Toyota 4Runner 2001-06

Valve Lash (Clearance) Adjustment 1

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1gr-FE Engine



  1. Remove the valve cover.
  2.  
  3. Turn the crankshaft clockwise and align its groove with the -0- mark on the timing cover.

    Click image to see an enlarged view

    Fig. Turn the crankshaft clockwise and align its groove with the -0- mark on the timing cover-4.0L (1GR-FE) Engine

  4.  
  5. Check that the timing marks on the camshaft sprockets are aligned with the timing marks on the bearings caps, as shown. If not, rotate the crankshaft 360 degrees clockwise.

    Click image to see an enlarged view

    Fig. Check that the timing marks on the camshaft sprockets are aligned with the timing marks on the bearings caps-4.0L (1GR-FE) Engine

  6.  
  7. Check the valve clearance for the valves shown in Figure A. Clearance should be:

    Intake: 0.006-0.010 in. (0.15-0.25mm)
     
    Exhaust: 0.011-0.015 inch (0.29-0.39mm)

    Click image to see an enlarged view

    Fig. Valve clearance check, Figure A-4.0L (1GR-FE) Engine

     

  8.  
  9. If any are not correct, record how far off they are. This will determine replacement lifter(s).
  10.  
  11. Turn the crankshaft 2 / 3 turn (240 degrees) clockwise. Check the valves shown in Figure B.

    Click image to see an enlarged view

    Fig. Valve clearance check, Figure B-4.0L (1GR-FE) Engine

  12.  
  13. If any are not correct, record how far off they are. This will determine replacement lifter(s).
  14.  
  15. Turn the crankshaft 2 / 3 turn (240 degrees) clockwise. Check the valves shown in Figure C.

    Click image to see an enlarged view

    Fig. Valve clearance check, Figure C-4.0L (1GR-FE) Engine

  16.  
  17. If any are not correct, record how far off they are. This will determine replacement lifter(s).
  18.  
  19. If adjustment is necessary, remove the camshaft(s).
  20.  
  21. Remove the lifters to be replaced. Measure the lifter at the points shown.

    Click image to see an enlarged view

    Fig. Measure the lifter at these points-4.0L (1GR-FE) Engine

  22.  
  23. Determine the size of the replacement lifter using the accompanying charts. Lifters are available in 35 sizes, in increments of 0.020mm, from 5.060mm to 5.740mm.

    Click image to see an enlarged view

    Fig. Intake valve lifter selection chart-4.0L engine



    Click image to see an enlarged view

    Fig. Exhaust valve lifter selection chart-4.0L engine

  24.  
  25. Install the camshaft(s).
  26.  
  27. The remainder of installation is the reverse of removal.
  28.  

2RZ-FE And 3RZ-FE Engines



Toyota's Valve Adjustment Special Service Tools (SST), or their equivalent, are required for this procedure. The valve adjusting shims are set inside bucket-like cam followers. Part of the Toyota SST Valve Adjust Tool Set is a pliers-like tool to press down on the cam follower (also called a valve lifter) for enough clearance to withdraw the shim, and a lever-like tool that fits between the camshaft and the valve lifter flange to hold that clearance for shim extraction and insertion. In addition, a magnet to remove the adjustment shim from the cam follower and an accurate micrometer is required to properly measure the valve shim thickness. If all of these items are not available, valve adjustment is NOT recommended.

Only adjust the valve clearance when the engine is cold.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the cylinder head (valve) cover.
  4.  
  5. Turn the crankshaft pulley clockwise and align its groove with the timing mark 0 of the timing chain cover. If all of the spark plugs are removed, it will be easier to turn the engine by hand.
  6.  



Click image to see an enlarged view

Fig. Align the timing marks at the crankshaft pulley. Verify that the marks (one and two dots) on the camshaft drive and driven gears are in a straight line-2RZ-FE and 3RZ-FE Engines

  1. Check that the timing marks (one and two dots) on the camshaft drive and driven gears are in a straight line on the cylinder head surface. If not, turn the crankshaft one complete revolution (360 degrees). This should be Top Dead Center (TDC) for cylinder No. 1.
  2.  
  3. Using an accurate feeler gauge, measure the clearance between the valve lifter and the camshaft. Record the measurements on the intake valves on cylinder No. 1 and 2. Measure the exhaust valves at cylinder No. 1 and 3.
    1. The intake valve clearance cold should be 0.006-0.010 in. (0.15-0.25mm).
    2.  
    3. The exhaust valve clearance cold should be 0.010-0.014 in. (0.25-0.35mm).
    4.  

  4.  
  5. Turn the crankshaft pulley exactly 1 complete revolution (360 degrees) and align the pulley groove with the timing mark 0 on the timing chain cover. This should now be Top Dead Center for cylinder No. 4.
  6.  



Click image to see an enlarged view

Fig. Intake valves No. 1 and 2 and exhaust valves No. 1 and 3-2RZ-FE and 3RZ-FE Engines



Click image to see an enlarged view

Fig. Intake valves No. 3 and 4 and exhaust valves No. 2 and 4-2RZ-FE and 3RZ-FE Engines

  1. Measure the clearance between the valve lifter and the camshaft. Record the measurements on the intake valves for cylinder No. 3 and 4. Measure the exhaust valves at the cylinder No. 2 and 4.
    1. The intake valve clearance cold should be 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.  

  2.  



Click image to see an enlarged view

Fig. Turn the crankshaft clockwise to position the cam lobe of the valve to be adjusted, upward. Rotate the notch in the valve lifter to face the spark plug side-2RZ-FE and 3RZ-FE Engines

  1. To adjust the intake valve clearance:
    1. Turn the crankshaft to position the cam lobe of the valve to be adjusted, facing upward.
    2.  
    3. Look closely for a notch in the valve lifter. Position the notch of the valve lifter toward the spark plug side.
    4.  
    5. Using the pliers-like Toyota SST tool, press down on the valve lifter and place the lever-like part of the SST valve adjusting tool set between the camshaft and valve lifter flange. The tip on the lever should fit into the notch in the valve lifter. With the valve lifter retained in this way, remove the pliers-like tool.
    6.  
    7. Using a small flat-bladed tool and a magnet, remove the adjusting shim.
    8.  
    9. Using an accurate micrometer, measure the thickness of the removed shim.
    10.  
    11. Calculate the thickness of a new shim so that the valve clearance comes within the specified value. Determine the replacement adjusting shim size by either using the chart or the following formula:

      Intake-N=T+(A-0.008 in./0.20mm)
       
      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.
    14.  

  2.  
  3. Place a new adjusting shim on the valve lifter. Using the pliers-like Special Service Tool, press down on the valve lifter and remove the lever-like tool.
  4.  
  5. With feeler gauges, recheck the valve clearance.
  6.  



Click image to see an enlarged view

Fig. These special tools are required for valve adjustment



Click image to see an enlarged view

Fig. Apply the SST (B ) at a slight angle on the side marked with a 9, at the position shown in the illustration-2RZ-FE and 3RZ-FE Engines

  1. The same procedures and tools are used for both intake and exhaust valve lifter adjustment.
  2.  
  3. When satisfied that all lifter clearances are correct, reinstall the cylinder head (valve) cover.
  4.  
  5. Connect the spark plug wires and any wiring removed or displaced for cylinder head cover removal.
  6.  
  7. Connect the remaining components such as PCV hoses and intake air connector.
  8.  
  9. Check engine oil level and connect the negative battery cable.
  10.  

2UZ-FE Engine





Drain the coolant.
 
Remove the battery ground cable.
 
Remove the throttle body cover.
 
Remove the air cleaner.
 
Remove the radiator upper support seal.
 
Remove the accessory drive belt.
 
Remove the oil cooler pipe.
 
Remove the timing belt covers.
 
Remove the cylinder head covers.
 
Turn the crankshaft clockwise and align its groove with the -0- mark on the timing cover.
 
Check that the timing marks on the camshaft sprockets are aligned with the timing marks on the bearings caps, as shown. If not, rotate the crankshaft 360 degrees clockwise.
 
Check the valve clearance on the valves indicated in Figure A. Valve clearance should be:
  1. Intake: 0.006-0.010 inch (0.15-0.25mm)
  2.  
  3. Exhaust: 0.010-0.014 inch (0.25-0.35mm)
  4.  

 
If any valve is not within specifications, record how far out it is. This will determine the replacement shim.
 
Turn the crankshaft 1 full turn (360 degrees) clockwise.
 
Check the valve clearance on the valves indicated in Figure B. Valve clearance should be:

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

 
If any valve is not within specifications, record how far out it is. This will determine the replacement shim.
 
If any valve requires adjustment, remove the camshaft(s).
 
Remove the lifter(s) and shims to be replaced. Using a micrometer, measure the shim thickness. Use the accompanying charts to determine the size of the new shim. Shims are available in 41 sizes in increments of 0.020mm from 2.00mm to 2.80mm.
 
Once all out of specification shims are replaced, install the camshafts.
 
The remainder of installation is the reverse of removal.
 


Click image to see an enlarged view

Fig. Turn the crankshaft clockwise and align its groove with the -0- mark on the timing cover-4.7L engine



Click image to see an enlarged view

Fig. Check that the timing marks on the camshaft sprockets are aligned with the timing marks on the bearings caps-4.7L engine



Click image to see an enlarged view

Fig. Valve clearance check, Figure A-4.7L engine



Click image to see an enlarged view

Fig. Valve clearance check, Figure B-4.7L engine



Click image to see an enlarged view

Fig. Intake valve shim selection chart-4.7L engine



Click image to see an enlarged view

Fig. Exhaust valve shim selection chart-4.7L engine


  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove the battery ground cable.
  6.  
  7. Remove the throttle body cover.
  8.  
  9. Remove the air cleaner.
  10.  
  11. Remove the radiator upper support seal.
  12.  
  13. Remove the accessory drive belt.
  14.  
  15. Remove the oil cooler pipe.
  16.  
  17. Remove the timing belt covers.
  18.  
  19. Remove the cylinder head covers.
  20.  
  21. Turn the crankshaft clockwise and align its groove with the -0- mark on the timing cover.

    Click image to see an enlarged view

    Fig. Turn the crankshaft clockwise and align its groove with the -0- mark on the timing cover-4.7L (2UZ-FE) Engine

  22.  
  23. Check that the timing marks on the camshaft sprockets are aligned with the timing marks on the bearings caps, as shown. If not, rotate the crankshaft 360 degrees clockwise.

    Click image to see an enlarged view

    Fig. Check that the timing marks on the camshaft sprockets are aligned with the timing marks on the bearings caps-4.7L (2UZ-FE) Engine

  24.  
  25. Check the valve clearance on the valves indicated in Figure A. Valve clearance should be:

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

    Click image to see an enlarged view

    Fig. Valve clearance check, Figure A-4.7L (2UZ-FE) Engine

     

  26.  
  27. If any valve is not within specifications, record how far out it is. This will determine the replacement shim.
  28.  
  29. Turn the crankshaft 1 full turn (360 degrees) clockwise.
  30.  
  31. Check the valve clearance on the valves indicated in Figure B. Valve clearance should be:

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

    Click image to see an enlarged view

    Fig. Valve clearance check, Figure B-4.7L (2UZ-FE) Engine

     

  32.  
  33. If any valve is not within specifications, record how far out it is. This will determine the replacement shim.
  34.  
  35. If any valve requires adjustment, remove the camshaft(s).

    Click image to see an enlarged view

    Fig. Intake valve shim selection chart-4.7L (2UZ-FE) Engine



    Click image to see an enlarged view

    Fig. Exhaust valve shim selection chart-4.7L (2UZ-FE) Engine

  36.  
  37. Remove the lifter(s) and shims to be replaced. Using a micrometer, measure the shim thickness. Use the accompanying charts to determine the size of the new shim. Shims are available in 41 sizes in increments of 0.020mm from 2.00mm to 2.80mm.
  38.  
  39. Once all out of specification shims are replaced, install the camshafts.
  40.  
  41. The remainder of installation is the reverse of removal.
  42.  

 
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