1. According to the ignition sequence of the cylinder, the cylinder piston can be adjusted by adjusting the clearance between the intake and exhaust valves after determining the position of the piston at the compression top dead center, adjust the valve clearance of other cylinders step by step.
2. The crankshaft is rotated twice so that the piston of the first cylinder is at the compression top dead center, and the flywheel mark is aligned with the check hole line, the valves 1,2,4,5, and 8,9 are then adjusted, and the crankshaft is rotated once to bring the six-cylinder piston to the top of the compression stroke, adjust 3,6,7,10“Plus two”(that is, 11,12) valve, this is actually a mnemonic adjustment. When adjusting, screw the adjusting screw, insert the gauge between the valve rod end and the rocker arm and pull it back and forth. Cylinder-by-cylinder method needs to rotate the crankshaft many times and takes much time to check, but for the engine with serious wear, it is more accurate to check the valve clearance by cylinder-by-cylinder method. The two-time method to adjust the valve clearance saves time and effort, but for different models need to remember different adjustable valve sequence number, the model is complex, it is difficult to remember the maintenance personnel.