Nissan Quest 2001-02 and 2004-06

Timing Chain Cover, Chain, Sprockets & Rear Case 1

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Removal & Installation



3.5L Engine


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



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

4-Speed
  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.
  36.  


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    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 rocker covers as follows:
    1. Remove the engine cover.
    2.  
    3. Remove side engine covers.
    4.  

  6.  
  7. If removing right hand rocker cover, remove the following:

    Front cowl panel
     
    Windshield wiper arms and motor assembly
     
    Intake manifold collector.
     
    If removing left hand rocker cover, disconnect the Air Fuel Ratio (AFR) sensor.
     
    Remove the ignition coils.
     
    Position engine harness aside.
     
    Disconnect Positive Crankcase Ventilation (PCV) hose.
     
    Remove the dipstick.
     
    Remove the rocker cover bolts in the sequence illustrated.
     

  8.  
  9. Remove the spark plugs.
  10.  
  11. Disconnect and remove the IVT control solenoid valves and discard the gaskets
  12.  
  13. 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.
    4.  

  14.  
  15. Lock the ring gear using tool J-44716 attached to the starter bolt hole.
  16.  


    Click image to see an enlarged view

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



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



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



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    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



CAUTION
Do not damage the ring gear teeth, or the signal plate teeth behind the ring gear, when setting the tool.

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

  2.  


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



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



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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

  1. Remove the front timing chain case after loosening the front timing chain case bolts in the order illustrated.
  2.  
  3. Remove the internal chain guide.
  4.  
  5. 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.
    6.  


      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

    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.  

  6.  
  7. Remove primary timing chain and crankshaft sprocket.
  8.  


    Click image to see an enlarged view

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



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    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



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



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



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



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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

  1. 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.
  2.  
  3. Remove the intake and exhaust camshaft sprocket bolts. Put matchmarks on the timing chain and camshaft sprockets to aid alignment during installation.
  4.  
  5. Use a wrench on the hexagonal portion of the camshaft and loosen the bolts as illustrated.
  6.  
  7. 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.  

  8.  
  9. Remove the camshaft sprocket and secondary timing chain with the timing chain removed from guide groove.
  10.  


    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



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).

  1. Remove the timing chain tension guide.
  2.  
  3. Remove the rear timing chain case as follows:
  4.  


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.
  4.  



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



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

  1. Disconnect the inlet coolant hose.
  2.  
  3. Remove the inlet coolant housing, gasket and thermostat.
  4.  
  5. Remove O-rings on the cylinder head and cylinder block.
  6.  
  7. Loosen the No. 1 camshaft bracket bolts in several steps in the sequence illustrated and remove No. 1 camshaft brackets.
  8.  
  9. Remove the camshaft chain tensioners, for secondary timing chains.
  10.  
  11. If necessary, remove the water pump.
  12.  
  13. 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.
  14.  
  15. Remove the front oil seal from the front timing chain case using a suitable tool.
  16.  
  17. Check for cracks and any excessive wear at the roller links of the timing chain. Replace the timing chain as necessary.
  18.  


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



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


To install:



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

  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.
    6.  

  12.  
  13. Apply silicone sealant to rear timing chain case as illustrated, clean off the protruding sealant prior to installation.
    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 bolts are initially tightened, retighten them to the specification in the order illustrated.
    8.  
    9. After installing rear timing chain case, check 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.
    10.  



    Click image to see an enlarged view

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

  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.
  20.  


    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



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    Fig. Camshaft bolt tightening sequence-3.5L engine



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



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).

  1. Install the secondary timing chains and camshaft sprockets as follows:
  2.  


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.



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



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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.
  2.  


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.

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

  1. Tighten the timing chain tension guide bolts to 16 ft. lbs. (21 Nm).
  2.  


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.

  1. After confirming the mating marks are aligned, tighten the camshaft sprocket bolts to 76 ft. lbs. (102 Nm).
  2.  
  3. Remove the stopper pins out from the timing chain tensioners, on secondary timing chains.
  4.  
  5. Install the crankshaft sprocket on the crankshaft. Make sure the mating marks on the crankshaft sprocket face the front of the engine.
  6.  
  7. 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.
    2.  

  8.  


    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



    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



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.

 
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