L-Series Wagon 4WD F4-1781cc 1.8L SOHC (Carb) (1987)
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VALVE AND VALVE SPRING
1. The valve has a small valve stem diameter [7 mm (0.28 in) dia.] to reduce the valve weight. The variable pitch valve spring is adopted to improve
valve follow-up performance at high engine speeds.
2. The valve has a large valve head diameter to increase engine output.
