engines is a simpler task than with the centrally-located camshafts in pushrod engines. An engine's camshaft has egg-shaped lobes that act as ramps to open the intake and exhaust valves.

He wanted to replace the ball valve with one actuated by a cam and pushrod. This would increase the complexity of the engine quite a bit, but with the benefit of eliminating the fail point of the ...

which is in the engine block. The camshaft activates pushrods that move up and down to operate rocker arms that open and close the valves in the cylinder head. For the most part, a single overhead ...