How to adjust the EVB valve of Weichai WP10?
2 Answers
Loosen all the bolts of the EVB, adjust the exhaust valve rocker arm, and then adjust the EVB. The following is the relevant content introduction: Advantages of Weichai National III engine: 1. Good emissions: The emissions have fully reached the National III, National IV, and National V levels. In October 2005, all National III models passed TUV certification and obtained certificates. 2. Good power performance: Compared with other models, it has a larger displacement among models that meet Euro III emissions. Under the same rated power, it has a larger torque reserve. Among inline 6-cylinder engines, it has the highest power (480ps) and the highest torque (2110Nm), with a 10% improvement in power performance, filling the domestic gap.
I've been working on engines like the Weichai WP10 for a long time, and remember that valve adjustment for the EVB is a critical task. First, make sure the engine is completely cooled down to avoid burns. Then, use a wrench to turn the engine to the top dead center position of the first cylinder—usually, there's a mark on the crankshaft that needs to be aligned. Next, use a feeler gauge to measure the clearance of the intake and exhaust valves—intake valves are typically between 0.25 to 0.30mm, and exhaust valves between 0.35 to 0.40mm, but always check the manual to avoid mistakes. If the clearance is off, adjust the screw threads slowly; too loose or too tight will make the EVB braking unresponsive. After adjustment, tighten all the nuts, and finally start the engine to test if the sound is smooth. The EVB system relies on precise valve clearance; otherwise, it may fail during downhill braking, which is very dangerous. I recommend checking every 50,000 kilometers and always keep a toolkit handy for emergencies.
