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Home >   How To >   How to Repair Oil Pump

How to Repair Oil Pump


The oil basically functions as a lubricant that ensures a smooth movement between the metal parts of the engine while preventing them from overheating. This page explains the significance of oil pump in maintaining the engine parts.


  Symptoms of a Faulty Oil Pump


Oil Pump    


Function of an Oil Pump


The oil pump compresses the oil and sends it to the various parts of the internal combustion engine. It is usually located in the oil pan or on the side of the engine block. When the pump operates, oil is drawn from the reservoir or sump and pressurized. It is then passed to the rotating bearings, sliding pistons and camshafts of the engine, as well as other minor parts of the engine. The compressed oil forms a film between the surfaces of the parts of the engine to prevent any metal-to-metal contact. Oil is critical to the engine since it prevents the friction that is created through the movement of the different parts. Oil also plays a role in the cooling of the engine and transmission, as well.


The pump can be driven by different engine components such as the timing belt or gears, which are in turn powered either by the camshaft or the crankshaft. An oil filter is included in the engine system to filter out the debris carried by the oil in the course of its function. Usually, a sensor is also included in the oil system to monitor the pressure of oil flowing through the engine components.


Causes and Symptoms of a Faulty Oil Pump


The oil pump when properly maintained can deliver an ideal performance for a long time. It is recommended to change the engine oil, usually between 3000 to 4000 miles, or as suggested by the manufacturer.


Problems with an oil pump can cause it to induce a pressure that is lower or higher than the requisite pressure in the oil. In either case, it will not lubricate the engine properly. A defective oil pump is sometimes indicated by a low-pressure light in your car's instrument panel. However, this can also be due to a low level of oil in the reservoir due to leaks in any parts. A bad oil pump will not provide the sufficient pressure needed to protect the engine components, resulting in a metal-to-metal contact between them. This will wear down the engine parts prematurely. An obvious symptom of a bad oil pump is a low oil pressure reading in the pressure gauge, even if the oil level is at its optimum. A faulty oil pump will also cause the Check Engine light to glow. Increased engine temperature, noisy hydraulic lifters, valve-train chatters and oil pump noises are some of the other indications of a defective oil pump.


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