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Valve Clearance: Adjustment

WARNING: This page is about a different variant/trim than selected.
  1. REMOVE ENGINE UNDER COVER RH 
  2. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY  (See REMOVAL )
  3. REMOVE IGNITION COIL ASSEMBLY  (See REMOVAL )
  4. REMOVE SPARK PLUG  (See REMOVAL )
  5. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY  (See REMOVAL )
  6. SET NO. 1 CYLINDER TO TDC/COMPRESSION  (See REMOVAL )
  7. CHECK VALVE CLEARANCE 
    1. Check only the valves indicated in the illustration.
      1. Using a feeler gauge, measure the clearance between the valve lifter and camshaft.

        Standard Valve Clearance (Cold) 

        ITEM SPECIFIED CONDITION CHART

        Item Specified Condition
        Intake 0.19 to 0.29 mm (0.00748 to 0.0114 in.)
        Exhaust 0.38 to 0.48 mm (0.0150 to 0.0189 in.)
      2. Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve clearance lifters.
        Fig 1: Identifying Valve Lifters
        G04973933Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the crankshaft 1 revolution (360°) and set the No. 4 cylinder to TDC/compression.
    3. Check only the valves indicated in the illustration.
      1. Using a feeler gauge, measure the clearance between the valve lifter and camshaft.

        Standard Valve Clearance (Cold) 

        ITEM SPECIFIED CONDITION CHART

        Item Specified Condition
        Intake 0.19 to 0.29 mm (0.00748 to 0.0114 in.)
        Exhaust 0.38 to 0.48 mm (0.0150 to 0.0189 in.)
      2. Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifters.
        Fig 2: Identifying Valve Lifters
        G06008221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. ADJUST VALVE CLEARANCE 
    1. Set No. 1 cylinder to TDC/compression (See REMOVAL ).
    2. Remove the No. 1 chain tensioner (See REMOVAL ).
    3. Loosen the camshaft timing sprocket (See REMOVAL ).
    4. Remove the No. 2 camshaft (See REMOVAL ).
    5. Remove the camshaft (See REMOVAL ).
    6. Remove the valve lifters.
    7. Using a micrometer, measure the thickness of the removed valve lifters.
    8. Calculate the thickness of a new lifter so that the valve clearance comes within the specified values.

      New Lifter Thickness 

      ITEM SPECIFIED CONDITION CHART

      Item Specification
      Intake A = B + (C - 0.24 mm (0.00945 in.))
      Exhaust A = B + (C - 0.43 mm (0.0169 in.))
      Fig 3: Measuring Thickness Of Valve Lifters
      G04828989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      LIFTER THICKNESS

      A New lifter thickness
      B Used lifter thickness
      C Measured valve clearance

      CALCULATION EXAMPLE (Intake):

      1. Measured intake valve clearance = 0.40 mm (0.0157 in.)

        (Measured - Specification = Excess clearance) (a)0.40 mm (0.0157 in.) - 0.24 mm (0.00945 in.) = 0.16 mm (0.00630 in.)

      2. Measured used lifter thickness = 5.250 mm (0.2067 in.)
      3. New lifter thickness = 5.410 mm (0.2130 in.) (Excess clearance + Used lifter thickness = Ideal new lifter)
        1. 0.16 mm (0.00630 in.) + 5.250 mm (0.2067 in.) = 5.410 mm (0.2130 in.)
      4. Closest new lifter = 5.420 mm (0.2134 in.)
        • Select No. 42 lifter
    9. Select a new lifter with a thickness as close as possible to the calculated values.

      HINT:

      • Lifters are available in 35 sizes in increments of 0.020 mm (0.000787 in.), from 5.060 to 5.740 mm (0.1992 to 0.2260 in.).
      • The identification number inside the valve lifters shows the value to 2 decimal places. (The illustration shows 5.420 mm (0.2134 in.)
      Fig 4: Identifying Valve Lifters Identification Number
      G04973936Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. Valve lifter selection chart (intake).
      Fig 5: Valve Lifter Selection Chart (Intake)
      G06008224Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      New Lifter Thickness 

      LIFTER THICKNESS

      Lifter No. Thickness mm (in.) Lifter No. Thickness mm (in.) Lifter No. Thickness mm (in.)
      06 5.060 (0.1992) 30 5.300 (0.2087) 54 5.540 (0.2181)
      08 5.080 (0.2000) 32 5.320 (0.2094) 56 5.560 (0.2189)
      10 5.100 (0.2008) 34 5.340 (0.2102) 58 5.580 (0.2197)
      12 5.120 (0.2016) 36 5.360 (0.2110) 60 5.600 (0.2205)
      14 5.140 (0.2024) 38 5.380 (0.2118) 62 5.620 (0.2213)
      16 5.160 (0.2031) 40 5.400 (0.2126) 64 5.640 (0.2220)
      18 5.180 (0.2039) 42 5.420 (0.2134) 66 5.660 (0.2228)
      20 5.200 (0.2047) 44 5.440 (0.2142) 68 5.680 (0.2236)
      22 5.220 (0.2055) 46 5.460 (0.2150) 70 5.700 (0.2244)
      24 5.240 (0.2063) 48 5.480 (0.2157) 72 5.720 (0.2252)
      26 5.260 (0.2071) 50 5.500 (0.2165) 74 5.740 (0.2260)
      28 5.280 (0.2079) 52 5.520 (0.2173) - -

      Standard intake valve clearance (cold): 

      0.19 to 0.29 mm (0.00748 to 0.0114 in.) 

      EXAMPLE:

      The 5.250 mm (0.2067 in.) lifter is installed, and the measured clearance is 0.400 mm (0.0157 in.). Replace the 5.250 mm (0.2067 in.) lifter with a new No. 42 lifter.

    11. Valve lifter selection chart (exhaust).
      Fig 6: Valve Lifter Selection Chart (Exhaust)
      G04973938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      New Lifter Thickness 

      LIFTER THICKNESS

      Lifter No. Thickness mm (in.) Lifter No. Thickness mm (in.) Lifter No. Thickness mm (in.)
      06 5.060 (0.1992) 30 5.300 (0.2087) 54 5.540 (0.2181)
      08 5.080 (0.2000) 32 5.320 (0.2094) 56 5.560 (0.2189)
      10 5.100 (0.2008) 34 5.340 (0.2102) 58 5.580 (0.2197)
      12 5.120 (0.2016) 36 5.360 (0.2110) 60 5.600 (0.2205)
      14 5.140 (0.2024) 38 5.380 (0.2118) 62 5.620 (0.2213)
      16 5.160 (0.2031) 40 5.400 (0.2126) 64 5.640 (0.2220)
      18 5.180 (0.2039) 42 5.420 (0.2134) 66 5.660 (0.2228)
      20 5.200 (0.2047) 44 5.440 (0.2142) 68 5.680 (0.2236)
      22 5.220 (0.2055) 46 5.460 (0.2150) 70 5.700 (0.2244)
      24 5.240 (0.2063) 48 5.480 (0.2157) 72 5.720 (0.2252)
      26 5.260 (0.2071) 50 5.500 (0.2165) 74 5.740 (0.2260)
      28 5.280 (0.2079) 52 5.520 (0.2173) - -

      Standard exhaust valve clearance (cold): 

      0.38 to 0.48 mm (0.0150 to 0.0189 in.) 

      EXAMPLE:

      The 5.340 mm (0.2102 in.) lifter is installed, and the measured clearance is 0.510 mm (0.0201 in.).

      Replace the 5.340 mm (0.2102 in.) lifter with a new No. 42 lifter.

    12. Install the selected valve lifter.
    13. Install the camshaft (See INSTALLATION ).
    14. Install the No. 2 camshaft (See INSTALLATION ).
    15. Install the No. 1 chain tensioner (See INSTALLATION ).
  9. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY  (See INSTALLATION )
  10. INSTALL SPARK PLUG  (See REMOVAL )
  11. INSTALL IGNITION COIL ASSEMBLY  (See INSTALLATION )
  12. INSPECT FOR OIL LEAK 
  13. INSPECT IGNITION TIMING  (See ENGINE )
  14. INSTALL NO. 1 ENGINE COVER SUB-ASSEMBLY  (See INSTALLATION )
  15. INSTALL ENGINE UNDER COVER RH 
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