Car Oil Pump

Modern pumps mainly use two designs:

• Gear-type (most common) with meshing gears for positive displacement

• Rotor-type (Gerotor) offering smoother flow and compact size

Key functions include:

• Maintaining 20-80 psi oil pressure (varies by engine)

• Supplying 1-6 gallons per minute at operating speed

• Feeding oil through galleries and filters

Performance depends on:

• Precise clearances (0.003-0.005" typical)

• Proper viscosity matching

• Relief valve operation

Failure symptoms include low oil pressure warning lights or engine knocking. Regular oil changes preserve pump longevity in this hard-working component that operates continuously whenever the engine runs.