Nissan Quest 2001-02 and 2004-06

Timing Belt

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Removal & Installation



3.3L Engine

On this vehicle, right side refers to the -rear- components (near the firewall) and left side refers to the "front" components (near the radiator).

  1. If the timing belt is to be removed, it is good practice to turn the crankshaft until the engine is at Top Dead Center (TDC) of the No. 1 cylinder, compression stroke (firing position), before beginning work. This should align all timing marks and serve as a reference for all work that follows. After verifying that the engine is at TDC for the No. 1 cylinder, do not crank the engine or allow the crankshaft or camshaft sprockets to be turned otherwise engine timing will be lost.
  2.  
  3. Before servicing the vehicle, refer to the precautions section.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Alternator drive belt, water pump and power steering pump belt and the air conditioning compressor belt, if equipped
     
    3 air conditioning compressor drive belt idler pulley bolts and the idler pulley, if equipped with air conditioning
     
    Upper radiator hose bracket bolt
     
    Upper hose with the bracket from the vehicle
     
    Water bypass hose from between the thermostat housing and the lower water hose connection
     
    Main wiring harness from the upper engine front cover
     
    8 upper engine front cover bolts and the upper cover
     
    Right side front wheel and tire assembly
     
    4 right side engine and transmission splash shield bolts and 2 screws, and right side outer engine and transaxle splash shield
     

  8.  
  9. Use a strap wrench to hold the water pump pulley. Remove the 4 pulley bolts, and the water pump pulley.
  10.  
  11. Use a strap wrench to hold the crankshaft pulley. Remove the center pulley bolt, and the crankshaft pulley using a harmonic balancer (damper) puller to draw the pulley from the front of the crankshaft.

    5 lower engine front cover bolts, then remove the lower engine front cover
     

  12.  
  13. Be sure that the timing marks between the crankshaft sprocket and the oil pump housing align.
  14.  
  15. If the timing belt is to be reused, mark an arrow on the belt indicating the direction of rotation. The directional arrow is necessary to ensure that the timing belt, if it to be reused, can reinstalled in the same direction.
  16.  
  17. Loosen the timing belt tensioner nut and slip the timing belt off of the sprockets.
  18.  
  19. If necessary, the camshaft sprockets can be removed. A special spanner tool is designed to hold the sprocket to keep it from turning while the center bolt is being loosened. Use care if using substitutes.
    NOTE
    The sprockets are not interchangeable.

  20.  
  21. If necessary, the crankshaft sprocket can be removed. The outer timing belt guide (looks like a large washer) and the crankshaft sprocket simply pull off the front of the crankshaft.
    NOTE
    Be careful, there are 2 crankshaft keys. Use care not to loose them.



    Click image to see an enlarged view

    Fig. Use a shop rag to clean the alignment marks for the timing belt- 3.3L engines

  22.  

To install:

  1. Clean all parts well. If removed, inspect the crankshaft sprocket for warping or abnormal wear. Check the sprocket teeth for wear, deformation, chipping or other damage. Replace as necessary. Clean the sprocket mounting surface to ease installation. Install the key. Slip the sprocket onto the crankshaft. Tap it in place with a suitably-sized socket.
  2.  
  3. If removed, inspect the camshaft sprockets for damage and wear. Replace as required. The sprockets should be marked L3 to designate the front, or left side camshaft and R3 to designate the rear, or right side camshaft. Use care to install the sprockets properly. A special spanner tool is designed to hold the sprocket to keep it from turning while the center bolt is being tightened. Use care if using a substitute. Tighten the camshaft sprocket center bolts to 61 ft. lbs. (83 Nm). Verify that the timing marks on the camshaft sprockets and the timing marks on the rear cover (called the seal plate) are aligned.
  4.  
  5. Use an Allen wrench to turn the timing belt tensioner clockwise until the belt tensioner spring is fully extended. Temporarily tighten the tensioner nut to 32-43 ft. lbs. (43-58 Nm).
  6.  
  7. If a new timing belt is to be installed, look for a printed arrow on the belt. Be sure the arrow is pointing away from the engine. If the original timing belt is to be reused, be sure that the directional arrow that was marked at disassembly is facing the correct direction.
  8.  
  9. A new Original Equipment Manufacture (OEM) timing belt should have 3 white timing marks on it that indicate the correct timing positions of the camshafts and the crankshaft. These marks are to help ensure that the engine is properly timed. When the engine is properly timed, each white timing mark on the timing belt will be aligned with the corresponding camshaft and crankshaft timing mark on the sprocket. Because the white timing marks are not evenly spaced, the technician needs to use care in installing the belt. There should be 40 timing belt teeth between the timing marks on the front and rear camshaft sprockets and 43 teeth between the timing mark on the front camshaft sprocket and the timing mark on the crankshaft sprocket.
  10.  
  11. Verify that the camshaft timing marks are aligned with the timing marks on the rear cover (seal plate) and that the crankshaft sprocket timing mark is aligned with the timing mark on the oil pump housing.
  12.  
  13. Install the timing belt starting at the crankshaft sprocket and moving around the camshaft sprockets following a counterclockwise path. Do not allow any slack in the timing belt between the sprockets. After all of the timing marks are aligned with the timing belt installed, slip the timing belt onto the belt tensioner.
  14.  
  15. While holding the timing belt tensioner with an Allen wrench, loosen the tensioner nut. Allow the tensioner to put pressure on the timing belt. Use an Allen wrench to turn the timing belt tensioner 70-80 degrees clockwise and tighten the timing belt tensioner nut to 32-43 ft. lbs. (43-58 Nm).
    WARNING
    If any binding is felt when adjusting the timing belt tension by turning the crankshaft, STOP turning the engine, because the pistons may be hitting the valves.

  16.  
  17. Rotate the crankshaft clockwise twice and align the No. 1 piston to TDC on the compression stroke (firing position).
  18.  
  19. Apply 22 lbs. (10kg) of force on the timing belt between the rear camshaft sprocket and the timing belt tensioner. An assistant may be needed. While holding the timing belt tensioner steady with an Allen wrench, loosen the timing belt tensioner nut. Remove the Allen wrench and adjust the timing belt tensioner using the following procedure:
    1. Install a 0.0138 in. (0.35mm) thick and 0.500 in. (12.7mm) wide feeler gauge where the timing belt just starts to go around the tensioner (approximately the 4 o'clock position, looking at the tensioner).
    2.  
    3. Turn the crankshaft sprocket clockwise, which should force the feeler gauge between the timing belt and the tensioner, up to a position on the tensioner of about 1 o'clock.
    4.  
    5. Tighten the timing belt tensioner nut to 61 ft. lbs. (83 Nm).
    6.  
    7. Turn the crankshaft clockwise to rotate the feeler gauge out from between the timing belt tensioner and the timing belt.
    8.  

  20.  
  21. Rotate the crankshaft clockwise twice, and once again align the No. 1 piston to TDC on the compression stroke (firing position).
  22.  
  23. Apply 22 lbs. (10kg) of force on the timing belt between the front and rear camshaft sprockets. Measure the amount of belt deflection. Belt deflection should be between 0.51-0.59 in. (13-15mm). If belt deflection is out of specification, repeat Steps 29 through 33. If the timing belt deflection cannot be adjusted into specification, the timing belt will have to be replaced.
  24.  
  25. Install or connect the following:

    Lower engine front cover and the 5 lower cover bolts. Do not over tighten. Tighten to 27-44 inch lbs. (3-5 Nm).
     
    Outer timing belt guide next to the crankshaft sprocket with the dished side facing away from the cylinder block. Install the crankshaft pulley. Use a strap wrench to keep the crankshaft pulley from turning and tighten the center bolt to 148 ft. lbs. (201 Nm).
     
    Water pump pulley on the pump. Install the 4 bolts. Use a strap wrench to keep the water pump pulley from turning and tighten the 4 water pump pulley bolts to 89 inch lbs. (10 Nm).
     
    Right side outer engine and transaxle splash shield, and secure with the 4 bolts and 2 screws
     
    Right side front wheel. Tighten the lug nuts to 72-87 ft. lbs. (98-118 Nm).
     
    Upper engine timing belt front cover, and tighten the 8 bolts to 27-44 inch lbs. (3-5 Nm)
     
    Main wiring harness on the upper engine front cover
     
    Water bypass hose between the thermostat housing and water connection
     
    Upper radiator hose between the radiator and the water hose connection. Secure the hoses with clamps. Install the upper radiator hose bracket. Tighten the bracket bolt to 34-58 ft. lbs. (46-65 Nm).
     
    Air conditioning compressor drive belt idler pulley and install the 3 bolts. Tighten to 15 ft. lbs. (21 Nm), if equipped
     
    Alternator drive belt, the water pump and power steering pump drive belt and the air conditioning compressor drive belt, if equipped.
     
    Negative battery cable
     

  26.  
  27. Fill the cooling system.
  28.  
  29. Start the engine and allow it to warm to operating temperature. Check and adjust the ignition timing. Road test to verify correct engine operation.
  30.  

 
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