What is the function of an oil pump?

• A. Supplies oil under pressure to engine points that require lubrication.
• B. Filters oil to remove contaminants.
• C. Cools the oil and maintains engine temperature.
• D. Generates electricity for the engine.

Answer: (A)

The oil pump’s job is to supply oil under pressure to the engine lubrication points. It draws oil from the sump and pushes it through passages to bearings, crank journals, camshaft areas, and other moving parts, creating a lubricating film that minimizes wear and helps carry away heat. The pump is typically driven by the crankshaft or timing mechanism and maintains the oil pressure needed for proper lubrication at all operating speeds. It isn’t performing filtration (that’s the oil filter), nor is it the primary cooling device or an electrical generator.