Valvetrain
Videos
A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. The intake valves control the flow of air/fuel mixture into the combu
Cutaway of a dual overhead camshaft engine
1969 AMC V8 overhead valve engine. The rocker cover has been removed, so elements of the pushrods, rocker arms, valve springs, and valves are visible.
Ship engine with open rocker arms
Tappet
Videos
A tappet or valve lifter is a valve train component which converts rotational motion into linear motion in activating a valve. It is most commonly found in internal combustion engines, where it conver
Beam engine with tappet block on the vertical plug rod. The tappet block acts on the curved horn beneath it
Hydraulic tappets (along with rockers, valves and cylinder head) for a 1980-1985 Ford CVH engine
Diagram of a sidevalve engine
DOHC engine with a bucket tappet