Is Isuzu's six-cylinder engine 12 valve or 24 valve?

Isuzu engine is imported from Japan, generally with 6 cylinders 12 valves. There are two common methods to check and adjust the valve clearance: one is the cylinder-by-cylinder adjustment method, that is, after the piston of a cylinder is determined to be at the compression top dead center position according to the cylinder ignition sequence, the valve clearance between the intake valve and the exhaust valve of the cylinder can be adjusted, and then the crankshaft is rotated, and the valve clearances of other cylinders are gradually adjusted according to this method.

Structure of six-cylinder engine of Isuzu engine

Second, the method of twice adjustment is adopted, that is, the crankshaft is rotated 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 (such as EQ6 100 engine). At this time, you can adjust the valves of 1, 2, 4, 5, 8 and 9 (referring to the sequence of engine valves from front to back), and then turn the crankshaft once to make the pistons of six cylinders at compression top dead center.

Cylinder-by-cylinder method requires multiple cranks to turn the crankshaft, which requires a lot of time for inspection and adjustment. However, for the seriously worn engine, it is more accurate to check and adjust the valve clearance by cylinder, and it is more time-saving and labor-saving to adjust the valve clearance twice. However, it is difficult for maintenance personnel to remember the different adjustable valve serial numbers of different models, and the models are complicated. Open the valve cover, turn the engine, and adjust the cylinder at the top dead center to see which cylinder is at the top dead center of compression.