Nissan Quest 2001-02 and 2004-06

Timing Chain Cover, Chain, Sprockets & Rear Case 6

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Removal & Installation



3.5L Engine
5-Speed Models
  1. Install the camshaft chain tensioners, for secondary timing chain Tighten the bolts to 75 inch lbs. (9 Nm).
  2.  
  3. Before installing the No. 1 camshaft bracket, apply sealant to mating surface and wipe off any excess sealant before installation.
  4.  
  5. Tighten the No. 1 camshaft bracket in three steps, in the order illustrated as follows:
  6.  
  7. Step 1: 17 inch lbs. (2 Nm).
    1. Step 2: 52 inch lbs. (6 Nm).
    2.  
    3. Step 3: 92 inch lbs. (10 Nm).
    4.  

  8.  
  9. Install the thermostat, gasket and coolant inlet housing. Tighten the bolts to 87 inch lbs. (10 Nm).
  10.  
  11. Install rear timing chain case as follows:
    1. Install new O-rings on cylinder block.
    2.  
    3. Install new O-rings on cylinder head.
    4.  
    5. Install the water pump, if removed.

      Click image to see an enlarged view

      Fig. Before installing the No. 1 camshaft bracket, apply sealant to mating surface and wipe off any excess sealant-3.5L engine



      Click image to see an enlarged view

      Fig. Camshaft bolt tightening sequence-3.5L engine

    6.  

  12.  
  13. Apply silicone sealant to rear timing chain case as illustrated, clean off the protruding sealant prior to installation.

    Click image to see an enlarged view

    Fig. Apply silicone sealant to rear timing chain case as illustrated-3.5L engine

    1. Align the rear timing chain case with the dowel pins on the cylinder block and install the case. Make sure the O-rings stay in place during installation.
    2.  
    3. Tighten the rear timing chain case bolts in the order illustrated.
    4.  
    5. Install the 0.79 inch (20 mm) bolts in locations 1, 2, 3, 6, 7, 8, 9 and 10. Tighten to 9 ft. lbs. (13 Nm). Install the 0.63 inch (16 mm) bolts in locations 4, 5, 11 through 26 and tighten to 9 ft. lbs. (13 Nm).
    6.  
    7. After all the bolts are initially tightened, retighten them to the specification in the order illustrated.
    8.  
    9. After installing the rear timing chain case, check the surface height difference between the rear timing chain case to cylinder block. The measurement should be 0.0094-0.0055 inch (0.24-0.14 mm). If not within specification, repeat the cover installation procedure.

      Click image to see an enlarged view

      Fig. Rear timing chain case torque sequence-3.5L engine

    10.  

  14.  
  15. Install the timing chain tension guide. Tighten the bolts to 9 ft. lbs. (13 Nm).
  16.  
  17. Position the crankshaft so the No. 1 piston is set at TDC on the compression stroke.
  18.  
  19. Make sure that the dowel pin hole, dowel pin and crankshaft key are located as illustrated. The camshaft dowel pin hole (intake side): at cylinder head upper face side in each bank. The camshaft dowel pin (exhaust side): at cylinder head upper face side in each bank. The crankshaft key: at cylinder head side of right hand bank.
    CAUTION
    The hole on small diameter side must be used for the intake camshaft sprocket dowel pin. Do not misidentify (ignore the big diameter side).

  20.  
  21. Install the secondary timing chains and camshaft sprockets as follows:
    CAUTION
    Match marks between the timing chain and sprockets can slip easily. Check all match mark positions repeatedly during the installation process. Push the sleeve of the secondary chain tensioner and keep it pressed in with a stopper pin.



    Click image to see an enlarged view

    Fig. Make sure that the dowel pin hole, dowel pin and crankshaft key are located as illustrated-3.5L engine



    Click image to see an enlarged view

    Fig. Match marks for the intake sprocket are on the back side of the secondary sprocket. There are two types of match marks, round and oval types-3.5L engine

    1. Align the match marks on the secondary timing chain (gold link) with the ones on the intake and exhaust sprockets (stamped), and install them.
      NOTE
      Match marks for the intake sprocket are on the back side of the secondary sprocket. There are two types of match marks, round and oval types. They should be used for the right hand and left hand banks, respectively. The right hand banks use round type and the left hand bank use oval type.

    2.  
    3. Align the dowel pin and pin hole on the camshaft with the groove and dowel pin on the sprocket, and install them.
    4.  
    5. On the intake side, align the pin hole on the small diameter side of the camshaft front end with the dowel pin on the back side of the camshaft sprocket, and install them.
    6.  
    7. On the exhaust side, align the dowel pin on the camshaft front end with the pin groove on the camshaft sprocket, and install them.
    8.  
    9. Tighten the camshaft sprocket bolts by hand to prevent the dislocation of the dowel pins.
    10.  

  22.  
  23. Tighten the timing chain tension guide bolts to 16 ft. lbs. (21 Nm).
    NOTE
    It may be difficult to visually check the dislocation of mating marks during and after installation. To make the matching easier, make a mating mark on the sprocket teeth in advance with paint.

  24.  
  25. After confirming the mating marks are aligned, tighten the camshaft sprocket bolts to 76 ft. lbs. (102 Nm).
  26.  
  27. Remove the stopper pins out from the timing chain tensioners, on secondary timing chains.
  28.  
  29. Install the crankshaft sprocket on the crankshaft. Make sure the mating marks on the crankshaft sprocket face the front of the engine.

    Click image to see an enlarged view

    Fig. Make sure the mating marks on the crankshaft sprocket face the front of the engine-3.5L engine

  30.  
  31. Install the primary timing chain as follows:
    1. Install the primary timing chain so the mating mark (punched) on the camshaft sprocket is aligned with the copper link on the timing chain, while the mating mark (notched) on the crankshaft sprocket is aligned with the gold link on the timing chain, as illustrated.
      NOTE
      When it is difficult to align mating marks of the primary timing chain with each sprocket, gradually turn the camshaft using a wrench on the hexagonal portion to align it with the mating marks. During alignment, be careful to prevent dislocation of mating mark alignments of the secondary timing chains.



      Click image to see an enlarged view

      Fig. Install the primary timing chain so the match mark (punched) on the cam sprocket is aligned with the copper link on the timing chain, while the mating mark (notched) on the crank sprocket is aligned with the gold link on the timing chain-3.5L engine

    2.  

  32.  
  33. Install the internal chain guide. Tighten the bolts to 72 inch lbs. (8 Nm).
  34.  
  35. 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.

    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

  36.  
  37. 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.  

  38.  
  39. Confirm that the match marks on the sprockets and the timing chain have not slipped out of alignment.
  40.  
  41. Install new O-rings on the rear timing chain case.
  42.  
  43. 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.
  44.  
  45. Install the front timing cover case.
  46.  
  47. 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.

      Click image to see an enlarged view

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

    6.  

  48.  
  49. 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.
  50.  
  51. Tighten the intake valve timing control cover bolts in the order illustrated to 100 inch lbs. (11 Nm).
  52.  
  53. 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).
  54.  
  55. 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.  

  56.  
  57. Rotate crankshaft pulley in a clockwise direction as viewed from front of the engine to confirm it turns smoothly.
  58.  
  59. Install the valve covers in the reverse order of removal, make sure to perform the following:
  60.  
  61. Apply sealant to the areas on the front corners.
  62.  
  63. Tighten the valve 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.  

  64.  
  65. Install the remaining components is in reverse order of removal.
    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 valve cover bolts in this sequence-3.5L engine

  66.  

 
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