VALVE SPRING INSPECTION

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Caution
•  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.
Valve spring installation height
IN: When pressurized with spring force of 195—215 N {19.9—21.9 kgf, 43.9—48.3 lbf}, spring height is 38.0 mm {1.50 in}
EX: When pressurized with spring force of 228—252 N {23.3—25.6 kgf, 51.3—56.6 lbf}, spring height is 38.0 mm {1.50 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.
•  If it exceeds the maximum specification, replace the valve spring.
Maximum valve spring off-square
IN: 2.0 ° (3.6 mm {0.14 in})
EX: 2.0 ° (3.6 mm {0.14 in})