What is the adjustment method of valve clearance of four-cylinder engine?

There are three ways to adjust the valve clearance of a four-cylinder engine: 1. The first way is to use a standard gasket to compensate the clearance on the valve ejector pin by measuring the valve clearance value during assembly, but a new gasket is needed after wear; 2. Secondly, the hydraulic ejector pin is used, and the clearance is automatically adjusted by the hydraulic ejector pin, so it does not need to be adjusted until the hydraulic ejector pin is broken; 3. Finally, the old gasoline engine adjusts the screw compensation clearance on the rocker arm when the valve is fully closed; 4. Adjust the valve sequence. First of all, get the power of the first cylinder to do work, and adjust the intake and exhaust of the fourth cylinder, the intake and exhaust of the third cylinder and the second cylinder! Then get the power of the fourth cylinder to do work, adjust the intake and exhaust of the first cylinder and the intake and exhaust of the second cylinder! Remember to have the same gap. The sequence is 1-3-4-2. Million car purchase subsidy