VALVE SPRING INSPECTION
VALVE SPRING INSPECTION
SM2841684
id011000501400
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Caution
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• The valve springs differ depending on the IN and EX sides. Therefore, verify the free length or identification paint beforehand and inspect the valve springs.
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1.Measure the valve spring height using the spring tester.
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• If it is not within the specification, replace the valve spring.
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Valve spring installation height
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IN: When pressurized with spring force of 204—226 N {20.9—23.0 kgf, 45.9—50.8 lbf}, spring height is 48.4 mm {1.91 in}EX: When pressurized with spring force of 232—258 N {23.7—26.3 kgf, 52.2—58.0 lbf}, spring height is 48.2 mm {1.90 in}
2.Measure the amount of off-square on the valve spring using a square.
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- (1)Rotate the valve spring one full turn and measure A at the point where the gap is the largest.
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• If it exceeds the maximum specification, replace the valve spring.
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Maximum valve spring off-square
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IN: 2.0 ° (2.9 mm {0.1142 in})EX: 2.0 ° (3.0 mm {0.1181 in})
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