Nissan Quest 2001-02 and 2004-06

Camshaft, Bearings & Lifters

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Removal & Installation



3.3L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Upper intake manifold
     
    Valve covers
     

  6.  


NOTE
Keep all valvetrain components in order for assembly.



Rocker arm and shaft assemblies
 
Valve lifter guide and valve lifters. Attach a wire to the top of the lifters so that they will not drop from the lifter guide.
 
Radiator
 
Accessory drive belts
 
Front cover
 
Timing belt
 
Camshaft sprockets
 
Camshaft seals
 
Rear timing cover
 
Distributor
 
Cylinder head rear covers
 
Camshaft locating plates
 
Camshafts
 

To install:

  1. Install or connect the following:

    Camshafts
     
    Camshaft locating plates. Tighten the bolts to 58-65 ft. lbs. (78-88 Nm).
     
    Cylinder head rear covers
     
    Distributor
     
    Rear timing cover
     
    Camshaft seals
     
    Camshaft sprockets. Tighten the bolts to 58-65 ft. lbs. (78-88 Nm).
     
    Timing belt
     
    Front cover
     
    Accessory drive belts
     
    Radiator
     
    Valve lifter guide and valve lifters
     
    Rocker arm and shaft assemblies. Tighten the bolts to 13-16 ft. lbs. (18-22 Nm).
     
    Valve covers
     
    Upper intake manifold
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  

  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:
    NOTE
    Keep all valvetrain components in order for assembly.



    Negative battery cable
     
    Upper intake manifold
     
    Valve covers
     



    Rocker arm and shaft assemblies
     
    Valve lifter guide and valve lifters. Attach a wire to the top of the lifters so that they will not drop from the lifter guide.
     
    Radiator
     
    Accessory drive belts
     
    Front cover
     
    Timing belt
     
    Camshaft sprockets
     
    Camshaft seals
     
    Rear timing cover
     
    Distributor
     
    Cylinder head rear covers
     
    Camshaft locating plates
     
    Camshafts
     

  6.  

To install:

  1. Install or connect the following:

    Camshafts
     
    Camshaft locating plates. Tighten the bolts to 58-65 ft. lbs. (78-88 Nm).
     
    Cylinder head rear covers
     
    Distributor
     
    Rear timing cover
     
    Camshaft seals
     
    Camshaft sprockets. Tighten the bolts to 58-65 ft. lbs. (78-88 Nm).
     
    Timing belt
     
    Front cover
     
    Accessory drive belts
     
    Radiator
     
    Valve lifter guide and valve lifters
     
    Rocker arm and shaft assemblies. Tighten the bolts to 13-16 ft. lbs. (18-22 Nm).
     
    Valve covers
     
    Upper intake manifold
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  

3.5L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Before servicing the vehicle, refer to the Precautions section.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove the front timing chain case, camshaft sprocket, timing chain and the rear timing chain case.
  8.  
  9. If necessary, remove both the Camshaft Position (CMP) sensors from cylinder head back side.
  10.  


    Click image to see an enlarged view

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



NOTE
Handle carefully to avoid dropping and shocks. Do not disassemble. Do not allow metal powder to adhere to magnetic part at sensor tip. Do not place sensors in a location where they are exposed to magnetism.

  1. Remove the intake valve timing control solenoid valves. Discard the intake valve timing control solenoid valve gaskets and use new gaskets for installation.
  2.  
  3. Remove the intake and exhaust camshaft brackets. Mark the camshafts, camshaft brackets, and bolts so they are placed in the same position and direction for installation.
  4.  
  5. Equally loosen the camshaft bracket bolts in several steps in the numerical order shown.
  6.  
  7. Remove the camshaft.
  8.  
  9. Remove the valve lifter. Identify installation positions, and store them without mixing them up.
  10.  
  11. Remove the secondary timing chain tensioner from cylinder head with its stopper pin attached.
  12.  
  13. Inspect the Camshaft Runout as follows:
    1. Put V block on precise flat bed, and support No. 2 and No. 4 journal of camshaft.
    2.  
    3. Set dial gauge vertically to No. 3 journal.
    4.  
    5. Turn camshaft to one direction with hands, and measure camshaft runout on dial gauge. (Total indicator reading)
    6.  
    7. If it exceeds the limit, replace camshaft.
    8.  

  14.  
  15. Inspect the camshaft cam height as follows:
    1. Measure the camshaft cam height. Limit: 0.0020 inch (0.05 mm). Standard cam height (intake and exhaust): 1.7663-1.7738 inch (44.865-45.055 mm)
    2.  
    3. If wear is beyond the limit, replace camshaft.
    4.  

  16.  
  17. Inspect the camshaft journal clearance of the outer diameter of the camshaft journal as follows:
    1. Measure outer diameter of camshaft journal.
    2.  

  18.  


    Click image to see an enlarged view

    Fig. Camshaft bracket bolt loosening sequence-3.5L right side



    Click image to see an enlarged view

    Fig. Camshaft bracket bolt loosening sequence-3.5L left side



    Click image to see an enlarged view

    Fig. Camshaft identification-3.5L engine



    Click image to see an enlarged view

    Fig. Dowel pin orientation-3.5L engine



    Click image to see an enlarged view

    Fig. Camshaft bracket identification-3.5L engine


Cam wear limit: 0.008 inch (0.2 mm)

Standard outer diameter:



No. 1: 1.0211-1.0218 inch (25.935-25.955 mm)
 
No. 2, 3, 4: 0.9230-0.9238 inch (23.445-23.465 mm)
 

  1. Inspect the camshaft journal clearance of the inner diameter of the camshaft bracket as follows:
    1. Tighten camshaft bracket bolt with specified torque.
    2.  
    3. Using inside micrometer, measure inner diameter -A- of camshaft bracket.
    4.  

  2.  
  3. Calculate the camshaft journal clearance as follows:
  4.  

Journal clearance = inner diameter of camshaft bracket - outer diameter of camshaft journal. When outside the limit, replace either or both camshaft and cylinder head.


NOTE
Inner diameter of camshaft bracket is manufactured together with cylinder head. Replace the whole cylinder head assembly.

  1. Inspect the camshaft end play as follows:
    1. Install dial gauge in thrust direction on front end of camshaft. Measure end play of dial gauge when camshaft is moved forward and backward.
    2.  
    3. When out of the limit, replace with new camshaft and measure again.
    4.  
    5. When out of the limit again, replace with new cylinder head.
    6.  

  2.  

To install:



Click image to see an enlarged view

Fig. Align the stamp marks as shown



Click image to see an enlarged view

Fig. RTV sealer application



Click image to see an enlarged view

Fig. Camshaft bracket bolt torque sequence

  1. Install secondary chain tensioners on both sides of cylinder head.
    1. Install chain tensioner with its stopper pin attached.
    2.  
    3. Install tensioner with sliding part facing downward on right side cylinder head, and with sliding part facing upward on left side cylinder head.
    4.  
    5. Install O-ring as shown.
    6.  

  2.  
  3. Install valve lifters in their original position.
  4.  

Valve lifter outer diameter (Intake and exhaust)



1.3377-1.3381 inch (33.977-33.987 mm)
 

Standard (Intake and exhaust)



1.3386-1.3392 inch (34.000-34.016 mm)
 

Standard (Intake and exhaust)



0.0005-0.0015 inch (0.013-0.039 mm)
 

  1. Install camshafts.
    1. Install camshaft with dowel pin attached to its front end face on the exhaust side.
    2.  
    3. Follow your identification marks made during removal, or follow the identification marks that are present on the new camshafts for proper placement and direction.
    4.  
    5. Install camshaft so that dowel pin hole and dowel pin on front end face are positioned as shown in illustration. (No. 1 cylinder TDC on its compression stroke)
    6.  

  2.  


NOTE
Large- and small-pin holes are located on front end face of intake camshaft, at intervals of 180 degrees. Face small dia. side pin hole upward (in cylinder head upper face direction).

  1. Install camshaft brackets.
    1. Remove foreign material completely from camshaft bracket backside and from cylinder head installation face.
    2.  
    3. Install camshaft bracket in original position and direction as shown in illustration.
    4.  
    5. Install No.2 to 4 camshaft brackets aligning the stamp marks as shown.
    6.  

  2.  


NOTE
There are no identification marks indicating left and right for No. 1 camshaft bracket.

  1. Apply sealant to mating surface of No.1 camshaft bracket as shown on right and left banks.
  2.  


NOTE
Use RTV silicone sealant or equivalent.

  1. Tighten the camshaft brackets in the following steps, in numerical order as shown.
    1. Tighten No. 7 to 10, then tighten No.1 to 6 in order as shown.
    2.  
    3. Tighten No.1 to 10 in numerical order as shown.
    4.  
    5. Tighten No. 1 to 6 in the numerical order as shown.
    6.  
    7. Tighten No. 7 to 10 in the numerical order as shown.
    8.  



    17 inch lbs. (1.96 Nm)
     
    52 inch lbs. (5.88 Nm)
     
    80-104 inch lbs. (9.02-11.8 Nm)
     
    74-91 inch lbs. (8.3-10.3 Nm)
     

  2.  
  3. Measure difference in levels between front end faces of No. 1 camshaft bracket and cylinder head. If measurement is outside the specified range, re-install camshaft and camshaft bracket.
  4.  
  5. Inspect and adjust valve clearance.
  6.  
  7. Install in the reverse order of removal after this step.
  8.  
  9. Inspect the valve clearance as follows:
  10.  

Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if there is unusual engine conditions regarding valve clearance.

  1. Remove right and left rocker covers.
  2.  
  3. Measure valve clearance as below:
  4.  
  5. Set No.1 cylinder at TDC of its compression stroke. Align crankshaft pulley timing mark (grooved line without color) with timing indicator. Check that No. 1 cylinder intake and exhaust cam nose is facing in direction shown in illustration. If not, rotate crankshaft pulley 360 degrees -clockwise (when viewed from front).
  6.  
  7. Using a feeler gauge, measure valve clearance. Standard: -0.0055-0.0055 inch (-0.14 to 0.14 mm)
  8.  


NOTE
If inspection was carried out with cold engine, check that values with fully warmed up engine are still within specifications.



Rotate crankshaft by 240 degrees -clockwise (when viewed from front) to align No. 3 cylinder at TDC of its compression stroke.
 


NOTE
Crankshaft pulley mounting bolt flange has a stamped line every 60- degrees. They can be used as a guide to rotation angle.



Turn crankshaft pulley clockwise by 240 degrees from the position of No. 5 cylinder at compression TDC.
 
For measurements that are outside the specified range, perform adjustment below.
 



Click image to see an enlarged view

Fig. Valve clearance inspection-No.1 TDC on 3.5L engine



Click image to see an enlarged view

Fig. Valve clearance inspection-No.3 TDC on 3.5L engine



Click image to see an enlarged view

Fig. Valve clearance inspection-No.5 TDC on 3.5L engine



Adjust the clearance as follows:
 

Perform adjustment depending on selected head thickness of valve lifter. The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differences caused by temperature. Use the specifications for hot engine condition to adjust.

  1. Remove camshaft.
  2.  
  3. Remove the valve lifters at the locations that are outside the standard.
  4.  
  5. Measure the center thickness of the removed valve lifters with a micrometer.
  6.  
  7. Use the equation below to calculate valve lifter thickness for replacement.
  8.  

Valve lifter thickness calculation:

  1. Thickness of replacement valve lifter = t1 + (C1 - C2)
  2.  
  3. t1 = Thickness of removed valve lifter
  4.  
  5. C1 = Measured valve clearance
  6.  
  7. C2=Standard valve clearance:
  8.  

Thickness of a new valve lifter can be identified by stamp marks on the reverse side (inside the cylinder). Stamp mark 788U or 788R indicates 0.3102 inch ( 7.88 mm) in thickness.


NOTE
2 types of stamp marks are used for parallel setting and for manufacturer identification.

Available thickness of valve lifter: 27 sizes with range 0.3102-0.3307 inch (7.88-8.40 mm ) in steps of 0.0008 inch (0.02 mm) (when manufactured at factory).

  1. Install the selected valve lifter.
  2.  
  3. Install camshaft.
  4.  
  5. Manually turn crankshaft pulley a few turns.
  6.  
  7. Check that valve clearances for cold engine are within specifications by referring to the specified values.
  8.  
  9. After completing the repair, check valve clearances again with the specifications for warmed engine. Make sure the values are within specifications.
  10.  

Valve clearance:



Intake: 0.012 inch (0.30 mm)
 
Exhaust: 0.013 inch (0.33 mm)
 



Click image to see an enlarged view

Fig. Valve clearance specifications-3.5L engines

  1. Before servicing the vehicle, refer to the precautions section.

    Click image to see an enlarged view

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

  2.  
  3. Before servicing the vehicle, refer to the precautions section.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove the front timing chain case, camshaft sprocket, timing chain and the rear timing chain case.
  8.  
  9. If necessary, remove both the Camshaft Position (CMP) sensors from cylinder head back side.
    NOTE
    Handle carefully to avoid dropping and shocks. Do not disassemble. Do not allow metal powder to adhere to magnetic part at sensor tip. Do not place sensors in a location where they are exposed to magnetism.

  10.  
  11. Remove the intake valve timing control solenoid valves. Discard the intake valve timing control solenoid valve gaskets and use new gaskets for installation.
  12.  
  13. Remove the intake and exhaust camshaft brackets. Mark the camshafts, camshaft brackets, and bolts so they are placed in the same position and direction for installation.
  14.  
  15. Equally loosen the camshaft bracket bolts in several steps in the numerical order shown.
  16.  
  17. Remove the camshaft.
  18.  
  19. Remove the valve lifter. Identify installation positions, and store them without mixing them up.
  20.  
  21. Remove the secondary timing chain tensioner from cylinder head with its stopper pin attached.

    Click image to see an enlarged view

    Fig. Camshaft bracket bolt loosening sequence-3.5L right side



    Click image to see an enlarged view

    Fig. Camshaft bracket bolt loosening sequence-3.5L left side

  22.  
  23. Inspect the Camshaft Runout as follows:
    1. Put V block on precise flat bed, and support No. 2 and No. 4 journal of camshaft.
    2.  
    3. Set dial gauge vertically to No. 3 journal.
    4.  
    5. Turn camshaft to one direction with hands, and measure camshaft runout on dial gauge. (Total indicator reading)
    6.  
    7. If it exceeds the limit, replace camshaft.

      Click image to see an enlarged view

      Fig. Camshaft identification-3.5L engine



      Click image to see an enlarged view

      Fig. Dowel pin orientation-3.5L engine



      Click image to see an enlarged view

      Fig. Camshaft bracket identification-3.5L engine

    8.  

  24.  
  25. Inspect the camshaft cam height as follows:
    1. Measure the camshaft cam height. Limit: 0.0020 inch (0.05 mm). Standard cam height (intake and exhaust): 1.7663-1.7738 inch (44.865-45.055 mm)
    2.  
    3. If wear is beyond the limit, replace camshaft.
    4.  

  26.  
  27. Inspect the camshaft journal clearance of the outer diameter of the camshaft journal as follows:
    1. Measure outer diameter of camshaft journal.
    2.  

  28.  

Cam wear limit: 0.008 inch (0.2 mm)

Standard outer diameter:



No. 1: 1.0211-1.0218 inch (25.935-25.955 mm)
 
No. 2, 3, 4: 0.9230-0.9238 inch (23.445-23.465 mm)
 

  1. Inspect the camshaft journal clearance of the inner diameter of the camshaft bracket as follows:
    1. Tighten camshaft bracket bolt with specified torque.
    2.  
    3. Using inside micrometer, measure inner diameter -A- of camshaft bracket.
    4.  

  2.  
  3. Calculate the camshaft journal clearance as follows:
  4.  

Journal clearance = inner diameter of camshaft bracket - outer diameter of camshaft journal. When outside the limit, replace either or both camshaft and cylinder head.


NOTE
Inner diameter of camshaft bracket is manufactured together with cylinder head. Replace the whole cylinder head assembly.

  1. Inspect the camshaft end play as follows:
    1. Install dial gauge in thrust direction on front end of camshaft. Measure end play of dial gauge when camshaft is moved forward and backward.
    2.  
    3. When out of the limit, replace with new camshaft and measure again.
    4.  
    5. When out of the limit again, replace with new cylinder head.
    6.  

  2.  

To install:

Click image to see an enlarged view

Fig. Align the stamp marks as shown



Click image to see an enlarged view

Fig. RTV sealer application



Click image to see an enlarged view

Fig. Camshaft bracket bolt torque sequence

  1. Install secondary chain tensioners on both sides of cylinder head.
    1. Install chain tensioner with its stopper pin attached.
    2.  
    3. Install tensioner with sliding part facing downward on right side cylinder head, and with sliding part facing upward on left side cylinder head.
    4.  
    5. Install O-ring as shown.
    6.  

  2.  
  3. Install valve lifters in their original position.
  4.  

Valve lifter outer diameter (Intake and exhaust)



1.3377-1.3381 inch (33.977-33.987 mm)
 

Standard (Intake and exhaust)



1.3386-1.3392 inch (34.000-34.016 mm)
 

Standard (Intake and exhaust)



0.0005-0.0015 inch (0.013-0.039 mm)
 

  1. Install camshafts.
    1. Install camshaft with dowel pin attached to its front end face on the exhaust side.
    2.  
    3. Follow your identification marks made during removal, or follow the identification marks that are present on the new camshafts for proper placement and direction.
    4.  
    5. Install camshaft so that dowel pin hole and dowel pin on front end face are positioned as shown in illustration. (No. 1 cylinder TDC on its compression stroke)
      NOTE
      Large- and small-pin holes are located on front end face of intake camshaft, at intervals of 180 degrees. Face small dia. side pin hole upward (in cylinder head upper face direction).

    6.  

  2.  
  3. Install camshaft brackets.
    1. Remove foreign material completely from camshaft bracket backside and from cylinder head installation face.
    2.  
    3. Install camshaft bracket in original position and direction as shown in illustration.
    4.  
    5. Install No.2 to 4 camshaft brackets aligning the stamp marks as shown.
      NOTE
      There are no identification marks indicating left and right for No. 1 camshaft bracket.

    6.  
    7. Apply sealant to mating surface of No.1 camshaft bracket as shown on right and left banks.
      NOTE
      Use RTV silicone sealant or equivalent.

    8.  

  4.  
  5. Tighten the camshaft brackets in the following steps, in numerical order as shown.
    1. Tighten No. 7 to 10, then tighten No.1 to 6 in order as shown.
    2.  
    3. Tighten No.1 to 10 in numerical order as shown.
    4.  
    5. Tighten No. 1 to 6 in the numerical order as shown.
    6.  
    7. Tighten No. 7 to 10 in the numerical order as shown.

      17 inch lbs. (1.96 Nm)
       
      52 inch lbs. (5.88 Nm)
       
      80-104 inch lbs. (9.02-11.8 Nm)
       
      74-91 inch lbs. (8.3-10.3 Nm)
       

    8.  

  6.  
  7. Measure difference in levels between front end faces of No. 1 camshaft bracket and cylinder head. If measurement is outside the specified range, re-install camshaft and camshaft bracket.
  8.  
  9. Inspect and adjust valve clearance.
  10.  
  11. Install in the reverse order of removal after this step.
  12.  
  13. Inspect the valve clearance as follows:
  14.  

Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if there is unusual engine conditions regarding valve clearance.

  1. Remove right and left valve covers.
  2.  
  3. Measure valve clearance as below:
    NOTE
    If inspection was carried out with cold engine, check that values with fully warmed up engine are still within specifications.


    NOTE
    Crankshaft pulley mounting bolt flange has a stamped line every 60- degrees. They can be used as a guide to rotation angle.



    Set No.1 cylinder at TDC of its compression stroke. Align crankshaft pulley timing mark (grooved line without color) with timing indicator. Check that No. 1 cylinder intake and exhaust cam nose is facing in direction shown in illustration. If not, rotate crankshaft pulley 360 degrees -clockwise (when viewed from front).
     
    Using a feeler gauge, measure valve clearance. Standard: -0.0055-0.0055 inch (-0.14 to 0.14 mm)
     



    Rotate crankshaft by 240 degrees -clockwise (when viewed from front) to align No. 3 cylinder at TDC of its compression stroke.
     



    Turn crankshaft pulley clockwise by 240 degrees from the position of No. 5 cylinder at compression TDC.
     

  4.  
  5. For measurements that are outside the specified range, perform adjustment below.

    Click image to see an enlarged view

    Fig. Valve clearance inspection-No.1 TDC on 3.5L engine



    Click image to see an enlarged view

    Fig. Valve clearance inspection-No.3 TDC on 3.5L engine



    Click image to see an enlarged view

    Fig. Valve clearance inspection-No.5 TDC on 3.5L engine

  6.  

  1. Adjust the clearance as follows:
  2.  

Perform adjustment depending on selected head thickness of valve lifter. The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differences caused by temperature. Use the specifications for hot engine condition to adjust.

  1. Remove camshaft.
  2.  
  3. Remove the valve lifters at the locations that are outside the standard.
  4.  
  5. Measure the center thickness of the removed valve lifters with a micrometer.
  6.  
  7. Use the equation below to calculate valve lifter thickness for replacement.
  8.  

Valve lifter thickness calculation:



Thickness of replacement valve lifter = t1 + (C1 - C2)
 
t1 = Thickness of removed valve lifter
 
C1 = Measured valve clearance
 
C2=Standard valve clearance:
 

Thickness of a new valve lifter can be identified by stamp marks on the reverse side (inside the cylinder). Stamp mark 788U or 788R indicates 0.3102 inch ( 7.88 mm) in thickness.


NOTE
2 types of stamp marks are used for parallel setting and for manufacturer identification.

Available thickness of valve lifter: 27 sizes with range 0.3102-0.3307 inch (7.88-8.40 mm ) in steps of 0.0008 inch (0.02 mm) (when manufactured at factory).

  1. Install the selected valve lifter.
  2.  
  3. Install camshaft.
  4.  
  5. Manually turn crankshaft pulley a few turns.
  6.  
  7. Check that valve clearances for cold engine are within specifications by referring to the specified values.
  8.  
  9. After completing the repair, check valve clearances again with the specifications for warmed engine. Make sure the values are within specifications.
  10.  

Valve clearance:



Intake: 0.012 inch (0.30 mm)
 
Exhaust: 0.013 inch (0.33 mm)

Click image to see an enlarged view

Fig. Valve clearance specifications-3.5L engines

 

 
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