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1.Measure the valve spring height using the spring tester.

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

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Valve spring installation height

37.90 mm {1.492 in} (171.5 N {17.49 kgf, 38.55 lbf})

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.

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Maximum valve spring off-square

3.17 mm {0.124 in}