What Are the Causes of Insufficient Oil Pressure?
1 Answers
The causes of insufficient oil pressure include the following points: 1. Insufficient oil quantity in the oil pan. When the oil quantity is insufficient, the oil pump's pumping capacity decreases, and it may even suck in air. The oil should be replenished according to the specified amount. If the insufficient oil is caused by oil burning or leakage, the issues of oil burning or leakage should also be addressed. 2. The oil quality does not meet the requirements. Different engine models require different grades of oil, and even the same engine model may use different brands of oil in different seasons. Using the wrong oil often leads to issues such as excessively thin oil viscosity and insufficient lubrication. Always use oil as specified. 3. Fuel or water mixing into the oil. If fuel mixes into the oil, it will dilute the oil; if water mixes into the oil, it will cause the oil to emulsify and deteriorate. Both scenarios reduce the oil's lubrication effectiveness. The oil must be replaced, and the causes of fuel or water mixing into the oil should be identified and resolved. 4. Excessive oil temperature. When the cooling system has severe scaling, poor heat dissipation, or prolonged overload operation leading to high engine temperatures, the oil may become thin. If the clearance between the cylinder liner and piston is too large, high-temperature gas from the cylinder can enter the crankcase, raising the oil temperature and thinning it, making it easier to leak from the friction pair's clearance. 5. Clogged oil filter screen or air leakage in the oil intake line. When the oil strainer screen is clogged, the oil pump cannot draw in enough oil. If the oil intake pipe has cracks, the gasket is uneven or not tightened, or the joint surface between the pump body and the engine block is uneven or the gasket is damaged (as in single-cylinder diesel engines), the oil pump may suck in air. These issues can all lead to insufficient oil pressure.
