Valve Spring

WARNING: This page is about a different car, the 2004 Subaru Outback, 2004 Subaru Legacy, and 2004 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.

Check valve springs for damage, free length, and tension. Replace valve spring if it is not to the specifications presented below.
To measure the squareness of the valve spring, stand the spring on a surface plate and measure its deflection at the top using a try square.

Fig 1: Measuring Squareness Of Valve Spring (1 Of 2)
Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Measuring Squareness Of Valve Spring (2 Of 2)
Courtesy of SUBARU OF AMERICA, INC.