Checking The Valve Springs

The following procedure applies to all of the valve springs. 1. Measure: • valve spring free length @ Out of specification ^ Replace the valve spring.

Valve spring free length Intake valve spring (inner) 37.0 mm (1.46 in) <Limit>: 35.2 mm (1.39 in) Intake valve spring (outer) 38.4 mm (1.51 in) <Limit>: 36.5 mm (1.44 in) Exhaust valve spring 41.8 mm (1.65 in) <Limit>: 39.7 mm (1.56 in)

2. Measure: • compressed valve spring force @ Out of specification ^ Replace the valve spring. © Installed length

Compressed valve spring force (installed)

Intake valve spring (inner) 69.0 - 79.0 N * (7.03 - 8.05 kg, 15.50 - 17.75 lb) Intake valve spring (outer) 114.0 - 132.0 N (11.62 - 13.46 kg, 25.63 - 29.67 lb) Exhaust valve spring 160 - 184 N (16.32 - 18.76 kg, 35.97 - 41.36 lb)

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