VALVES AND VALVE SPRINGS ENG

Valve spring

1.Measure:

●Valve spring free length a

Out of specification → Replace.

Free length (valve spring): Intake:28.32 mm (1.11 in) <Limit>: 26.9 mm (1.06 in)

Exhaust:

28.32 mm (1.11 in) <Limit>: 26.9 mm (1.06 in)

2.Measure:

●Spring tilt a

Out of specification → Replace.

Spring tilt limit: Intake:2.5˚/1.2 mm (0.05 in) Exhaust:2.5˚/1.2 mm (0.05 in)Valve seat

1.Measure:

●Valve seat width a

Out of specification → Reface the valve seat.

Valve seat width: Intake:0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in) <Limit>: 1.6 mm (0.0630 in)

Exhaust:

0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in) <Limit>: 1.6 mm (0.0630 in)

Measurement steps:

●Apply Mechanic’s blueing dye (Dykem) b to the valve face.

●Install the valve into the cylinder head.

●Press the valve through the valve guide and onto the valve seat to make a clear pattern.

●Measure the valve seat width. Where the valve seat and valve face made contact, blueing will have been removed.

●If the valve seat is too wide, too narrow, or the seat is not centered, the valve seat must be refaced.

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