... curved surface,the down section is of slipper structure,with two compression rings and one oil ring.·Valve mechanism is of ... thermostat.The main technical parameters of CY4102BQ Model CY4102BQ Type Vertical, in-line, water-cooled, four strokes, natural aspirated No. of ... tons cargo truck, 6-7 m passenger bus ect. CY4102 Vertical, in-line, water-cooled, four strokes, natural aspirated