Is Cylinder No. 1 the First Cylinder?

[OGage]

In inline engines, the cylinder at the pulley end is generally the first cylinder. Cylinder Adjustment: First, loosen the adjustment screws of each cylinder by 1-2 turns. Rotate the first cylinder to the top dead center of the compression stroke, aligning the '0' mark on the flywheel with the inspection pointer on the engine block. At this point, the intake and exhaust valves of the cylinder are closed, allowing for gap adjustment. The intake and exhaust valve heads are directly located in the combustion chamber, and the entire exhaust valve head is situated in the exhaust passage, thus being exposed to very high temperatures. Methods to Identify Non-Functioning Cylinders: Using a diagnostic computer is more direct and accurate than physical judgment. Older models required shorting pins in the OBD interface and reading codes with a test light, but now there are specialized or universal diagnostic computers available, making computer-based diagnostics convenient and accurate.