5 Reasons Engine Bearings Fail

Engine bearings are essential components in any combustion engine, serving as the interface between the crankshaft and the connecting rod. They support the weight of the crankshaft and provide a smooth, low-friction surface for the connecting rod to pivot on, ensuring that the engine runs smoothly and efficiently. However, like any mechanical component, engine bearings can fail, leading to costly repairs and potential engine damage.

So, what causes engine bearings to fail? There are several factors that can contribute to bearing failure, including:

Lack of lubrication

One of the most common causes of bearing failure is a lack of lubrication. Engine bearings rely on a continuous oil supply to maintain a thin film of lubrication between the bearing surface and the crankshaft. Without adequate lubrication, the bearing surface can become damaged or worn, leading to premature failure.


Contamination is another common cause of bearing malfunction. Dirt, debris, and other contaminants can get into the oil system and cause damage to the bearing surface, leading to wear and eventual breakdown. Contamination can come from various sources, including a dirty air filter, a damaged oil filter, or simply from normal engine wear and tear.


Excessive heat can also contribute to bearing failure. When an engine runs too hot, the metal in the bearings can expand, causing the bearing to lose its shape and fit. This can result in increased friction, leading to premature wear.

Improper installation

Incorrect installation of engine bearings can be another reason for bearing malfunction. If the bearings are not installed correctly or aren’t the correct size, they may not provide adequate support for the crankshaft.

Excessive wear

Over time, engine bearings will naturally wear down due to the stresses of engine operation. This wear can be accelerated by a variety of factors, including dirty oil, high mileage, and high-performance modifications.

So, how can you prevent engine bearing failure? The best way is to ensure that your engine is properly maintained. This includes regular oil changes, ensuring that the oil filter is in good condition, and checking the air filter regularly. If you notice any unusual noises or vibrations coming from your engine, have it inspected by a professional immediately.

In addition, it is important to use high-quality engine bearings that are designed to withstand the stresses of high-performance engines. Eagleharm Engineering  offers a wide range of high-quality products for maximum performance and durability. Our services expand throughout the trucking, transport, and earthmoving equipment, covering the machining of a range of different engines. Contact us and meet our team of experts who can help you find the right parts for your engine and provide the support you need to keep your engine running smoothly.

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