Assertion: valve's design | /r/CapableOf | push on the valve stem
Facets:
value: through cam followers
type: MANNER
value: directly
type: MANNER
Source sentences:
text: More modern designs have the camshaft on top of the cylinder head, pushing directly on the valve stem (again through cam followers, also known as tappets), a system known as overhead camshaft; if there is just one camshaft, this is a single overhead cam or SOHC engine.