Final answer:
In a typical overhead valve engine, the camshaft lobe comes into direct contact with the rocker arm.
Step-by-step explanation:
In a typical overhead valve engine, the camshaft lobe comes into direct contact with the rocker arm. The camshaft is responsible for opening and closing the valves, and the rocker arm acts as a link between the camshaft and the valves. When the camshaft lobe pushes on the rocker arm, it causes the valves to open or close.
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