What are the causes of engine oil pressure failure?
2 Answers
Engine oil pressure failure is generally caused by low oil pressure. The reasons for low oil pressure include: 1. Insufficient oil volume: Low oil pressure caused by insufficient oil volume. 2. Oil pump wear or damage: Low oil pressure caused by oil pump wear or damage. 3. Excessive engine temperature: Low oil pressure caused by oil aging and deterioration due to excessive engine temperature. 4. Clogged oil pickup screen: Low oil pressure caused by a clogged oil pickup screen. 5. Damaged or improperly adjusted pressure relief valve: Low oil pressure caused by a damaged or improperly adjusted pressure relief valve. 6. Oil cooler leakage: Low oil pressure caused by oil cooler leakage. 7. Low oil viscosity: Low pressure caused by low oil viscosity. 8. Malfunctioning oil pressure display device: Low oil pressure caused by a malfunctioning oil pressure display device.
From my over a decade of experience in car repair, there are several main reasons for oil pressure failure. The most common one is insufficient oil level - when the car runs too long without oil replenishment, causing pressure to drop. Another major issue is a faulty oil pump, where the pump blades are worn or stuck, failing to circulate oil. Then there's clogged oil filters preventing oil flow; I've seen many cars fail due to overdue filter replacements. Oil passage blockage with sludge-clogged small holes is another culprit. Severe bearing wear with excessive clearance also can't maintain pressure. Additionally, sensors sometimes give false alarms. This problem is quite dangerous - when the warning light comes on, it's best to pull over immediately, otherwise the engine might seize, leading to costly repairs. Regular oil level checks are essential, change oil every six months using the correct specification.
