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oil pressure gauge low at idle
When idling, the engine oil pressure is low, which may be due to the following reasons:
1.There is a problem with the engine oil pump.
2.The glaze in the crankcase is too low.
3. The engine oil does not meet the requirements, and the viscosity is too low, that is, the engine oil it's too thin.
Among them, the most common problem is that the engine oil is too thin because it does not meet the requirements of high viscosity and low viscosity. For example, use what needs to be true is to add 5w40 engine oil. As a result, this situation is likely to occur when 5W30 engine oil is added.
The oil pressure is continuously too low：
Whether the engine is at low speed or high speed, low temperature or high temperature, the oil pressure gauge always indicates below 01mpa, accompanied by the flashing of the oil pressure alarm light, which is the diagnosis / inspection and treatment method of low oil pressure
1. Unscrew the oil dipstick to see whether the oil in the oil pan is enough and whether the oil is too thin.
2. Check whether the oil pressure gauge and the sensing plug are out of order. Remove the sensing plug wire and directly ground it. At this time, if the oil pressure returns to normal (or remove the sensing plug and briefly start the engine) or the oil conglomerates spray out, the pressure is sufficient and the finger cannot press it, it indicates that the sensing plug is damaged.
3. Replace the test with a good oil pressure gauge. If the oil pressure is normal, the original oil pressure gauge is damaged.
4. Check whether the oil pipe is broken, whether the pressure limiting valve is stuck, whether the oil filter is blocked, etc. (remove the oil sensing plug, briefly start the engine, and if there are bubbles in the center of the oil ejected from the oil passage, it indicates that the oil inlet pipe is in air).
5. Check the oil pump for serious wear the oil pressure decreases as the engine speed increases when the engine is running at a reading speed, the indication of the oil pressure gauge is normal; After increasing the speed, the indication of the oil pressure gauge increases slightly, then decreases or even tends to dry to zero; turn after the speed is reduced, the indication of the oil pressure gauge becomes dry and normal.
6. Focus on checking whether there are cloth pieces, paper pieces and flocculent sundries left in the oil pan, because the suction of the oil pump is small when the engine is idling block, paper and other materials are dried at the bottom of the oil pan of the machine, and the oil supply is normal: when the engine 2 and the rotating speed are increased, the suction of the oil pump increases, and the cloth, paper and flocculent sundries are adsorbed on the filter screen of the oil collector filter, so that the oil supply is not smooth and the oil pressure decreases
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