Nissan Quest 2001-02 and 2004-06

Front Cover & Seal

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Removal & Installation



3.5L Engine


Click image to see an enlarged view

Fig. Exploded view of the timing chain, cover and related components-3.5L engine

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  


NOTE
This section describes procedures for removal/installation procedure of the front timing chain case and timing chain related parts without removing the upper oil pan from the vehicle. If the upper oil needs to be removed or installed, or when rear timing chain case is removed or installed, remove both oil pans first. Then remove front timing chain case and timing chain related parts.

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the engine cooling system and engine oil.
  4.  
  5. Remove the engine cover.
  6.  
  7. Remove the upper air cleaner case, Mass Air Flow (MAF) sensor and air cleaner-to-electric throttle control actuator tube.
  8.  
  9. Remove the engine coolant reservoir.
  10.  
  11. Remove the cowl top and cowl top extension.
  12.  
  13. Remove the IPDM E/R and position aside. Remove the bracket.
  14.  
  15. Remove the front right hand wheel.
  16.  
  17. Remove the engine undercover.
  18.  
  19. Remove the right hand inner splash shield.
  20.  
  21. Remove the drive belts and idler pulley.
  22.  
  23. Recover the A/C refrigerant and remove the A/C compressor.
  24.  
  25. Removev engine oil cooler pipe bolts.
  26.  
  27. Remove the power steering oil pump and reservoir tank with lines attached and position them aside.
  28.  
  29. Remove the lower oil pan.
  30.  
  31. Remove the alternator.
  32.  
  33. Disconnect the engine harness and position aside.
  34.  
  35. Remove the A/C low-pressure flexible hose.
  36.  
  37. Support the engine using a suitable support device and remove the right hand engine mount insulator, mount and bracket.
  38.  
  39. Remove the chain tensioner cover and water pump cover.
  40.  
  41. Remove the left and right IVT control covers. Loosen the IVT control cover bolts in the order illustrated.
  42.  


    Click image to see an enlarged view

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



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.

  1. Remove the starter.
  2.  
  3. Remove the intake manifold collector.
  4.  
  5. Remove the ignition coils. Make sure to note the locations for installation purposes.
  6.  
  7. Remove the spark plugs.
  8.  
  9. Remove the engine oil dipstick.
  10.  
  11. If removing the secondary timing chains, remove the rocker covers as follows:
    1. Remove the engine cover.
    2.  
    3. Remove side engine covers.
    4.  
    5. If removing right hand rocker cover, disconnect the Mass Air Flow (MAF) sensor electrical connector and remove the air cleaner-to-electric throttle control actuator tube and air cleaner lid.
    6.  
    7. If removing right hand rocker cover, remove the following:
    8.  
    9. Front cowl panel.
    10.  
    11. Windshield wiper arms and motor assembly.
    12.  
    13. Intake manifold collector.
    14.  
    15. If removing left hand rocker cover, disconnect the Air Fuel Ratio (AFR) sensor.
    16.  
    17. Remove the ignition coils.
    18.  
    19. Position engine harness aside.
    20.  
    21. Disconnect Positive Crankcase Ventilation (PCV) hose.
    22.  
    23. Remove the dipstick.
    24.  
    25. Remove the rocker cover bolts in the sequence illustrated.
    26.  

  12.  
  13. Remove the IVT control solenoid valves and discard the gaskets.
  14.  
  15. Position 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 timing indicator.
    2.  
    3. Check that intake and exhaust camshaft lobes on No. 1 cylinder on the right bank of engine are located as illustrated. If not, turn the crankshaft one revolution (360 degrees) and align as illustrated.
    4.  

  16.  
  17. Lock the ring gear using tool J-44716 attached to the starter bolt hole.
  18.  


    Click image to see an enlarged view

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



    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



NOTE
Do not damage the ring gear teeth, or the signal plate teeth behind the ring gear, when setting the tool J-44716.

  1. 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.  

  2.  
  3. Position a pulley puller at recess hole of crankshaft pulley to remove crankshaft pulley.
  4.  


    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



    Click image to see an enlarged view

    Fig. Loosen lower oil pan front bolts in this order-3.5L engine



    Click image to see an enlarged view

    Fig. Loosen upper oil pan front bolts in this order-3.5L engine



CAUTION
Do not use a puller claw on crankshaft pulley periphery.

  1. Remove the lower oil pan.
  2.  
  3. Loosen upper oil pan front bolts in the order illustrated.
  4.  
  5. Temporarily install lower oil pan.
  6.  
  7. Support front of engine under oil pan using a jack and wood block.
  8.  
  9. Remove the front timing chain case as follows:
    1. Loosen the front timing chain case bolts in the order illustrated.
    2.  
    3. Insert the appropriate size tool such as J-37228 into the notch at the top of the front timing chain case as illustrated.
    4.  

  10.  
  11. Pry off the case by moving the suitable tool back and forward.
  12.  


CAUTION
Do not use a screwdriver or similar tool.


NOTE
After removal, handle the cover carefully so it does not bend, or warp under a load.

  1. Remove the water pump cover and chain tensioner cover from the front timing chain case using Tool J-37228.
  2.  


CAUTION
Do not insert a screwdriver, this will damage the mating surfaces.

  1. Remove the front oil seal from the front timing chain case using a suitable tool being careful not to damage the front cover.
  2.  
  3. If necessary, remove timing chain and related parts.
  4.  
  5. Use a scraper to remove all of the old sealant from the front timing chain mating surfaces. Be careful not to damage the mating surfaces while cleaning.
  6.  


    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



    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


To install:

  1. Install the timing chain and related parts, if removed.
  2.  
  3. Install the left and right dowel pins into the front timing chain case up to a point close to taper in order to shorten protrusion length.
  4.  
  5. Install the front oil seal on the front timing chain case. Apply new engine oil to the oil seal edges. Install it so that each seal lip is oriented as illustrated.
  6.  
  7. Make sure the garter spring is in position and seal lip is not inverted.
  8.  
  9. Apply a 0.102-0.142 inch (2.6-3.6mm) bead of RTV sealant to front timing chain case as illustrated. Make sure to wipe off the protruding sealant prior to installation.
  10.  
  11. Install the dowel pin on the rear timing chain case into the dowel pin hole in the front timing chain case.
  12.  
  13. Apply a 0.138-0.77 inch (3.5-4.5mm) bead of RTV sealant to the top surface of the upper oil pan as illustrated.
  14.  
  15. Install the front timing chain case as follows:
    1. Install the lower end of the front timing chain case tightly onto the top surface of the upper oil pan. Make sure that the oil pan gasket is in place.
    2.  
    3. While pressing the front timing chain case from its front and top as illustrated, hammer the dowel pin until the outer end becomes flush with the surface.
    4.  

  16.  
  17. Loosely install the front timing chain case bolts, refer to the illustration for bolt location.
  18.  
  19. Tighten the front timing chain case bolts in the order illustrated. Bolt positions in the illustration and torques are as follows:
    1. Bolt location 1 and 2 with a diameter of 0.31 inch (8 mm) are torqued to 21 ft. lbs. (28 Nm).
    2.  
    3. Bolt locations for bolts 3 through 22 with a diameter of 0.24 inch (6 mm) are torqued to 9 ft. lbs. (13 Nm).
    4.  

  20.  
  21. Install the upper oil pan front bolts in the order illustrated and tighten to 13 ft. lbs. (17 Nm).
  22.  
  23. Install the 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.  

  24.  
  25. 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.
  26.  
  27. Tighten the intake valve timing control cover bolts in the order illustrated to 100 inch lbs. (11 Nm).
  28.  
  29. 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).
  30.  
  31. Install the 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.  

  32.  
  33. Rotate crankshaft pulley in a clockwise direction as viewed from front of the engine to confirm it turns smoothly.
  34.  
  35. Install the rocker covers in the reverse order of removal, make sure to perform the following:
  36.  
  37. Apply sealant to the areas on the front corners.
  38.  
  39. 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.  

  40.  
  41. Install the remaining components is in reverse order of removal.
  42.  


    Click image to see an enlarged view

    Fig. Install the left and right dowel pins into the front timing chain case up to a point close to taper in order to shorten protrusion length-3.5L engine



    Click image to see an enlarged view

    Fig. Install the front oil seal on the front timing chain case-3.5L engine



    Click image to see an enlarged view

    Fig. Make sure the garter spring is in position and seal lip is not inverted when installing the front oil seal-3.5L engine



    Click image to see an enlarged view

    Fig. Apply a 0.102-0.142 inch (2.6-3.6mm) bead of RTV sealant to front timing chain case-3.5L engine



    Click image to see an enlarged view

    Fig. Apply a 0.138-0.77 inch (3.5-4.5mm) bead of RTV sealant to top surface of the upper oil pan-3.5L engine



    Click image to see an enlarged view

    Fig. Install lower end of front timing chain case tightly onto top surface of the upper oil pan-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

 
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