And I looked, and, behold, a whirlwind came out of the north, a great cloud, and a fire infolding itself, and a brightness was about it, and out of the midst thereof as the colour of amber, out of the midst of the fire. The verse above introduces an internal combustion engine, a rotating wind, which is continually sparking . Four pistons atop connecting rods, thus resembling a head upon a torso and legs. And every one had four faces, and every one had four wings. Four internal combustion phases, and four rockers resembling wings with their four valves.
Coil springs around each valve resemble fists.
This time, faces refer to the valve faces. Notice that wing can mean edge, extremity. The valves and rockers are an assembly over the cylinder head. Despite their round shape, valves reciprocate rather than rotate. The moving piston and rod end moving along their huge circuit do appear faint, or indistinct like embers.