What are the causes of unstable engine oil pressure?
2 Answers
The unstable engine oil pressure is caused by insufficient oil suction by the oil pump or the inability of the relief valve to function properly. Here are the specific details: Insufficient oil suction by the oil pump: The oil strainer screen being clogged with impurities, incorrect installation preventing the screen from fully immersing in the oil, or the use of excessively viscous oil can all lead to insufficient oil suction by the pump. Relief valve malfunction: If the spring of the relief valve is severely corroded, the valve seat is unevenly worn, the spring is broken or severely deformed, the valve core may get stuck and fail to open or close responsively with pressure changes. Normal engine oil pressure is essential to ensure proper lubrication of all engine friction components. If low oil pressure is detected, the vehicle should be stopped to identify and rectify the issue before continuing to drive. Otherwise, it may lead to severe consequences such as bearing seizure due to insufficient lubrication, and in extreme cases, the engine may be rendered irreparable.
I experienced unstable oil pressure while driving, which was quite nerve-wracking. The usual causes include insufficient oil level, perhaps due to forgetting to check the dipstick for leaks, or a malfunctioning oil pump causing uneven oil delivery. Once, my car's filter was clogged, causing the oil pressure to fluctuate wildly, nearly damaging the engine. The oil itself could also degrade or be the wrong viscosity grade, especially thinning out in summer heat, making the pressure erratic. A faulty sensor might also give false alarms, indicating unstable pressure when everything is fine. I believe it's essential to develop the habit of regularly checking oil levels and topping up when necessary, as well as changing the filter and oil on time without delay. If the dashboard warning light flashes, it's best to stop and check immediately, seeking professional repair if needed. Prevention is better than dealing with issues later—ensuring engine health for worry-free driving.
