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oil pressure gauge goes up and down while driving
Oil pressure gauge with alarm is because to indicate whether the oil pressure of the engine is normal. After the engine starts, the oil indicator rises under the action of the oil pressure, indicating that the oil pressure is normal. After the engine is turned off, the oil pressure drops and returns to zero. It will fall under the action of its own gravity and spring force.
Oil pressure alarm content introduction:
1. The lubricating oil in the oil pan is insufficient, the lubricating oil is improperly marked or the viscosity is low; the anti-foaming performance of the lubricating oil is poor, causing air to enter the oil circuit; 2. The diaphragm of the oil pump is broken, gasoline leaks into the oil pan, or cooling water leaks into the oil bottom Shell, lubricating oil diluted due to damaged cylinder head gasket or cracked liner. What causes the oil pressure warning light and warning light to flash? -Mechanical aspects1. The oil pressure limit valve is not adjusted, the spring is too soft or broken, and the oil return valve leaks.
2. The gasket of the lubricating oil filter is damaged, the bypass valve is not sealed, the spring is broken or the pressure is insufficient.
3. The lubricating oil inlet pipe joint is loose or the oil pipe is broken.
4. The end face clearance of the oil pump is too large, the rotor meshing clearance is too large or the shaft and bearing clearance is too large, resulting in low oil pressure and poor oil pumping of the oil pump.
5. All sealing surfaces, valves and pipeline joints are not tightly sealed and leak oil.
6. Leakage or severe blockage of the oil filter, and large sludge deposits due to untimely cleaning and poor cleanliness of the lubricating oil lead to serious blockage of the filter.
7. The wear clearance of crankshaft main bearing, connecting rod bearing or camshaft bearing is too large.
8. The oil pressure gauge or oil sensor plug is not working properly or damaged. The above is the oil pressure warning light shared by the editor of this site.
What is the reason for the flashing warning light?
Any of the factors mentioned by the repair editor may cause the oil pressure at the pressure measuring point of the lubrication system to be too low and the red light to light up. If the car is in good condition and the red light appears just after changing the lubricating oil, it is usually related to the selection of the viscosity level of the lubricating oil.
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