Lexus Car ES, IS, LS 1998-06

Valve Lash (Clearance) Adjustment 2

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3MZ-FE Engines



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable. Wait at least 90 seconds before performing any other work
     
    Front suspension upper brace center
     
    V-bank cover sub-assembly
     
    Air cleaner assembly
     
    Emission control valve set
     
    Intake air surge tank
     
    Ignition coil assembly
     
    Cylinder head valve covers
     

  4.  
  5. Turn the crankshaft pulley and align its groove with the timing mark0
  6.  
  7. Measure the clearance between the valve lash adjuster and the camshaft on the valves in the first sequence and record.
    1. The intake valve clearance cold is 0.006-0.010 in. (0.15-0.25mm).
    2.  
    3. The exhaust valve clearance cold is 0.010-0.014 in. (0.25-0.35mm).
    4.  

  8.  
  9. Turn the crankshaft 2/3 revolution and (240 degrees).
  10.  
  11. Measure the clearance between the valve lash adjuster and the camshaft on the valves in the second sequence and record.
    1. The intake valve clearance cold is 0.006-0.010 in. (0.15-0.25mm).
    2.  
    3. The exhaust valve clearance cold is 0.010-0.014 in. (0.25-0.35mm).
    4.  

  12.  
  13. Turn the crankshaft 2/3 revolution and (240 degrees).
  14.  
  15. Measure the clearance between the valve lash adjuster and the camshaft on the valves in the third sequence and record.
    1. The intake valve clearance cold is 0.006-0.010 in. (0.15-0.25mm).
    2.  
    3. The exhaust valve clearance cold is 0.010-0.014 in. (0.25-0.35mm).
    4.  

  16.  
  17. Adjust the valve lash using the following procedure
  18.  
  19. Remove the adjusting shim and turn the crankshaft to position the cam lobe of the camshaft on the adjusting valve upward. Position the hole in the shim toward the outside of the cylinder head. Press down the valve lash adjuster with the proper tool and place the proper tool between the camshaft and the valve lash adjuster. Remove the tool.
  20.  
  21. Remove the adjusting shim with the proper tool.
  22.  
  23. Determine the thickness of the replacement shim as follows:
    1. T = Thickness of the used shim
    2.  
    3. A = Measured valve clearance
    4.  
    5. N = Thickness of new shim
    6.  
    7. Intake: N = T + (A - 0.006-0.010 in. (0.15-0.25mm))
    8.  
    9. Exhaust: N = T + (A - 0.010-0.014 in. (0.25-0.35mm))
    10.  

  24.  


    Click image to see an enlarged view

    Fig. Measuring and adjust these valves first-3.3 L (3MZ-FE) Engine



    Click image to see an enlarged view

    Fig. Measuring and adjust these valves second-3.3 L (3MZ-FE) Engine



    Click image to see an enlarged view

    Fig. Measuring and adjust these valves third-3.3 L (3MZ-FE) Engine



    Click image to see an enlarged view

    Fig. Using special tool to remove the adjusting shim-3.3 L (3MZ-FE) Engine



NOTE
Place the adjusting shim on the valve lifter with the imprinted number facing down.

  1. Reinstall the following

    Cylinder head valve covers
     
    Ignition coil assembly
     
    Intake air surge tank
     
    Emission control valve set
     
    Air cleaner assembly
     
    Vacuum hoses
     
    Front suspension upper center brace
     
    Negitive battery cable
     

  2.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable. Wait at least 90 seconds before performing any other work
     
    Front suspension upper brace center
     
    V-bank cover sub-assembly
     
    Air cleaner assembly
     
    Emission control valve set
     
    Intake air surge tank
     
    Ignition coil assembly
     
    Cylinder head valve covers
     

  4.  
  5. Turn the crankshaft pulley and align its groove with the timing mark 0 of the No. 1 timing cover. Check that the timing marks of the camshaft timing pulleys and timing belt rear plates are aligned. If not, turn the crankshaft 1 revolution (360 degrees) and align the mark.
  6.  
  7. Measure the clearance between the valve lash adjuster and the camshaft on the valves in the first sequence and record.
    1. The intake valve clearance cold is 0.006-0.010 in. (0.15-0.25mm).
    2.  
    3. The exhaust valve clearance cold is 0.010-0.014 in. (0.25-0.35mm).

      Click image to see an enlarged view

      Fig. Measuring and adjust these valves first-3.3 L (3MZ-FE) Engine



      Click image to see an enlarged view

      Fig. Measuring and adjust these valves second-3.3 L (3MZ-FE) Engine



      Click image to see an enlarged view

      Fig. Measuring and adjust these valves third-3.3 L (3MZ-FE) Engine

    4.  

  8.  
  9. Turn the crankshaft 2/3 revolution and (240 degrees).
  10.  
  11. Measure the clearance between the valve lash adjuster and the camshaft on the valves in the second sequence and record.
    1. The intake valve clearance cold is 0.006-0.010 in. (0.15-0.25mm).
    2.  
    3. The exhaust valve clearance cold is 0.010-0.014 in. (0.25-0.35mm).
    4.  

  12.  
  13. Turn the crankshaft 2/3 revolution and (240 degrees).
  14.  
  15. Measure the clearance between the valve lash adjuster and the camshaft on the valves in the third sequence and record.
    1. The intake valve clearance cold is 0.006-0.010 in. (0.15-0.25mm).
    2.  
    3. The exhaust valve clearance cold is 0.010-0.014 in. (0.25-0.35mm).
    4.  

  16.  
  17. Adjust the valve lash using the following procedure
  18.  
  19. Remove the adjusting shim and turn the crankshaft to position the cam lobe of the camshaft on the adjusting valve upward. Position the hole in the shim toward the outside of the cylinder head. Press down the valve lash adjuster with the proper tool and place the proper tool between the camshaft and the valve lash adjuster. Remove the tool.
  20.  
  21. Remove the adjusting shim with the proper tool.
  22.  
  23. Determine the thickness of the replacement shim as follows:
    1. T = Thickness of the used shim
    2.  
    3. A = Measured valve clearance
    4.  
    5. N = Thickness of new shim
    6.  
    7. Intake: N = T + (A - 0.006-0.010 in. (0.15-0.25mm))
    8.  
    9. Exhaust: N = T + (A - 0.010-0.014 in. (0.25-0.35mm))
      NOTE
      Place the adjusting shim on the valve lifter with the imprinted number facing down.



      Click image to see an enlarged view

      Fig. Using special tool to remove the adjusting shim-3.3 L (3MZ-FE) Engine

    10.  

  24.  
  25. Reinstall the following

    Cylinder head valve covers
     
    Ignition coil assembly
     
    Intake air surge tank
     
    Emission control valve set
     
    Air cleaner assembly
     
    Vacuum hoses
     
    Front suspension upper center brace
     
    Negitive battery cable
     

  26.  

4gr-Fse & 2gr-Fse Engines



The 2.5L (4GR-FSE) and 3.5L (2GR-FSE) engines are equipped with hydraulic valves which are not adjustable.

 
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