Does Replacing Engine Valves Require Grinding?

[Tessa]

Replacing engine valves requires a running-in period, but they will automatically break in, and about 2 hours of running-in is sufficient. Here is some information about valves: Function: The valve (Valve) is responsible for introducing fuel into the engine and expelling exhaust gases. Traditional engines have only one intake valve and one exhaust valve per cylinder. This design is relatively simple, cost-effective, easy to maintain, and performs well at low speeds. However, its drawback is that it is difficult to increase power, especially at high speeds where the charging efficiency is low and performance is weaker. Multi-valve: To improve intake and exhaust efficiency, multi-valve technology is now commonly used, typically with 4 valves per cylinder.