VALVE SPRING INSPECTION [MZR-CD 2.2]

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

• If it is not within the specification, replace the valve spring.

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Valve spring pressing force

IN: 107.4—121.8 N {10.96—12.42 kgf, 24.15—27.38 lbf}

EX: 232.7—257.3 N {23.73—26.23 kgf, 52.32—57.84 lbf}

Valve spring free height

IN: 37.6 mm {1.48 in}

EX: 49.99 mm {1.968 in}

Valve spring installation height

33.5 mm {1.32 in}

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 maximum specification, replace the valve spring.

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Maximum valve spring off-square

1.55 mm {0.061 in}