Valve Spring Inspection

VALVE SPRING INSPECTION





1. Apply pressing force to the pressure spring and measure the spring height. If the spring height is not as specified, replace the valve spring.
Pressing force
IN: 172.60 - 195.15 N (17.6 - 19.9 kgf, 38.72 - 43.78 lbs.)
EX: 172.60 - 195.15 N (17.6 - 19.9 kgf, 38.72 - 43.78 lbs.)
Standard height
IN: 39.5 mm (1.56 inch)
EX: 39.5 mm (1.56 inch)
Free length (Reference)
IN: 45.14 mm (1.777 inch)
EX: 46.68 mm (1.838 inch)





2. Measure the out-of-square of the valve spring. If the out-of-square is not as specified, replace the valve spring.
Valve spring out-of-square
IN: 1.58 mm (0.062 inch) max.
EX: 1.63 mm (0.064 inch) max.