2. Loosen the valve adjusting nut with a wrench, and loosen or tighten the internal thread in one word. At this time, the feeler gauge can be inserted into the gap for adjustment. As shown in the figure
3. First adjustment. Install the crescent pin on the camshaft, rotate the crescent pin downward with adjustable wrench, and adjust the intake valve and exhaust valve of 1 cylinder, cylinder 2 and cylinder 3 according to the adjustment formula. As shown in the figure
4. Second adjustment. Turn the crescent pin upward, and then find the compression top dead center of the four-stroke engine 1 cylinder. As shown in the figure
Extended data:
For a 6-cylinder engine with the working sequence of 1-5-3-6-2-4, when one cylinder compresses TDC, the positions of other cylinders are:
(1 cylinder) At the end of the compression stroke, the intake valve is closed and the exhaust valve is closed at the beginning of the power stroke.
(2 cylinders) The exhaust stroke starts from TDC 120 degrees (the exhaust valve is open) and the intake valve is closed.
(3 cylinders) At the end of the intake stroke, the exhaust valve is closed (the intake valve is open) at a distance of 60 degrees from the bottom dead center.
(4 cylinders) The intake valve is closed at the end of the power stroke, 60 degrees away from the bottom dead center (the exhaust is opened in advance).
(Cylinder 5) At the beginning of the compression stroke, the exhaust valve is closed within 0/20 degrees from the top dead center (late intake)/kloc.
(Cylinder 6) The exhaust stroke ends and the intake stroke begins (early intake) (late exhaust).