Automotive engine valves are essential components in an internal combustion engine that regulate the intake of air-fuel mixture and the expulsion of exhaust gases. Typically made of durable metals, they are located in the cylinder head. There are two main types: intake valves and exhaust valves.

During the intake stroke, intake valves open to allow the air-fuel mixture to enter the combustion chamber. Post-combustion, the exhaust valves open during the exhaust stroke, releasing burned gases into the exhaust system. A precisely timed mechanism, often controlled by a camshaft and linked via lifters, pushrods, and rocker arms, actuates the opening and closing of these valves. The closed position is maintained by valve springs, ensuring a seal until the next cycle.

Proper synchronization ensures efficient engine operation, maximizing power and fuel efficiency, while minimizing emissions. Wear or damage to these valves can compromise engine performance and require repair or replacement.

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