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You are here: Home / Blog / What Causes High Oil Pressure

What Causes High Oil Pressure

May 4, 2021 By Jeffrey Thomsen Leave a Comment

What Causes High Oil PressureHigh oil pressure (or oil pressure reading) in a car engine is one of the worst things that could happen to a car. If this is your situation, read on to find out what a high oil pressure reading is, identify the common symptoms, find the causes, and then how to repair it all back to good normal.


You will need to know why oil pressure is high. This is important so you know what steps to take when it happens. Failure to address this situation could lead to serious and irreversible damage to your engine.

Table of Contents

  • What is the first thing to understand?
    • Causes of high oil pressure
    • What will a professional do?
    • Another possible reason …

What is the first thing to understand?

Your car’s oil has a certain amount of viscosity. The higher the viscosity, the lower the oil pressure. Higher levels of viscosity also mean a faster flow of oil, which leads to an increased level of friction and heat. One of the ways this can occur is through a build-up of mineral deposits inside the oil filter. Another way is because the oils used in your engine may be too thin or not being replaced enough.

Causes of high oil pressure

There are many potential causes for what causes high oil pressure. One of them is blockages in the oil passages. These blockages prevent oil from flowing correctly and can eventually lead to clogging and pressure loss.

Another cause is excessive wear of the seals on the bottom of your engine. Seals allow oil to pass through smoothly, but if they are worn they can no longer trap oil and prevent the oil from flowing freely.

So what do you do when your car engine starts giving you high oil pressure warning lights? Most cars have a generic “manual” method for changing the oil. In many cases, you simply pull the plug out and put another in. This is easy enough, but it doesn’t address the problem of what causes high oil pressure.

If you have a manual and you are at least somewhat familiar with what causes high oil pressure, then you might try checking out the following solutions. If no, move to the next option.

Your first logical step would be to go and see your mechanic. After all, they are trained to check things like your oil filters and other parts of your engine. Checking your mechanic’s credentials before you make any changes to your own engine is always a good idea. If your mechanic can’t do it for you, then you should call a hydraulic fluid service center or some type of hydraulic fluid mechanic.

What will a professional do?

Your engine likely has a low oil pressure signal. The first thing your mechanic will want to do is to increase the compression rate in your engine. The more compression you put into your engine, the higher the oil pressure will be.

While this may sound like something that will help with high oil pressure damage, it will also cause serious damage to the bearings components of your transmission.

Next, your mechanic may decide that your transmission’s O-ring needs to be changed. This usually means that your vehicle’s fuel system will now be under the influence of an electro-mechanical seal. The O-ring, which is designed to keep your combustion chambers clean, is designed to be easily removed.

However, it is very difficult to find one that will fit properly, as most cars have different ring sizes. Also, when this type of seal wears down, it starts to cause pressure loss. This can lead to both high pressure and low pressure, which can lead to damage to your engine.

Another possible reason …

Finally, if you have identified that your engine’s transmission fluid is the problem behind the low oil pressure gauge, then your next step is to determine what the proper amount is. Typically, this will be determined by checking your oil pressure gauge. If it shows a constant, high number, then you should increase the amount of compression.

If it shows a constant, low number, then you should decrease the amount of compression. Either way, be very careful when changing your transmission fluid, as it is extremely dangerous. If the engine overheats, the high pressure can quickly lead to burning and even engine death if you are not careful.

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