What is the valve clearance for the Weichai WP10 engine?
2 Answers
Intake valve 0.3mm, exhaust valve 0.35mm. Since the valves are in contact with the cylinder block, which generates substantial heat during operation, this heat transfers to the valves, increasing their thermal expansion. Precautions for using Weichai natural gas engines: 1. Note 1: Before initial use, inspect the gas pipelines, supply devices, and electrical components for any gas leaks or unreliable electrical connections, and address any issues promptly. 2. Note 2: Ensure the battery voltage is sufficient, as the engine ignition and electronic control systems require adequate voltage. 3. Note 3: If the engine fails to start after three consecutive attempts, thoroughly recheck the gas and electrical systems. 4. Note 4: New vehicles must undergo a proper break-in period before regular use. 5. Note 5: Monitor gas levels and refuel promptly. When refueling, adhere to gas station regulations and let the station personnel handle the operation. Also, check the gas system's sealing during refueling. 6. Note 6: Drivers of gas-powered vehicles should enhance their knowledge and familiarize themselves with the principles of gas engines. 7. Note 7: For fuel, use only CNG that meets national standards for vehicles. 8. Note 8: Since the combustion products of CNG-only engines differ from diesel engines, use engine oil specifically designed for CNG engines.
The standard valve clearance for the Weichai WP10 engine is 0.30 mm for the intake valve and 0.40 mm for the exhaust valve when cold. This value is quite critical. When I previously inspected the engine, I found that if the clearance is too small, the valves may get stuck, leading to engine overheating and power loss; if the gap is too large, there will be noise, like a ticking sound, which is quite annoying. It's best to measure when the engine is cooled down, using a tool called a feeler gauge to gently probe and test. Adjusting those screws is also a meticulous job. Don't forget to check it regularly, recommended at intervals of about every 10,000 kilometers, which can extend the engine's lifespan, as a major overhaul is both costly and time-consuming. I remember the first time I adjusted this, it took me over an hour. Although it was tiring, the engine ran much smoother afterward.
