top of page

How can excessive oil pressure be resolved?


The amount of resistance oil encounters as it passes through the engine's oil passageways determines oil pressure. Approximately 20 minutes after engine start-up, when the oil has attained operating temperature, the oil pressure indicator should display a constant figure. Either PSI or Bar are the units of measurement.

The appropriate oil pressure varies based on the make and model of the automobile but is often between 25 and 65 PSI. Oil pressure is necessary for the oil to be able to reach some engine components, however if the value falls outside of this range, it is typically seen as being either too high or excessively low. The size of the engine, the diameter of the bores, and the viscosity of the oil all affect oil pressure since it is dependent on the amount of resistance the oil encounters when passing through the passageways.

For the engine to be adequately protected from harm, a PSI over 80 is often regarded as too high. High oil pressure is a sign that the oil cannot adequately go through the engine's bores and reach all of its components. When an engine is improperly lubricated, it may experience immediate wear from friction, damage to its parts, and, in severe circumstances, engine failure.

Why does oil pressure rise so quickly?

  • Malfunctioning oil pressure transmitting unit:

The oil pressure transmitting unit is in charge of sensing the oil pressure and operating the dashboard's oil pressure gauge. It is typical for the oil pressure to be higher while the engine is cold. Even after the engine has had time to warm up, the oil gauge may be broken if the reading is still at its maximum level. A mechanic or a homeowner can use a manual oil pressure tester to diagnose this.

  • Oil filter that is dirty or contaminated:

The oil filter is used to remove contaminants from engine oil. Dust, soot, rust, and gum particles accumulate in the filter over time and start to block the system. Higher resistance and increased oil pressure result from this.

  • Blocked passageways:

After passing through the filter, the oil travels through a number of routes before reaching the crankshaft. All of the engine's components would not be adequately and efficiently lubricated by the oil if these passageways were to get closed. One possible cause of high oil pressure is the difficulty the oil has moving through a partly or totally blocked route.

  • Failure of the relief valve:

A relief valve is designed to allow oil to flow when the pressure builds up. These valves are often programmed to open and let oil pass once the pressure exceeds a specified PSI. The oil pressure can quickly increase to a level that is unsafe for the engine to operate if the relief valve malfunctions.

  • Oil quality and viscosity:

Oil pressure rises when it is thicker, or more viscous, since it encounters more resistance when moving through the engine's channels. The oil pressure changes as the viscosity grade is changed to a thicker or thinner oil. It may not be the right oil for your engine if it is either too viscous or not viscous enough. Oil pressure is also impacted by the engine's temperature. The oil pressure in the engine may be higher than usual during startup because oil thins out as it warms up and thickens as it cools down. To obtain an accurate PSI reading, it is advised to wait 20 minutes after starting the engine.

12 views0 comments
bottom of page