How to Adjust the Valve of Jiefang 390 EFI Engine

Toggle the rocker arm of the exhaust valve of the first cylinder.

First, uncover the blockage of the flywheel housing and slowly turn the flywheel starting gear. When the pointer of the flywheel housing is aligned with the "0" scale line on the flywheel, the piston of the first cylinder or the sixth cylinder is at the top dead center position. Secondly, check or adjust the piston of the first cylinder with a special socket wrench and screwdriver of 16mm. Finally, the flywheel rotates counterclockwise 128, adjusting the crank angle and the exhaust valve clearance of the sixth cylinder.

The function of the valve is specially responsible for inputting air into the engine and discharging exhaust gas after combustion. From the engine structure, it is divided into intake valve and exhaust valve. The function of the intake valve is to draw air into the engine and mix it with fuel for combustion, and the function of the exhaust valve is to discharge the burnt exhaust gas and dissipate heat.