Lexus RX300, 330 3 2000-06

Valve Lash (Clearance) Adjustment

Print


NOTE
Adjust the valve clearance when the engine is cold.

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

    Negative battery cable. If equipped with an air bag, wait at least 90 seconds before proceeding.
     
    Accelerator/throttle cable from the throttle linkage
     
    Air cleaner cover, air flow meter and air duct assembly
     
    V-bank cover
     
    Emission control valve set
     
    Air intake chamber
     
    Engine harness from the injectors and the ignition coils
     
    Ignition coils and keep them in order for reassembly
     
    Spark plugs
     
    Cylinder head covers
     

  4.  
  5. Turn the crankshaft pulley and align its groove with the timing mark 0 of the No. 1 timing cover.
  6.  
  7. Check that the valve lifters on the No. 1 intake are loose and the No. 1 exhaust are tight. If not, turn the crankshaft 1 complete revolution (360 degrees).
    NOTE
    All measurements should be written down. These recorded measurements will need to be used in conjunction with a mathematical formula to determine the thickness of the replacement shims.

  8.  
  9. Measure the clearance between the valve lifters and the camshaft. Record the measurements on valves No. 1 and 6 intake; No. 2 and 3 exhaust.

    Click image to see an enlarged view

    Fig. Adjust these valves during the 1st step-RX300 and RX330

    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.  

  10.  
  11. Turn the crankshaft 2 / 3 of a revolution (240 degrees). Record the measurements on valves No. 2 and 3 intake; No. 4 and 5 exhaust.

    Click image to see an enlarged view

    Fig. Adjust these valves during the 2nd step-RX300 and RX330

  12.  
  13. Turn the crankshaft another 2 / 3 of a revolution. Record the measurements on valves No. 4 and 5 intake; No. 1 and 6 exhaust.

    Click image to see an enlarged view

    Fig. Adjust these valves during the 3rd step-RX300 and RX330

  14.  
  15. Remove the adjusting shim by turning the crankshaft to position the cam lobe of the camshaft in the up position on the valve to be adjusted. Using a small thin flat bladed tool, turn the valve lifter so that the notches are perpendicular to the camshaft. Press down the valve lifter with tool 09248-55010 part A. Place too 09248-55010 part B between the camshaft and the valve lifter; remove part A.
  16.  
  17. Remove the adjusting shim with a magnet and a small screwdriver.
  18.  
  19. Determine the replacement adjusting shim size by either using the charts or the following formulas:

    Intake: N = T + (A - 0.008 in./0.020mm)
     
    Exhaust: N = T + (A - 0.012 in./0.30mm)
     
    T = Thickness of removed shim
     
    A = Measured valve clearance
     
    N = Thickness of new shim
     

  20.  
  21. Select a new shim with a thickness as close as possible to the calculated value. Install the new replacement shim.
    NOTE
    Shims are available in 17 sizes in increments of 0.0020 in. (0.050mm), from 0.0984 in. (2.500mm) to 0.1299 in. (3.300mm).

  22.  
  23. Recheck the valve clearance.
  24.  
  25. Install or connect the following:

    Cylinder head covers
     
    Spark plugs and the ignition coils
     
    Engine wiring harness to the injectors and the coils
     
    Intake chamber
     
    Emission control valve set
     
    V-bank cover
     
    Air flow meter, air duct and air cleaner cover
     
    Negative battery cable
     

  26.  

2.4L Engine




NOTE
Adjust the valve clearance when the engine is cold.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable. If equipped with an air bag, wait at least 90 seconds before proceeding.
     
    Right front wheel, splash shield and apron seal
     
    engine undercover
     
    Coil pack
     
    Air intake hoses
     
    Cylinder head cover
     

  4.  
  5. Place the No.1 piston at TDC compression. Check only those valves shown. Record the clearance. If out of clearance, the measurement will be used to calculate the adjusting shims.
  6.  
  7. Place the No.4 piston at TDC compression. Check only those valves shown. Record the clearance. If out of clearance, the measurement will be used to calculate the adjusting shims.
  8.  

Clearance range is:



Intake: 0.19-0.29mm
 
Exhaust: 0.30-0.40mm
 

To adjust the valves:

  1. Turn the crankshaft 1 complete revolution (360 degrees) clockwise and set the No.1 piston at TDC compression. Place matchmarks on the chain and camshaft sprocket.
  2.  
  3. Remove the tensioner.
  4.  
  5. Loosen the camshaft sprocket bolt.
  6.  
  7. Remove the exhaust camshaft bearing caps, raise the camshaft and remove the sprocket. Tie the chain out of the way.
  8.  
  9. Remove the intake camshaft.
  10.  
  11. Remove the lifters and keep them in order.
  12.  
  13. Measure the thickness of any lifter on which the clearance was out of range. Calculate the thickness of the necessary replacement lifter. Lifters are available in 0.020mm increments from 5.060mm to 5.740mm.
  14.  
  15. For Camshaft and Timing Chain installation, see the respective procedures in this section.
  16.  

2.7L Engines



  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Drain the engine coolant.
  6.  
  7. Remove or disconnect the following:

    Intake air connector
     
    Positive Crankcase Ventilation (PCV) hoses
     
    Spark plug wires
     
    Engine wiring harness clamps and harness
     
    Air conditioning compressor connector, if equipped with air conditioning
     
    Oil pressure sensor connector
     
    Engine Coolant Temperature (ECT) sensor connector
     
    Distributor connector
     
    Cylinder head cover
     

  8.  
  9. Set the No. 1 cylinder to Top Dead Center (TDC) of the compression stroke, as follows:
    1. Turn the crankshaft pulley clockwise and align its groove with the 0 mark on the timing chain cover.
    2.  
    3. Check that the timing marks (1 and 2 dots) of the camshaft drive and driven gears are in a straight line on the cylinder head surface. If not, turn the crankshaft 1 revolution (360 degrees) and align the marks.
    4.  

  10.  
  11. Inspect the valve clearance, as follows:
    1. Measure the clearance between the valve lifter and the camshaft. Measure the 1st and 2nd intake and the 1st and 3rd exhaust valves.
    2.  
    3. Turn the crankshaft pulley 1 revolution (360 degrees) and align the marks as above. Measure the 3rd and 4th intake and the 2nd and 4th exhaust valves.
    4.  

  12.  
  13. Valve clearance cold should be:

    Intake: 0.006-0.010 in. (0.15-0.25mm)
     
    Exhaust: 0.010-0.014 in. (0.25-0.35mm)
     

  14.  
  15. Adjust the valve clearance by using adjusting shims, as follows:
    1. Turn the camshaft so the cam lobe for the valve to be adjusted faces up.
    2.  
    3. Using SST 09248-55040, press down the valve lifter and place SST 09248-05420, between the camshaft and the valve lifter. Remove SST 09248-55040.
    4.  
    5. Remove the adjusting shim with a small flat prying tool and a magnetic finger.
    6.  
    7. Determine the replacement adjusting shim size according to the following formula or use the adjusting shim charts.
    8.  
    9. Using a micrometer, measure the thickness of the removed shim. Calculate the thickness of a new shim so the valve clearance comes within the specified value.

      T: Thickness of the removed shim
       
      A: Measured valve clearance
       
      N: Thickness of the new shim
       

    10.  
    11. Intake: N = T + (A-0.008 in. (0.20mm))
    12.  
    13. Exhaust: N = T + (A-0.012 in. (0.30mm))
    14.  
    15. Install a new adjusting shim. Place it on the valve lifter. Using the SST 09248-55040, press down the valve lifter and remove SST 09248-05420.
    16.  
    17. Recheck the valve clearance.
    18.  

  16.  
  17. Install or connect the following:

    Cylinder head cover
     
    Engine wiring harness and clamps
     
    Distributor connector
     
    ECT sensor connector
     
    Oil pressure sensor connector
     
    Air conditioning compressor connector, if disconnected
     
    Spark plug wires
     
    PCV hoses
     
    Intake air connector
     
    Negative battery cable
     

  18.  
  19. Refill with engine coolant.
  20.  
  21. Check the ignition timing.
  22.  

3.0L & 3.3L Engines




NOTE
Adjust the valve clearance when the engine is cold.

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

    Negative battery cable. If equipped with an air bag, wait at least 90 seconds before proceeding.
     
    Accelerator/throttle cable from the throttle linkage
     
    Air cleaner cover, air flow meter and air duct assembly
     
    V-bank cover
     
    Emission control valve set
     
    Air intake chamber
     
    Engine harness from the injectors and the ignition coils
     
    Ignition coils and keep them in order for reassembly
     
    Spark plugs
     
    Cylinder head covers
     

  4.  
  5. Turn the crankshaft pulley and align its groove with the timing mark0
  6.  
  7. Check that the valve lifters on the No. 1 intake are loose and the No. 1 exhaust are tight. If not, turn the crankshaft 1 complete revolution (360 degrees).
  8.  


NOTE
All measurements should be written down. These recorded measurements will need to be used in conjunction with a mathematical formula to determine the thickness of the replacement shims.

  1. Measure the clearance between the valve lifters and the camshaft. Record the measurements on valves No. 1 and 6 intake; No. 2 and 3 exhaust.
    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.  



    Click image to see an enlarged view

    Fig. Adjust these valves during the 1st step

  2.  
  3. Turn the crankshaft23
  4.  
  5. Turn the crankshaft another23
  6.  
  7. Remove the adjusting shim by turning the crankshaft to position the cam lobe of the camshaft in the up position on the valve to be adjusted. Using a small thin flat bladed tool, turn the valve lifter so that the notches are perpendicular to the camshaft. Press down the valve lifter with tool 09248-55010 part A. Place too 09248-55010 part B between the camshaft and the valve lifter; remove part A.
  8.  
  9. Remove the adjusting shim with a magnet and a small screwdriver.
  10.  
  11. Determine the replacement adjusting shim size by either using the charts or the following formulas:

    Intake: N = T + (A - 0.008 in./0.020mm)
     
    Exhaust: N = T + (A - 0.012 in./0.30mm)
     
    T = Thickness of removed shim
     
    A = Measured valve clearance
     
    N = Thickness of new shim
     

  12.  
  13. Select a new shim with a thickness as close as possible to the calculated value. Install the new replacement shim.
  14.  


    Click image to see an enlarged view

    Fig. Adjust these valves during the 2nd step



    Click image to see an enlarged view

    Fig. Adjust these valves during the 3rd step



NOTE
Shims are available in 17 sizes in increments of 0.0020 in. (0.050mm), from 0.0984 in. (2.500mm) to 0.1299 in. (3.300mm).

  1. Recheck the valve clearance.
  2.  
  3. Install or connect the following:

    Cylinder head covers
     
    Spark plugs and the ignition coils
     
    Engine wiring harness to the injectors and the coils
     
    Intake chamber
     
    Emission control valve set
     
    V-bank cover
     
    Air flow meter, air duct and air cleaner cover
     
    Negative battery cable
     

  4.  

3.0L Engine




NOTE
Adjust the valve clearance when the engine is cold.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable. If equipped with an air bag, wait at least 90 seconds before proceeding.
     
    Accelerator/throttle cable from the throttle linkage
     
    Air cleaner cover, air flow meter and air duct assembly
     
    V-bank cover
     
    Emission control valve set
     
    Air intake chamber
     
    Engine harness from the injectors and the ignition coils
     
    Ignition coils and keep them in order for reassembly
     
    Spark plugs
     
    Cylinder head covers
     

  4.  
  5. Turn the crankshaft pulley and align its groove with the timing mark 0 of the No. 1 timing cover.
  6.  
  7. Check that the valve lifters on the No. 1 intake are loose and the No. 1 exhaust are tight. If not, turn the crankshaft 1 complete revolution (360 degrees).
    NOTE
    All measurements should be written down. These recorded measurements will need to be used in conjunction with a mathematical formula to determine the thickness of the replacement shims.

  8.  
  9. Measure the clearance between the valve lifters and the camshaft. Record the measurements on valves No. 1 and 6 intake; No. 2 and 3 exhaust.

    Click image to see an enlarged view

    Fig. Adjust these valves during the 1st step-3.0L

    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.  

  10.  
  11. Turn the crankshaft 2 / 3 of a revolution (240 degrees). Record the measurements on valves No. 2 and 3 intake; No. 4 and 5 exhaust.

    Click image to see an enlarged view

    Fig. Adjust these valves during the 2nd step-3.0L

  12.  
  13. Turn the crankshaft another 2 / 3 of a revolution. Record the measurements on valves No. 4 and 5 intake; No. 1 and 6 exhaust.

    Click image to see an enlarged view

    Fig. Adjust these valves during the 3rd step-3.0L

  14.  
  15. Remove the adjusting shim by turning the crankshaft to position the cam lobe of the camshaft in the up position on the valve to be adjusted. Using a small thin flat bladed tool, turn the valve lifter so that the notches are perpendicular to the camshaft. Press down the valve lifter with tool 09248-55010 part A. Place too 09248-55010 part B between the camshaft and the valve lifter; remove part A.
  16.  
  17. Remove the adjusting shim with a magnet and a small screwdriver.
  18.  
  19. Determine the replacement adjusting shim size by either using the charts or the following formulas:

    Intake: N = T + (A - 0.008 in./0.020mm)
     
    Exhaust: N = T + (A - 0.012 in./0.30mm)
     
    T = Thickness of removed shim
     
    A = Measured valve clearance
     
    N = Thickness of new shim
     

  20.  
  21. Select a new shim with a thickness as close as possible to the calculated value. Install the new replacement shim.
    NOTE
    Shims are available in 17 sizes in increments of 0.0020 in. (0.050mm), from 0.0984 in. (2.500mm) to 0.1299 in. (3.300mm).

  22.  
  23. Recheck the valve clearance.
  24.  
  25. Install or connect the following:

    Cylinder head covers
     
    Spark plugs and the ignition coils
     
    Engine wiring harness to the injectors and the coils
     
    Intake chamber
     
    Emission control valve set
     
    V-bank cover
     
    Air flow meter, air duct and air cleaner cover
     
    Negative battery cable
     

  26.  

3.4L Engine



  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Drain the engine coolant.
  6.  
  7. Remove or disconnect the following:

    Air intake connector
     
    Cylinder head cover

    Click image to see an enlarged view

    Fig. Aligning the timing marks-3.4L engine

     

  8.  
  9. Set the No. 1 cylinder to Top Dead Center (TDC) of the compression stroke, as follows:
    1. Turn the crankshaft pulley clockwise and align its groove with the 0 mark on the timing chain cover.
    2.  
    3. Check that the timing marks (1 and 2 dots) of the camshaft drive and driven gears are in a straight line on the cylinder head surface. If not, turn the crankshaft 1 revolution (360 degrees) and align the marks.

      Click image to see an enlarged view

      Fig. First valve adjustment-3.4L engine



      Click image to see an enlarged view

      Fig. Second valve adjustment-3.4L engine



      Click image to see an enlarged view

      Fig. Third valve adjustment-3.4L engine

    4.  

  10.  
  11. Inspect the valve clearance, as follows:
    1. Measure the clearance between the valve lifter and the camshaft. Measure the 1st intake and the 3rd exhaust valves on the right head and the 6th intake and the 2nd exhaust valves on the left head.
    2.  
    3. Turn the crankshaft 2 / 3 of a revolution (240 degrees) and adjust the 3rd intake and the 5th exhaust valves on the right head and the 2nd intake and the 4th exhaust valves on the left head.
    4.  
    5. Turn the crankshaft 2 / 3 of a revolution (240 degrees) and adjust the 5th intake and the 1st exhaust valves on the right head and the 4th intake and the 6th exhaust valves on the left head.
    6.  

  12.  
  13. Valve clearance cold should be:

    Intake: 0.006-0.009 in. (0.13-0.23mm)
     
    Exhaust: 0.011-0.014 in. (0.27-0.37mm)

    Click image to see an enlarged view

    Fig. Removing the adjusting shim-3.4L engine

     

  14.  
  15. Adjust the valve clearance by using adjusting shims, as follows:
    1. Turn the equipment camshaft so that the cam lobe for the valve to be adjusted faces up.
    2.  
    3. Turn the valve lifter so that the notches are perpendicular to the camshaft.
    4.  
    5. Using SST 09248-55040, press down the valve lifter and place SST 09248-05420, between the camshaft and the valve lifter. Remove SST 09248-55040.
    6.  
    7. Remove the adjusting shim with a small flat prying tool and a magnetic finger.
    8.  
    9. Determine the replacement adjusting shim size according to the following formula or use the adjusting shim charts.
    10.  
    11. Using a micrometer, measure the thickness of the removed shim. Calculate the thickness of a new shim so that the valve clearance comes within the specified value.

      T: Thickness of the removed shim
       
      A: Measured valve clearance
       
      N: Thickness of the new shim
       

    12.  
    13. Intake: N = T + (A-0.007 in. (0.18mm))
    14.  
    15. Exhaust: N = T + (A-0.013 in. (0.32mm))
    16.  
    17. Install a new adjusting shim. Place it on the valve lifter. Using the SST 09248-55040, press down the valve lifter and remove SST 09248-05420.
    18.  
    19. Recheck the valve clearance.
    20.  

  16.  
  17. Install or connect the following:

    Cylinder head cover
     
    Intake air connector
     
    Negative battery cable
     

  18.  
  19. Refill with engine coolant.
  20.  
  21. Start the engine and check for leaks.
  22.  

 
label.common.footer.alt.autozoneLogo