How to adjust the throttle of Wuling Cheng Zheng 15?

(1) Remove the valve cover and set the throttle. Remove the fixing screw of the bonnet, and carefully remove the bonnet, taking care not to damage the bonnet gasket. Wipe off the oil stains on the valve and rocker shaft with a rag to facilitate the valve adjustment operation.

(2) Find the top dead center of cylinder compression and set the throttle. Turn the crankshaft with a hand crank or pry the flywheel to make the first cylinder in the compression top dead center position.

When viewed from the front of the engine, the timing pit of the crankshaft pulley is aligned with the timing mark to set the throttle. On some large vehicles, the inspection hole 1-6 cylinder line of the flywheel housing is aligned with the timing mark of the flywheel housing. For example: Dongfeng EQ6 100- 1 engine and flywheel 1-6 cylinder should be marked with the steel ball of the flywheel housing.

At this time, from the valve point of view, all valves of a cylinder should be set to the throttle valve in the open and closed state. If the valve of a cylinder is not completely closed, it means that the piston of a cylinder is at the bottom dead center position. You should turn the crankshaft for another 360 degrees so that the first cylinder is at the compression top dead center position.

(3) Set the throttle valve by determining that each cylinder is at the compression top dead center. According to the principle of engine structure, we know that when each cylinder is at compression top dead center, the valve of the cylinder is in a closed state. Therefore, you can open the distributor cover, determine the position of the high-pressure branch pipeline of each cylinder, and turn the crankshaft. When the distributor points to the high-pressure branch pipeline position of the cylinder, the cylinder is at the top dead center position of the compression stroke at the moment when the contact is disconnected. In this way, the position of compression top dead center of each cylinder can be accurately determined, and the valve can be adjusted conveniently.

(4) Measure the valve clearance and set the throttle valve. Valve clearance can be divided into cold car value and hot car value, so you should measure it under the condition of meeting the requirements of car use.

Select a plug gauge that meets the specifications and insert it between the valve stem and the valve rocker arm (or cam) to set the throttle. Gently pull the plug gauge. If there is slight resistance, the clearance is correct.