Valve Spring: Testing and Inspection

VALVE SPRING INSPECTION





1. Apply pressing force to the pressure spring and inspect the spring height.
^ If it is less than the specification, replace the valve spring.

Valve spring installation height
28.68 mm (1.129 in) (390 N (39.8 kgf, 87.7 lbf))

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 specification, replace the valve spring.

Maximum valve spring off-square
3.41 mm (0.134) (2°)