Checking whether an oil pump works normally is critical for ensuring proper engine lubrication and cooling. The following are detailed checking steps:
1.Observe oil pressure warning light
After the vehicle is started, if the oil pressure warning light on the dashboard remains constantly on (especially in idle status), it may indicate insufficient oil pump pressure. If the light lits up briefly and then goes out during cold start, it is usually a normal phenomenon.
2.Check oil level and status
Pull out the dipstick and check if the oil level is between “MIN” and “MAX”. A too low oil level can cause difficult oil pumping.
Observe the color of the engine oil: If the oil appears black or viscous or contains metal debris, it may block the oil pump screen and affect oil supply.
3.Determine if there is abnormal sound
During operation of the engine, if high-frequency buzzing or metal friction sounds are heard near the oil sump, they may be due to internal wear of the oil pump or damage to the bearing.
4.Check the oil pressure
Use an oil pressure gauge to locate the oil pressure sensor of the engine (typically located on the side of the cylinder body), remove the sensor and connect the pressure gauge. Start the engine to normal operating temperature, and record the oil pressure levels in idle status and at 3000 rpm. Consult the vehicle manual. If a pressure is lower than the standard value, it may be due to oil pump wear, failure of the pressure relief valve, or blocking of the oil circuit.
5.Disassembly for inspection
If the pressure is still insufficient after the possibilities of oil filter problem and oil circuit blocking are ruled out, it may be necessary to disassemble the oil pump for a more thorough inspection.
