69J3D11 1-8123456789PistonThe piston has been carved out of a forged stock. To prevent the valves from coming in contact withthe piston, the piston is provided with a valve recess. If the engine goes out of timing and a valveopens when the piston is at top-dead-center, this recess prevents the valve from coming in contactwith the piston, thus preventing engine damage.1 Valve spring2 Valve seal3 Piston4 Valve stem5 Intake valve6 Intake camshaft7 Valve lifter8 Valve recessS69J1280Features and benefits
