What is the adjustment method of valve clearance of gasoline engine?

1. Cylinder-by-cylinder adjustment method \x0d\ After determining the compression top dead center position of the piston of a cylinder, the clearance between the intake valve and the exhaust valve of the cylinder can be adjusted; After adjustment, turn the crankshaft and gradually adjust the valve clearance of other cylinders according to this method. \x0d\2。 Turn the crankshaft twice, so that the piston of the first cylinder is at the compression top dead center, and the flywheel mark is aligned with the inspection hole. At this time, 1, 2, 4, 5, 8 and 9 valves can be adjusted (referring to the sequence of engine valves from front to back); Then turn the crankshaft once, so that the six-cylinder piston is at the top dead center of the compression stroke, and then adjust 3, 6, 7, 10 "plus two valves (i.e. 1 1, 12), which is actually memory adjustment. When adjusting, while tightening the adjusting screw, insert the thickness gauge between the valve stem end and the rocker arm and pull it back and forth. If you feel slight resistance, check it again until it is suitable. \x0d\ Cylinder-by-cylinder method requires a large number of crankshafts and a lot of time for inspection and adjustment, but for seriously worn engines, cylinder-by-cylinder method is more accurate for checking and adjusting valve clearance. Adjusting the valve clearance twice saves time and effort, but it is difficult for maintenance personnel to remember the different adjustable valve serial numbers of different models, which is more complicated.