What is the valve clearance for the Foton Cummins 460 engine?
2 Answers
When the engine is cold, the intake valve clearance should be between 0.15-0.20 mm, and the exhaust valve clearance should be between 0.20-0.25 mm. Here is some relevant information: 1. Valve clearance: Valve clearance refers to the gap left to accommodate thermal expansion of valves when the engine is operating. 2. Dangers of insufficient valve clearance: If there is no gap or too small a gap between the valve and its transmission components when cold, thermal expansion during operation will cause the valve to not close properly. This leads to gas leakage during compression and power strokes, resulting in reduced engine power and potentially making the engine difficult to start. 3. Solution: To prevent this phenomenon, a certain clearance is intentionally left between valves and their transmission mechanisms during cold assembly of the engine, to compensate for thermal expansion. This gap is called valve clearance.
I know that the valve clearance for the Foton Cummins 460 engine is approximately 0.25 mm for the intake valve and 0.35 mm for the exhaust valve, but these values may vary slightly depending on the engine's year and temperature. It's best to refer to the vehicle manual or consult a professional technician. Why is this so important? Because if the clearance is too large or too small, it can lead to increased engine noise, reduced power, and even accelerated wear. I remember during the last adjustment, it was crucial to measure with a feeler gauge when the engine was completely cooled, otherwise, thermal expansion could cause errors. It's also necessary to check every 30,000 kilometers to avoid breakdowns on the road. If you're doing it yourself, make sure to prepare gloves and goggles to avoid injuries from the camshaft. In short, maintaining the proper clearance can make the vehicle quieter, more fuel-efficient, and extend its lifespan.
