The most likely cause of a car losing oil pressure when it warms up is a problem with the pressure relief valve, which regulates the oil pressure to ensure that there is enough pressure to circulate oil throughout the engine. When oil pressure is low, not enough oil is being distributed to the engine, potentially causing engine failure.Know More
To a certain extent, it is normal for a car to have low oil pressure when first starting. However, within 20 minutes, the oil pressure should be regulated, and the needle on the oil pressure gauge should rest at the midpoint. If the oil pressure remains low, have the oil pressure relief valve inspected by a mechanic.
It is also possible that the oil pump is malfunctioning, which is responsible for regulating the flow of oil. The resistance to the flow of oil is what causes oil pressure. If the oil pressure is low, the fuel flow is low. This is a major problem that needs to be fixed immediately, since the engine needs to be lubricated adequately to function properly.
Other causes of low oil pressure include excessive bearing clearance, a blockage in the oil delivery lines, a worn crankshaft and air in the oil pump.Learn more about Engine Oil
The symptoms of a bad oil pump are many, and some of them include abnormally noisy hydraulic lifters, valve train noise, a higher operating temperature in the engine, a decrease in the oil pressure of the car and a noise in the oil pump. An oil pump is one of the components of a car that does not require frequent servicing and repairs, but when it fails, it can cause catastrophic impact on the performance of the car.Full Answer >
High oil pressure occurs when an unusually high amount of pressure is required to circulate oil through the engine of a car. Most cars have oil pressure gauges that show how much pressure is used to circulate the oil. After a car runs for approximately 20 minutes, the needle on the gauge should settle at the midpoint. If it settles toward the top of the gauge, this indicates high oil pressure.Full Answer >
If too much oil is put into a car, it starts to leak when the engine runs. This leakage is due to excess pressure generated by the oil pump and crankcase placing strain on the seal on the rear main bearing.Full Answer >
The time frame for replacing engine oil varies by car, but in general oil should be replaced every 5,000 to 7,500 miles, advises How Stuff Works. Various factors such as the type of vehicle and driving conditions make a difference, so the vehicle's user manual provides the most accurate instructions.Full Answer >