How to Adjust Valves on a Four-Cylinder Engine?

[SanRyder]

Four-cylinder engine valve adjustment method: Rotate cylinder 1 to the compression top dead center (there is a scale on the crankshaft pulley or a mark on the crankshaft flywheel) to align with the 0 scale line or the pointer on the timing gear housing; adjust the intake and exhaust valves of cylinder 1, the intake valve of cylinder 2, and the exhaust valve of cylinder 3; then rotate 360 degrees to adjust the exhaust valve of cylinder 2, the intake valve of cylinder 3, and the intake and exhaust valves of cylinder 4. When the engine is running, the valves operate under high temperatures, and components such as the valves elongate due to thermal expansion. Therefore, a certain valve clearance must be reserved when the valves are cold to ensure that the valves and valve seats remain tightly fitted when the valves expand due to heat.