What is EX and IN for valve clearance?

Answer 1

EX and IN refer to the exhaust and intake valves in an internal combustion engine, respectively. Valve clearance is the gap between the valve stem and the rocker arm or camshaft, which allows for thermal expansion and ensures proper valve operation. Correct valve clearance is crucial for optimal engine performance, efficiency, and to prevent potential damage due to valve sticking or excessive wear. Generally, specifications for EX and IN clearance can vary by engine type and manufacturer.