1930 Ford Model A
Inline 4-cylinder engine, L-head valves, 201 cubic inches displacement, 40 horsepower

Painting engine blocks is a long-standing tradition among automakers. In the 1960s, Ford favored blue while Chevrolet preferred orange. But green was Ford’s color of choice when this Model A came off the line. The black enameled pipe, running diagonally along the block just below the carburetor, returns surplus oil from the valve chamber back to the crankcase.