The oil pump in an internal combustion engine is usually a gear type (gear pump), driven by the crankshaft or camshaft, or a rotor type (rotary pump).
A mechanically-driven device for distributing or pumping oil around a 4 stroke engine & into a 2 stroke engine
Belonging to or forming the outer surface or structure of something
Relating to or denoting a medicine or similar substance for use on the outside of the body
Coming or derived from a source outside the subject affected
outward features; "he enjoyed the solemn externals of religion"
coming from the outside; "extraneous light in the camera spoiled the photograph"; "relying upon an extraneous income"; "disdaining outside pressure groups"
happening or arising or located outside or beyond some limits or especially surface; "the external auditory canal"; "external pressures"
"Amastra"
picture by: George Giganti, Captain of USS Current
Vietnam, Nha Trang bay, POL station.
At 0010h, on April 12, 1967,
the British flagged Shell Oil tanker M/V AMASTRA had been holed by an external explosive device in Nha Trang Harbor, Vietnam.
The engine room, fire room and the after pump room flooded in twenty minutes causing the AMASTRA’s stern to settle to the harbor bottom leaving the rear decks awash.
Challenger V8 Side Valve (Flathead) Automobile Engine, Built by Paul Knapp, AZ, 1996
Modifications to the original design include oversize valves, aluminum connecting rods dual carburetors with a high-rise manifold, a stainless steel water pump, and an external stainless steel oil pump.
Courtesy of Paul and Paula Knapp
Miniature Engineering Museum
engine-museum.com