camshaft and loosen the bolts as illustrated.

    Click image to see an enlarged view

    Fig. Insert a 0.020 inch (0.5 mm) metal or resin plate into the guide between timing chain and chain tensioner plunger-3.5L engine

  68.  
  69. Remove the secondary timing chains with camshaft sprockets as follows:
    1. Rotate camshaft slightly, and slacken timing chain of timing chain tensioner side.
    2.  
    3. Insert a 0.020 inch (0.5 mm) metal or resin plate into the guide between timing chain and chain tensioner plunger.
    4.  

  70.  
  71. Remove the camshaft sprocket and secondary timing chain with the timing chain removed from guide groove.
    NOTE
    The intake camshaft sprocket is two-for-one structure of primary and secondary sprockets. Handle the intake sprockets as an assembly.


    CAUTION
    The chain tensioner plunger can move while stopper pin is inserted in tensioner. The plunger can come out of tensioner when timing chain is removed. Use caution during removal.


    NOTE
    Do not disassemble the intake sprockets (never loosen bolts A and B shown in the accompanying illustration).

  72.  
  73. Remove the timing chain tension guide.
  74.  
  75. Remove the rear timing chain case as follows:
    CAUTION
    Do not remove the plate metal cover for the oil passage. After removing the chain case, do not apply any load to the case that might bend it.

    1. Loosen and remove the rear timing chain case bolts in the order illustrated.
    2.  
    3. Cut the sealant using tool J-37228 and remove the rear timing chain case.

      Click image to see an enlarged view

      Fig. Do not disassemble the intake sprockets (never loosen bolts A and B)-3.5L engine



      Click image to see an enlarged view

      Fig. Remove the rear timing chain case bolts in the order illustrated-3.5L engine

    4.  

  76.  
  77. Disconnect the inlet coolant hose.
  78.  
  79. Remove the inlet coolant housing, gasket and thermostat.
  80.  
  81. Remove O-rings on the cylinder head and cylinder block.
  82.  
  83. Loosen the No. 1 camshaft bracket bolts in several steps in the sequence illustrated and remove No. 1 camshaft brackets.
  84.  
  85. Remove the camshaft chain tensioners, for secondary timing chains.
  86.  
  87. If necessary, remove the water pump.
  88.  
  89. Use a scraper to remove all of the old sealant from the front and rear timing chain case mating surfaces and the bolt holes, bolts, camshaft No. 1 bracket and water pump cover. Being careful not to damage the mating surfaces.
  90.  
  91. Remove the front oil seal from the front timing chain case using a suitable tool.

    Click image to see an enlarged view

    Fig. Loosen the No. 1 camshaft bracket bolts in several steps in the sequence illustrated-3.5L engine



    Click image to see an enlarged view

    Fig. Remove the front oil seal from the front timing chain case using a suitable tool-3.5L engine

  92.  
  93. Check for cracks and any excessive wear at the roller links of the timing chain. Replace the timing chain as necessary.
  94.  

To install:

Click image to see an enlarged view

Fig. Make sure all timing marks are aligned as shown when the chain is installed-3.5L engine

 
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