What to Do When Engine Oil Pressure is Too High?

2 Answers
AaliyahMarie
07/24/25 9:53am
Solutions for excessive engine oil pressure: 1. If a long-used diesel engine shows excessive oil pressure, it indicates that the fine oil filter is clogged and should be cleaned. 2. If the diesel engine has excessive oil pressure at low temperatures, but the oil pressure returns to normal when the engine temperature rises, it means the excessive oil pressure is caused by the diesel engine being too cold. 3. If the oil pressure becomes significantly too high after changing the oil, it indicates that the wrong oil grade was selected. For example, using oil with a higher viscosity in winter can cause excessive oil pressure. Replacing it with oil suitable for the season is necessary. 4. If the oil viscosity is too high, it indicates greater internal friction resistance during oil flow. Oil viscosity is related to engine temperature—when the engine temperature is low, the oil viscosity is high. 5. When the engine temperature is high, the oil viscosity decreases. High oil viscosity results in poor fluidity but better sealing and less leakage. If the oil viscosity exceeds the specified value, the flow resistance in the lubrication system will increase, leading to higher pressure.
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ORafael
08/11/25 5:06am
When I notice the engine oil pressure is too high, I don't panic immediately—there must be something wrong. The most common causes are either too much oil or using oil that's too viscous, especially in cold winter temperatures. I usually park and check the dipstick myself; if the oil level exceeds the standard mark, I drain some out. If the oil viscosity isn't right, I switch to the manufacturer-recommended grade and avoid randomly choosing brands. Additionally, a clogged oil filter can also cause high pressure—last time, replacing the filter solved the problem. If that doesn't work, it might be a faulty pressure regulator or an issue with the oil pump, which requires a mechanic's attention. High pressure can seriously damage the engine, leading to oil leaks or burnt components. My advice is to address it quickly—safety first.
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