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Valve Spring

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  1. 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.
  2. To measure the squareness of the valve spring, stand the valve spring on a surface plate and measure its deflection at the top of the spring using a try square.
VALVE SPRING SPECIFICATION CHART

Free length mm (in) 49.06 (1.9315)
Tension/spring height N (kgf, lb)/mm (in) Set 182 - 210 (18.6 - 21.4, 40.9 - 47.2)/31.0 (1.220 in)
Lift 316 - 350 (32.2 - 35.7, 71.0 -78.7)/21.0 (0.827 in)
Squareness 2.5°, 2.1 mm (0.083 in) or less
Fig 1: Measuring Squareness Of Valve Spring
G04998741Courtesy of SUBARU OF AMERICA, INC.