Valve, Intake/Exhaust

Valve Specifications

Valve head margin thickness

Minimum
IN: 1.62 mm (0.0637 in)
EX: 1.82 mm (0.0716 in)

Valve length

Standard
IN: 102.99--103.79 mm (4.055-4.086 in)
EX: 104.25-105.05 mm (4.105-4.135 in)

Minimum
IN: 102.99 mm (4.055 in)
EX: 104.25 mm (4.104 in)

Valve stem diameter

Standard
IN: 5.470-5.485 mm (0.2154-0.2159 in)
EX: 5.465-5.480 mm (O.2152-0.2157 in)

Minimum
IN: 5.440 mm (0.2142 in)
EX: 5.435 mm (0.2140 in)

Valve guide inner diameter

Standard 5.509-5.539 mm (0.2169-0.2180 in)

Valve stem to guide clearance

Standard
IN: 0.024-0.069 mm (O.0009-0.0027 in)
EX: 0.029-0.074 mm (0.0012-0.0029 in)

Maximum 0.10 mm (0.004 in)

Valve guide protrusion height

Standard 12.2-12.8 mm (0.481-0.503 in)

Valve seat contact width

Standard 1.2-1.6 mm (0.048-0.062 in)

Valve protrusion height

Standard
IN: 40.64-42.24 mm (1.6O0-1.662 in)
EX: 40.50-42.10 mm (1.595-1.657 in)

Valve spring pressing force 390 Nm (39.76 kgf, 87.67Ibf)

Valve spring standard height 28.68 mm (1.129 in)

Valve spring out-of-square
Maximum 1.95 mm (0.0767 in)