High oil pressure is caused by an increase in the temperature of motor oil. Oil pressure is determined by the rate that oil flows through the internal combustion engine of a car. When oil pressure increases, the flow of oil decreases.
Cars are more prone to an increase in oil pressure when first starting. The engine temperature rises quickly when a car is started, and that causes the oil temperature to rise as well. As the car continues to run, the temperature of the oil will continue to rise unless the pressure relief value regulates the temperature. When an engine overheats, or the pressure relief valve malfunctions, oil pressure rises significantly, which causes engine failure.Learn More
A gas odor in engine oil is caused by contamination of the engine oil by gas, usually due to a leaking fuel line or malfunctioning fuel injectors. However, it is normal for a small amount of gas to get into the engine oil during normal engine operation.Full Answer >
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.Full Answer >
Test an oil pressure unit using a multimeter that is set to resistance with the engine off. Test the unit again with the engine running. The process takes only a few minutes.Full Answer >
A car's oil pressure sending unit detects the amount of oil pressure in a car's engine and sends that information to the car's instrument panel. It allows the driver to monitor oil pressure and receive a warning of dangerous pressure levels.Full Answer >