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Valve NCEM0031 VALVE NCEM0031S01 Unit: mm (in) SEM188A T (Margin thickness) Valve head diameter “D” Intake 29.9 - 30.2 (1.177 - 1.189) Exhaust 24.9 - 25.2 (0.980 - 0.992) Valve length “L” Intake 92.00 - 92.50 (3.6220 - 3.6417) Exhaust 92.37 - 92.87 (3.6366 - 3.6563) Valve stem diameter “d” Intake 5.465 - 5.480 (0.2152 - 0.2157) Exhaust 5.445 - 5.460 (0.2144 - 0.2150) Valve face angle “ α ” 45°15 ′ - 45°45 ′ Valve margin “T” limit More than 0.5 (0.020) Valve stem end surface grinding limit 0.2 (0.008) VALVE SPRING NCEM0031S02 Free height 40.0 (1.575) Pressure N (kg, lb) at height mm (in) Standard 370.0 (37.73, 83.19) at 23.64 (0.9307) Limit 347.8 (35.46, 78.19) at 23.64 (0.9307) Out-of-square mm (in) Less than 1.75 (0.0689) VALVE LIFTER NCEM0031S10 Unit: mm (in) Valve lifter outside diameter 29.960 - 29.975 (1.1795 - 1.1801) Lifter guide inside diameter 30.000 - 30.021 (1.1811 - 1.1819) Clearance between valve lifter and valve lifter guide 0.025 - 0.061 (0.0010 - 0.0024) VALVE CLEARANCE NCEM0031S11 Unit: mm (in) For adjusting For checking Hot Cold* (reference data) Hot Intake 0.32 - 0.40 (0.013 - 0.016) 0.25 - 0.33 (0.010 - 0.013) 0.21 - 0.49 (0.008 - 0.019) Exhaust 0.37 - 0.45 (0.015 - 0.018) 0.32 - 0.40 (0.013 - 0.016) 0.30 - 0.58 (0.012 - 0.023) *: At a temperature of approximately 20°C (68°F) SERVICE DATA AND SPECIFICATIONS (SDS) QG Valve EM-179 |