VALVE SPRING INSPECTION

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1. Apply pressing force to the pressure spring and inspect the spring height.

  • If it is less than the specification, replace the valve spring.

belbze00000139

  Standard height

  Valve spring with pink paint mark: 30.2 mm {1.19 in} (pressing force 388.7 N {39.64 kgf, 87.38 lbf})
  Except above: 28.68 mm {1.129 in} (pressing force 390 N {39.76 kgf, 87.67 lbf})

2. Measure the out-of-square of the valve spring, using a square, as shown in the figure.

  (1) Rotate the valve spring one full turn and measure "A" at the point where the gap is the largest.
    • If it exceeds the specification, replace the valve spring.

  belbze00000140

    Valve spring maximum out-of-square
    2.0°