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Valve Clearance

  1. Check and adjust valve clearance with engine cold. Remove necessary components to access valve covers. Remove valve covers and gaskets. Rotate crankshaft pulley in direction of engine rotation so crankshaft pulley groove aligns with "0" mark on timing belt cover and cylinder No. 1 is at TDC on compression stroke.
  2. Ensure cylinder No. 1 intake and exhaust valve lifters are loose. Cylinder No. 1 is front cylinder on right side, viewed from flywheel end of engine. See Fig 4. If valve lifters are not as described, rotate crankshaft 360 degrees in direction of engine rotation and realign crankshaft pulley groove with "0" mark on timing belt cover.
  3. Using feeler gauge, measure valve clearance between valve lifter and camshaft lobe. Measure and record valve clearance of intake valves on cylinders No. 1 and 6, and exhaust valves on cylinders No. 2 and 3. See Fig 4.
    Fig 1: Removing/Installing Typical Valve Clearance Adjusting Shim
    G94G44236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Intake Valve Adjusting Shim Selection Chart
    G96G09517Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 3: Exhaust Valve Adjusting Shim Selection Chart
    G96I09518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying Valve Arrangement
    G94J44247Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Rotate crankshaft pulley an additional 240 degrees (2/3 revolution) in direction of engine rotation. Measure and record valve clearance of intake valves on cylinders No. 2 and 3 and exhaust valves on cylinders No. 4 and 5.
  5. Rotate crankshaft pulley an additional 240 degrees (2/3 revolution) in direction of engine rotation. Measure and record valve clearance of intake valves on cylinders No. 4 and 5 and exhaust valves on cylinders No. 1 and 6.
  6. Ensure valve clearance is within specification. See VALVE CLEARANCE SPECIFICATIONS  table.
    VALVE CLEARANCE SPECIFICATIONS

    Application (1) In. (mm)
    Intake .006-.010 (.15-.25)
    Exhaust .010-.014 (.25-.35)
    (1) Adjust valve clearance with engine cold.
  7. If valve clearance adjustment is required, rotate crankshaft pulley so camshaft lobe is facing upward on valve to be adjusted. Rotate valve lifter so notch area on valve lifter is at 90-degree angle to camshaft. This will place notch area perpendicular to camshaft.
  8. Valve Clearance Adjuster (SST 09248-55040) is used for adjusting valve clearance. Press valve lifter downward using SST "A" of valve clearance adjuster. See Fig 1. Install SST "B" between camshaft and valve lifter. Remove SST "A".
  9. Using small screwdriver and magnet, remove adjusting shim. Using micrometer, measure thickness of removed adjusting shim.
  10. Using measured clearance and adjusting shim thickness, determine correct thickness of adjusting shim to be used. See Fig 2 and Fig 3.
  11. Install proper adjusting shim with imprinted numbers on adjusting shim facing downward, toward valve lifter. Using SST "A", press downward on valve lifter and remove SST "B". Recheck valve clearance.
  12. Apply sealant at camshaft bearing cap-to-cylinder head surfaces and semi-circular plug-to-cylinder head surfaces where valve cover gasket seals with semi-circular plugs. Install valve covers using NEW gaskets.
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