What is the function of the oil pressure gauge?
2 Answers
The oil pressure gauge is used to detect and display the oil pressure in the engine's main oil passage to prevent major failures such as cylinder scuffing or bearing seizure due to insufficient oil. Below is a related introduction to the oil pressure gauge: 1. Oil pressure gauge: The oil pressure gauge indicates the oil pressure in the engine, helping to determine whether the lubrication system is functioning properly. It consists of an oil pressure sensor installed on the engine's main oil passage and an oil pressure indicator on the dashboard. Common types of oil pressure gauges include bimetallic, electromagnetic, and moving magnet types, with the bimetallic type being the most widely used. 2. Main causes: (1) Low oil viscosity; (2) Clogged oil pickup screen or oil filter element; (3) Weakened or broken springs in the pressure relief valve or return valve, or poor sealing at the valve interface, leading to oil leakage and pressure loss; (4) Excessive clearance in main bearings or connecting rod bearings; (5) Poor performance of the oil pump.
Having driven for decades, the role of the oil pressure gauge is crystal clear to me—it's the engine's health monitor. When you start the car, the needle on that gauge should stay within the normal range, indicating sufficient oil pressure to keep the oil flowing and lubricating the internal components. If the pressure is too low, it means inadequate lubrication, causing excessive friction in parts like the pistons and bearings. Not only does the noise increase, but it can also lead to severe wear or even engine seizure. I've seen many cases where friends ignored a dropping pressure gauge, resulting in undetected oil pump failures or leaks, ultimately costing them tens of thousands in engine repairs. High pressure can also be problematic, such as a clogged filter, though it's less common. Ultimately, this gauge is the frontline sentinel for preventing issues, reminding us to check oil levels and maintain the vehicle promptly. Making a habit of glancing at it regularly can save a lot of trouble and danger.
