How to Fix Excessive Crankcase Pressure

To fix excessive crankcase pressure, first determine the cause and then replace faulty parts or components. Excessive crankcase pressure can cause serious damage to the engine.

The pressure can lead to oil leaks, seal damage, and engine oil being forced out through the dipstick or other seals. It can also cause a loss of power in the engine. There are several causes of excessive crankcase pressure, including a clogged pcv valve, worn piston rings, damaged cylinder walls, or a blocked oil passage.

It is important to address the issue promptly to prevent further damage. In this article, we will discuss the causes of excessive crankcase pressure and how to fix them.

Understanding Excessive Crankcase Pressure


Excessive Crankcase Pressure

Crankcase pressure is a commonplace term in engine mechanics, referring to the amount of pressure generated in the crankcase. Its primary function is to provide lubrication, ensuring that engines perform optimally. However, excessive pressure can be a cause for worry, leading to dire consequences.

Excessive crankcase pressure can occur due to several factors such as a blocked crankcase ventilation system, worn or damaged piston rings, and clogged oil passageways. Symptoms of an engine with excessive crankcase pressure may include irregular idling, smoking of the engine, and decreased engine performance.

If left unchecked, excessive crankcase pressure could lead to failure resulting in prolonged engine damage. As such, it is essential to have regular maintenance checks and promptly address any issues of engine pressure.

Common Causes Of Excessive Crankcase Pressure

Excessive crankcase pressure can lead to engine damage if not addressed. Fortunately, there are several common causes of this issue. Worn piston rings can allow too much combustion gas into the crankcase, leading to pressure buildup. A clogged or dirty pcv valve can also cause excessive pressure due to restricted airflow.

A faulty positive crankcase ventilation system can cause pressure to build up as well. Incorrect oil viscosity can also be a factor, as thicker oil can lead to increased pressure. Finally, damaged engine gaskets can contribute to excessive crankcase pressure.

If you suspect any of these issues, it’s important to have your vehicle inspected and repaired promptly to avoid further damage to your engine.

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Methods To Fix Excessive Crankcase Pressure

Excessive crankcase pressure is a common problem that can cause engine troubles. One method to fix this issue is to repair or replace worn piston rings. Another option is to clean or replace the pcv valve. Faulty positive crankcase ventilation systems are also a potential culprit that can be fixed.

Oil viscosity is another consideration that can impact excessive crankcase pressure. Finally, damaged engine gaskets can be repaired or replaced to alleviate this problem. By utilizing these various methods, you can help alleviate the symptoms of excessive crankcase pressure and keep your engine running smoothly.

Preventing Excessive Crankcase Pressure

Preventing excessive crankcase pressure is an essential component of regular engine maintenance. To keep your engine running smoothly, it is crucial to establish a maintenance schedule and stick to it. Additionally, checking the pcv valve on a regular basis can prevent your engine from developing too much pressure.

Using the correct oil viscosity is equally important for your engine; to avoid causing more pressure to build up, always use the oil recommended by your manufacturer. Furthermore, avoiding over-filling the oil in your engine and following proper break-in procedures will ensure that your engine runs efficiently without generating excessive crankcase pressure.

Remember to consult your owner’s manual for any additional maintenance guidelines specific to your vehicle.


To sum up, excessive crankcase pressure is a serious problem that not only affects the environment but also your vehicle’s performance. It could lead to expensive repairs and cause irreparable damage if not fixed on time. The good news is that you can fix it yourself by identifying the cause and applying appropriate solutions.

By following the steps outlined in this article, you can easily fix excessive crankcase pressure without breaking the bank. Remember to check your engine oil regularly, replace the pcv valve periodically, and clean the air filter to avoid crankcase pressure build-up.

With proper maintenance, you can keep your engine in good condition and prevent future problems. Let us know in the comment section how you were able to tackle excessive crankcase pressure in your vehicle.