What Causes Fluctuating Engine Oil Pressure?
1 Answers
Fluctuating engine oil pressure can be caused by the following reasons: 1. Faulty oil pump (e.g., excessive gear wear or loose fixing screws), causing the oil pump to suck in air. 2. The regulating valve or return valve spring is stuck by foreign objects, or the spring is bent and rubs against the seat hole, hindering the spring's movement and making it difficult for the ball valve to open and close. 3. Insufficient oil in the oil pan, with the oil level at the limit position of the oil strainer suction port, or impurities in the oil pipe that are not completely blocked, causing the oil pump to intermittently suck oil and resulting in fluctuating oil pressure. 4. Improper assembly or sticking of the pressure relief valve, causing unstable oil flow resistance, or a damaged oil pressure gauge can also lead to fluctuating oil pressure.