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What are the reasons for the oil pump failing to draw oil?

1 Answers

GageFitz

07/30/25 9:31am

Oil pump failing to draw oil may be due to low oil level, excessively low oil temperature, insufficient suction force of the oil pump, or blockage in the suction pipe. Below are the reasons for the oil pump failing to draw oil: Low oil level: The oil level is too low, exposing the suction pipe. If the oil level is too low, the suction pipe of the oil pump is exposed above the oil surface, making it impossible to draw oil even with strong suction. It could also be because the position of the suction pipe is too high, leading to the oil pump's inability to draw oil. It is necessary to add oil immediately and avoid continuing to drive. Turn off the vehicle and park it on a flat surface. Wait for about ten minutes, then open the oil filler port and add oil of the same type as the original until the oil level reaches the middle position between the upper and lower marks on the dipstick. Stop adding oil at this point. Excessively low oil temperature: Excessively low oil temperature causes the oil's viscosity to decrease. Under normal temperature, oil is in a semi-solid state. Once the oil temperature drops, the oil tends to become more solid. This creates significant resistance during the oil pump's operation, which is why the oil pump cannot draw oil. Inspect related components promptly and resolve the issue as soon as possible to prevent minor problems from escalating into major faults. Insufficient suction force of the oil pump: The suction force of the oil pump is not strong enough. The oil pump relies on strong suction to draw oil from outside the suction pipe. If the suction force is insufficient, it becomes difficult to draw oil from a low position to a higher one. It is recommended to check the voltage of the fuel pump. For imported or joint-venture compact cars, the oil pump cannot be repaired and must be replaced with a new one. Blockage in the suction pipe: The suction pipe is blocked. A clear suction pipe is essential for the metering diaphragm pump to draw oil. If the suction pipe is obstructed by foreign objects, the oil pump cannot draw oil. Inspect the suction pipe and remove any foreign objects.

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