'Valve springs Inspect each spring for cracks, and check it for square- ness, free length and as-installed length against these specifications: Specifications Unit: mm (in.) Checking valve spring Checking valve spring for squareness Exhaust manifold If the flange faces are warped by more than 0.2 mm (0.0079 in.) when checke as shown, grind them smooth and flat. If any flange is found cracked, replace the manifold_ Checking exhaust manifold flange surface for flatness -19 - Item Standard Repair limit Valve spring free length 48.85 (·1.9232) 47.6 (1.874) Valve spring squareness 1.5°, max Load compress spring to initial working lenfth [43 mm (1.69 in.) kg(lb) 19 ± 1 (41.9 ± 2.21) 15 (33.08)