a small air leak at a crank seal or an intake gasket will cause the usually perfect fuel air mixture in the crankcase to become slightly lean sometimes very lean this lean mixture can quickly result in a seized piston air leaks are by far the number one cause of vintage engine piston seizures
Lugs are the electrical connectors that terminate the electrical circuit. Lugs are made of copper, aluminum, or bronze. They are made for the smallest wire size, 26 gauge to the largest 2000 MCM. Lugs can be mechanical or set screw; compression or crimp, solder or weld; or clamp type.
Automotive SLI batteries are usually lead-acid type, and are made of six galvanic cells connected in series to provide a nominally 12- volt system. Each cell provides 2.1 volts for a total of 12.6 volts at full charge.