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VALVE SPRING INSPECTION

id011000501400

1. Measure the spring height using a spring tester.

  • If it exceeds the specification, replace the valve spring.

  Standard valve spring height
  When pressurized with spring force of 262.8 N {26.8 kgf, 59.0 lbf}, spring height is 27.5 mm {1.08 in}

2. Measure the amount of off-square on the valve spring using a square.

  (1) Rotate the valve spring one full turn and measure "A" at the point where the gap is the largest.

  • If it exceeds the maximum specification, replace the valve spring.

  Maximum spring off-square
  2.0° (3.45 mm {0.136 in})