Toyota Camry 1983-1996 Repair Guide

Valve Lash

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GENERAL INFORMATION



Check and adjust the valve clearance every 60,000 miles or 72 months.

Valve clearance is one factor which determines how far the intake and exhaust valves will open into the cylinder. If the valve clearance is too large, part of the lift of the camshaft will be used up in removing the excessive clearance, thus the valves will not be opened far enough. This condition has two effects, the valve train components will emit a tapping noise as they take up the excessive clearance, and the engine will perform poorly, since the less the intake valve opens, the smaller the amount of air/fuel mixture that will be admitted to the cylinders. The less the exhaust valves open, the greater the back-pressure in the cylinder which prevents the proper air/fuel mixture from entering the cylinder.

If the valve clearance is too small, the intake and exhaust valves will not fully seat on the cylinder head when they close. When a valve seats on the cylinder head it does two things, it seals the combustion chamber so none of the gases in the cylinder can escape and it cools itself by transferring some of the heat it absorbed from the combustion process through the cylinder head and into the engine cooling system. Therefore, if the valve clearance is too small, the engine will run poorly due to gases escaping from the combustion chamber, and the valves will overheat and warp since they cannot transfer heat unless they are touching the seat in the cylinder head.

ADJUSTMENT



2S-ELC Engine

These engines are equipped with hydraulic valve adjusters in the valve train. The adjusters automatically maintain a zero valve clearance between the rocker arm and valve stem and no periodic adjustment is possible or necessary. The best way to maintain hydraulic lash adjusters is through regular and frequent oil filter changes.

1C-LTC and 2C-LTC Engines

See Figures 1, 2, 3, 4 and 5

Adjust the valve clearance when the engine is cold.

  1. Remove the valve covers, discard the gaskets and nut seals.
  2.  
  3. With a socket wrench, turn the crankshaft pulley unit the notch in the pulley aligns with the timing pointer on the front cover. The engine will now be at TDC of the No. 1 cylinder. The lifters on the No. 1 cylinder should be loose, and both those on the No. 4 should be tight. If not turn the crankshaft one complete revolution (360°) and then realign the marks.
  4.  



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Fig. Fig. 1: Setting the No. 1 cylinder to TDC-1C-LTC and 2C-LTC engines

  1. Using a feeler gauge, measure the gap between the lifter and the camshaft lobe on each valve of the No. 1 cylinder. Then check each valve shown in the illustration. If the clearance is not within specifications, note what it is and write it down on a piece of paper. the readings will be used later to determine the proper adjustment. shims.
  2.  
  3. Turn the crankshaft 360°, in the direction of normal rotation, then align the pointer and notch. Measure the clearance on the valves marked in the illustration.
  4.  



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Fig. Fig. 2: Adjust these valves in the first pass-1C-LTC and 2C-LTC engines



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Fig. Fig. 3: Adjust these valves in the second pass-1C-LTC and 2C-LTC engines

  1. If all the valve measurements were within specifications, you need to go no further. If not, record the measurements on a piece of paper and proceed to Step 7 to begin the valve adjustment procedure.
  2.  
  3. Turn the crankshaft so that the intake lobe of camshaft on any cylinder in need of adjustment, is pointing straight up. both valves on that cylinder may now be adjusted.
  4.  
  5. Using a small screwdriver, turn the lifter so that the notch is easily assessable.
  6.  
  7. Install a depressor, SST 09248-64010 or equivalent, between the two lobes and turn the handle so that the tool presses down both lifters evenly.
  8.  



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Fig. Fig. 4: Using the depressor service tool-1C-LTC and 2C-LTC engines

  1. Using a small screwdriver and a finger magnet, remove the shims.
  2.  
  3. Using the accompanying shim selection chart, measure the thickness of the old shim and locate the previously recorded gap measurement in the chart. Index the two columns to determine the new shim thickness.
  4.  



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Fig. Fig. 5: Shim selection formula-1C-LTC and 2C-LTC engines

  1. Install the new shims and remove the tool. Recheck the valve clearance.
  2.  
  3. Repeat this procedure for each affected valve.
  4.  
  5. Install the valve cover using new gaskets and seal washers. Tighten the nuts to 65 inch lbs. (9 Nm).
  6.  
  7. Start the vehicle and check for operation. Top off the engine oil if necessary.
  8.  

3S-FE and 5S-FE Engines

See Figures 6, 7, 8, 9, 10, 11, 12 and 13

The use of the correct special tools or their equivalent is REQUIRED for this procedure. The valve adjustment requires removal of the adjusting shims (Tool kit J-37141 available from Kent-Moore Tool or a Toyota equivalent No. 09248-55010, 09248-55020 or 09248-55040) and accurate measurement of the shims with a micrometer. A selection of replacement shims (refer to parts department of your Toyota dealer) is also required. Do not attempt this procedure if you are not equipped with the proper tools. Valves on these engines are adjusted with the engine cold. Do not attempt adjustment if the engine has been run within the previous 4 hours. An overnight cooling period is recommended.

  1. Remove the spark plug wires from the valve cover.
  2.  
  3. Remove the valve cover following procedures discussed in Engine & Engine Rebuilding .
  4.  
  5. Turn the crankshaft to align the groove in the crankshaft pulley with the 0 mark on the timing belt cover. Removing the spark plugs makes this easier, but is not required.
  6.  



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Fig. Fig. 6: Turn the crankshaft pulley and align its groove with the timing mark on 0 of the No. 1 timing cover

  1. Check that the lifters on No.1 cylinder are loose and those on No.4 are tight. If not, turn the crankshaft pulley one full revolution (360°).
  2.  
  3. Using the feeler gauge, measure the clearance on the valves in the positions shown in the diagram labeled First Pass. Make a written record of any measurements which are not within specification.
  4.  



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Fig. Fig. 7: Check these valves in the first pass only-3S-FE and 5S-FE engines

  1. Rotate the crankshaft pulley one full turn (360°) and check the clearance on the other valves. The positions are shown on the diagram labeled Second Pass. Any measurements not within specification should be added to your written record.
  2.  



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Fig. Fig. 8: Check these valves in the second pass only-3S-FE and 5S-FE engines



Intake clearance COLD: 0.007-0.011 inch (0.19-0.29mm)
 
Exhaust clearance COLD: 0.011-0.015 inch (0.28-0.38mm)
 

  1. For ANY given valve needing adjustment:
  2.  



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Fig. Fig. 9: Press down the valve lifter with SST-A and hold the lifter down with SST-B



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Fig. Fig. 10: Remove the adjusting shim with a flatbladded tool and a magnetic finger

    1. Turn the crankshaft pulley until the camshaft lobe points upward over the valve. This takes the tension off the valve and spring.
    2.  
    3. Using the forked tool (SST-A), press the valve lifter downward and hold it there. Some tool kits require a second tool for holding the lifter in place (SST-B), allowing the first to be removed.
    4.  
    5. Using small magnetic tools, remove the adjusting shim from the top of the lifter.
    6.  
    7. Use the micrometer and measure the thickness of the shim removed. Determine the thickness of the new shim using the formula below or the selection charts. For the purposes of the following formula, T = Thickness of the old shim; A = Valve clearance measured; N = Thickness of the new shim

      Intake side (camshaft nearest intake manifold): N = T + (A - 0.009 inch (0.24mm))
       
      Exhaust side (camshaft nearest exhaust manifold): N = T + (A - 0.013 inch (0.33mm))
       

    8.  




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Fig. Fig. 11: Using a micrometer, measure the removed adjusting shim size



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Fig. Fig. 12: Shim selection chart (intake)-3S-FE and 5S-FE engines



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Fig. Fig. 13: Shim selection chart (exhaust)-3S-FE and 5S-FE engines

  1. Select a shim closest to the calculated thickness. Use the lifter depressor tool to press down the lifter and install the shim. Shims are available in 17 sizes from 0.0984-0.1299 inch (2.50mm-3.30mm). The standard increment is 0.0020 inch (0.05mm).
  2.  
  3. Repeat steps a through e for each valve needing adjustment.
  4.  
  5. Reinstall the valve cover, following the procedures outlined in Engine & Engine Rebuilding .
  6.  
  7. Install the spark plug wires.
  8.  
  9. Check and adjust the timing and idle speed, following the procedures outlined in this section. Road test the vehicle for proper operation.
  10.  

2VZ-FE and 3VZ-FE Engines

See Figures 14, 15, 16, 17, 9, 11, 18 and 19

Adjust the valve clearance when the engine is cold.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air intake chamber.
  4.  
  5. Remove the cylinder head cover as described in Engine & Engine Rebuilding .
  6.  
  7. Turn the crankshaft to align the groove in the crankshaft pulley with the 0 mark on the timing belt cover. Removing the spark plugs makes this easier, but is not required.
  8.  
  9. Check that the lifters on No.1 intake are loose and those on No. 1 exhaust are tight. If not, turn the crankshaft pulley one full revolution (360°).
  10.  



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Fig. Fig. 14: Turn the crankshaft to align the groove in the crankshaft pulley with the 0 mark

  1. Using the feeler gauge, measure the clearance on the valves in the positions shown in the diagram
  2.  

labeled First Pass. Make a written record of any measurements which are not within specification.

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Fig. Fig. 15: Check these valves in the first pass only-2VZ-FE and 3VZ-FE engines

  1. Rotate the crankshaft pulley 2 / 3 turn (240°) and check the clearance on the other valves. The positions are shown on the diagram labeled Second Pass. Any measurements not within specification should be added to your written record.
  2.  



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Fig. Fig. 16: Check these valves in the second pass only-2VZ-FE and 3VZ-FE engines

  1. Turn the crankshaft a further 2 / 3 turn (240°), and check only the valves indicated in the Third pass. Measure the valve clearance.
  2.  



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Fig. Fig. 17: Check these valves in the third pass only-2VZ-FE and 3VZ-FE engines

  1. Turn the crankshaft to position the cam lobe of the camshaft on the adjusting valve upward. press down the valve lifter with SST 09248-55011 (A), then place SST 09248-55021 (B) between the camshaft and the valve lifter. Remove SST tool (A). Before pressing down on the valve lifter, position the notch toward the spark plug. Remove the adjusting shim with a small screwdriver and magnetic finger.
  2.  
  3. Determine the replacement adjusting shim size by following the formulas or charts. For the purposes of the following formula, T = Thickness of the old shim; A = Valve clearance measured; N = Thickness of the new shim

    Intake side (camshaft nearest intake manifold): N = T + (A - 0.007 inch [0.19mm])
     
    Exhaust side (camshaft nearest exhaust manifold): N = T + (A - 0.013 inch [0.32mm])
     

  4.  
  5. Select a shim closest to the calculated thickness. Use the lifter depressor tool to press down the lifter and install the shim. Shims are available in 17 sizes from 0.0984-0.1299 inch (2.50mm-3.30mm). The standard increment is 0.0020 in. (0.05mm).
  6.  
  7. Repeat the previous steps for each valve needing adjustment.
  8.  



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Fig. Fig. 18: Shim selection chart (intake)-2VZ-FE and 3VZ-FE engines



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Fig. Fig. 19: Shim selection chart (exhaust)-2VZ-FE and 3VZ-FE engines

  1. Reinstall the valve cover, using all new gaskets following the procedures outlined in Engine & Engine Rebuilding .
  2.  
  3. Install the air intake chamber as outlined in Engine & Engine Rebuilding .
  4.  
  5. Connect the negative battery cable.
  6.  
  7. Check and adjust the timing and idle speed, following the procedures outlined in this section. Road test the vehicle for proper operation.
  8.  

1MZ-FE Engine

See Figures 20, 21, 22, 23, 24, 11, 25 and 26

Inspect and adjust the valve clearance while the engine is cold.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the right side fender apron seal.
  4.  
  5. Drain the engine coolant.
  6.  
  7. Remove the valve bank cover using a 5mm wrench.
  8.  
  9. Remove the spark plug wires from the valve cover.
  10.  
  11. Remove the air intake chamber assembly, refer to Engine & Engine Rebuilding .
  12.  
  13. Remove the ignition coils. Make sure to arrange them in the order of removal.
  14.  
  15. Disconnect the radiator hose from the water outlet.
  16.  
  17. Remove the valve cover and gasket as described in Engine & Engine Rebuilding .
  18.  
  19. Set the No. 1 cylinder to TDC by turning the crankshaft pulley and align its groove with the timing mark "0" of the No. 1 timing cover. Check that the valve lifters on the No. 1 intake and exhaust are loose. If not, turn the crankshaft one revolution (360°) and align the mark.
  20.  
  21. Using the feeler gauge, measure the clearance on the valves in the positions shown in the diagram
  22.  

labeled first pass. Make a written record of any measurements which are not within specification.



Intake COLD: 0.006-0.010 in. (0.15-0.25mm)
 
Exhaust COLD: 0.010-0.014 in. 90.25-0.35mm)
 



Click image to see an enlarged view

Fig. Fig. 20: Check these valves in the first pass only-1MZ-FE engine

  1. Rotate the crankshaft pulley 2 / 3 turn (240°) and check the clearance on the other valves. The positions are shown on the diagram labeled second pass. Any measurements not within specification should be added to your written record.
  2.  



Click image to see an enlarged view

Fig. Fig. 21: Check these valves in the second pass only-1MZ-FE engine

  1. Turn the crankshaft a further 2 / 3 turn (240°), and check only the valves indicated in the third pass. Measure the valve clearance.
  2.  



Click image to see an enlarged view

Fig. Fig. 22: Check these valves in the third pass only-1MZ-FE engine

  1. To remove the adjusting shim, turn the camshaft so that the cam lobe for the valve to be adjusted faces up. Turn the valve lifter with a screwdriver so that the notches are perpendicular to the camshaft. Using SST (A) 09278-05410 or equivalent, press down the valve lifter and place the SST (B) 09248-05420 between the camshaft and valve lifter. Remove SST (A).
  2.  



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Fig. Fig. 23: Turn the camshaft so that the cam lobe for the valve to be adjusted faces upward-1MZ-FE engine

  1. Apply SST (B) 09248-05420 or equivalent at a slight angle on the side marked with 9 or 7 at the position shown in the illustration. When the SST (B) is inserted too deeply, it will get pinched by the shim. To prevent it from being stuck, insert it gently from the intake side, at a slight angle.
  2.  



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Fig. Fig. 24: When installing the new shim, apply SST (B) at a slight angle on the side that is marked at the position shown-1MZ-FE engine

  1. Remove the adjusting shim with a small flat bladed tool and magnetic finger.
  2.  
  3. Determine the replacement adjusting shim size according to the formula or charts. For the purposes of the following formula, T = Thickness of the old shim; A = Valve clearance measured; N = Thickness of the new shim

    Intake side (camshaft nearest intake manifold): N = T + (A -; 0.007 inch (0.19mm))
     
    Exhaust side (camshaft nearest exhaust manifold): N = T + (A -; 0.013 inch (0.32mm))
     

  4.  
  5. Select a shim closest to the calculated thickness. Use the lifter depressor tool to press down the lifter and install the shim. Shims are available in 17 sizes from 0.0984-0.1299 inch (2.50mm-3.30mm). The standard increment is 0.0020 in. (0.05mm).
  6.  
  7. Install the new adjusting shim on the valve lifter. Place a new shim on the valve lifter with the numbers facing down. Using the SST-A or equivalent, press down the valve lifter and remove SST-B.
  8.  
  9. Recheck the valve clearance.
  10.  
  11. Install the valve cover. Attach the radiator hose to the water outlet.
  12.  
  13. Install the ignition coils. Make sure they are in the exact places where they were removed from.
  14.  
  15. Install the air intake chamber assembly, refer to Engine & Engine Rebuilding .
  16.  
  17. Attach the valve bank cover. Fill the engine coolant system.
  18.  
  19. Connect the negative battery cable.
  20.  
  21. Start the engine and top off the coolant level. install the right hand fender apron seal..
  22.  



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Fig. Fig. 25: Shim selection chart (intake)-1MZ-FE engine



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Fig. Fig. 26: Shim selection chart (exhaust)-1MZ-FE engine

 
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