Sentra 1998

Camshaft, Bearings & Lifters

Print

Inspection



Check camshaft for scratches, seizure and wear.

Removal & Installation



1.6L & 1.8L Engines

Specific to:

Nissan Sentra 1997-2006

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Relieve the fuel system pressure.

    Click image to see an enlarged view

    Fig. Be sure to install the camshaft bearing caps in their original positions-1.6L and 1.8L engines engine

  6.  
  7. Remove or disconnect the following:
    NOTE
    Before the camshafts are removed from the cylinder head, note the positioning of the pins at the end of the camshafts for reassembly purposes.



    Negative battery cable
     
    All engine drive belts
     
    Exhaust pipe from the exhaust manifold
     
    Power steering pulley and pump with the mounting bracket
     
    Cylinder head cover
     
    Distributor assembly
     
    Timing chain tensioners and camshaft sprocket
     



    Camshaft bearing caps in sequence
     
    Camshafts from the cylinder head
     
    Idler sprocket bolt. These parts should be reassembled in their original position.
     
    Shims from the tops of the lifters. Be sure to note the position of each shim.
     
    Valve lifters from the bores in the cylinder head. Note the positioning of the lifters for reassembly.
     

  8.  
  9. Measure the diameter of the lifters. The diameter should be 1.1795-1.1801 in. (29.960-29.975mm).
  10.  
  11. Measure the diameter of the lifter bores. The diameter should be 1.1811-1.1819 in. (30.000-30.021mm).
  12.  
  13. Clearance between the lifter and bore should be 0.0010-0.0024 in. (0.025-0.061mm).
  14.  

To install:

  1. Install or connect the following:
    NOTE
    The exhaust and intake camshafts are marked with identification stamps. (E for exhaust and I for intake).



    Lifters and shims to the cylinder head in the proper locations as noted during removal
     



    Camshafts to the cylinder head and position the intake camshaft knock pin at the 9 o'clock position and the exhaust camshaft at the 12 o'clock position

    Click image to see an enlarged view

    Fig. Positioning and identification of the camshafts-1.6L and 1.8L engines



    Click image to see an enlarged view

    Fig. If removed, apply liquid gasket to the distributor bracket as shown-1.6L and 1.8L engine



    Click image to see an enlarged view

    Fig. Camshaft bolt torque sequence-1.6L and 1.8L engines

     

  2.  
  3. Install the camshaft bearing caps and tighten the mounting bolts as follows:
    1. Bolts 11 through 15, then bolts 1 through 10: 18 inch lbs. (2 Nm).
    2.  
    3. Bolts 1 through 15: 53 inch lbs. (6 Nm).
    4.  
    5. Bolts 1 through 14: 87-105 inch lbs. (10-12 Nm).
    6.  
    7. Bolt 15: 56-73 inch lbs. (7-8 Nm).
      NOTE
      If any part of the valvetrain has been has been replaced, the valve adjustment must be checked. DO NOT adjust the valves or rotate the camshafts at this point. Internal engine damage will result.

    8.  

  4.  
  5. Install or connect the following:

    Camshaft sprockets with timing chains
     
    Distributor assembly
     

  6.  
  7. Check and adjust the valve clearance.

    Cylinder head cover
     
    Power steering pulley pump
     
    Exhaust pipe from the exhaust manifold
     
    All engine drive belts
     
    Negative battery cable
     

  8.  
  9. Fill the cooling system.
  10.  
  11. Start the vehicle, check for leaks and repair if necessary.
  12.  

2.0L Engine

Specific to:

Nissan Sentra 1997-2001

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Properly relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Valve cover and oil separator
     

  6.  
  7. Rotate the crankshaft until the No.1 piston is at Top Dead Center (TDC) on the compression stroke. Then, rotate the crankshaft until the mating marks on the camshaft sprockets line up with the mating marks on the timing chain.

    Timing chain tensioner
     
    Distributor
     
    Timing chain guide
     
    Camshaft sprockets. Use a wrench to hold the camshaft while loosening the sprocket bolt.
     
    Camshaft bracket bolts in the opposite order of the tightening sequence
     
    Camshaft
     

  8.  

To install:

Click image to see an enlarged view

Fig. To prevent damage to the camshafts, torque the bearing caps in the numbered--.



Click image to see an enlarged view

Fig. --- and lettered sequence shown. Refer to the text for the proper torque-2.0L engines

  1. Clean the left-hand camshaft end bracket and coat the mating surface with liquid gasket. Install the camshafts, camshaft brackets, oil tubes and baffle plate. Ensure the left camshaft key is at 12 o'clock and the right camshaft key is at 10 o'clock.
  2.  
  3. The procedure for tightening camshaft bolts must be followed exactly to prevent camshaft damage. Torque the bolts as follows:
    1. Right bolts 9 and 10 (in that order): 18 inch lbs. (2 Nm).
    2.  
    3. Right bolts 1-8 (in that order): 18 inch lbs. (2 Nm).
    4.  
    5. Left bolts 11 and 12 (in that order): 18 inch lbs. (2 Nm).
    6.  
    7. Left bolts 1-10 (in that order): 18 inch lbs. (2 Nm).
    8.  
    9. All bolts in sequence: 52 inch lbs. (6 Nm).
    10.  
    11. All bolts in sequence: 7-9 ft. lbs. (9-12 Nm) for type A, B and C bolts and 13-19 ft. lbs. (18-25 Nm) for type D bolts.
    12.  

  4.  
  5. Line up the mating marks on the timing chain and camshaft sprockets and install the sprockets. Torque the sprocket bolts to 101-116 ft. lbs. (137-157 Nm).
  6.  
  7. Install or connect the following:

    Timing chain guide
     
    Distributor
     
    Timing chain tensioner
     
    Valve cover and oil separator
     
    Negative battery cable
     

  8.  
  9. Start the vehicle, check for leaks and repair if necessary.
  10.  

 
label.common.footer.alt.autozoneLogo