TAPPET INSPECTION

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1. Measure the diameter of each tappet bore using the caliper gauge. Measurement positions total four and are in the X and Y directions, at two points (A and B) as shown in the figure.

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  Standard tappet bore diameter

  31.000—31.030 mm {1.2205—1.2216 in}

2. Measure the tappet body outer diameter of each valve using the micrometer. Measurement positions total four and are in the X and Y directions, at two points (A and B) as shown in the figure.

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  Standard tappet body outer diameter

  30.970—30.980 mm {1.2193—1.2196 in}

3. Calculate the clearance between the tappet and the related tappet bore by subtracting the outer diameter of the tappet from the inner diameter of the tappet bore.

  • If it exceeds the maximum specification, replace the tappet or cylinder head.

  Clearance between tappet and tappet bore

  Standard
  0.02—0.06 mm {0.0008—0.0023 in}
  Maximum
  0.15 mm {0.006 in}