Valve Spring

WARNING: This page is about a different variant/trim than selected.

Check the valve springs for damage, free length, and tension. Replace the valve spring if it is not within the standard value presented in the table.

To measure the squareness of the valve spring, stand the spring on a surface plate and measure its deflection at the top of spring using a try square.

FREE LENGTH CHART

Free length mm (in)		55.2(2.173)
Tension/spring height N (kgf, lb)/mm (in)	Set	235.3 - 270.7 (24 - 27.6, 52.9 - 60.8)/45.0 (1.772)
	Lift	578.9 - 639.9 (59.1 - 65.3, 130.3-143.9)/ 34.7 (1.366)
Squareness		2.5°, 2.4 mm (0.094 in) or less

Fig 1: Measuring Squareness Of Valve Spring

Courtesy of SUBARU OF AMERICA, INC.