Spun Cam Bearing Sound: Causes, Symptoms, And Solutions

i have a spun bearing, is there an easier way of fixing it
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As a car enthusiast, it’s important to be aware of potential issues that can arise with your vehicle. One common problem that many car owners face is a spun cam bearing. This issue can cause various symptoms and affect the overall performance of your engine. In this article, we will explore the causes, symptoms, and possible solutions for a spun cam bearing.

What is a Spun Cam Bearing?

A cam bearing, also known as a camshaft bearing, is a crucial component in the engine. It supports the camshaft and ensures smooth rotation. When a cam bearing spins, it means that it has become loose or damaged, resulting in an abnormal noise and potential engine damage.

Causes of Spun Cam Bearings

Several factors can contribute to the spinning of cam bearings. One common cause is insufficient lubrication, which can occur due to a lack of regular oil changes or using the wrong type of oil. Another cause is excessive wear and tear on the bearing, often resulting from high mileage or aggressive driving habits. Additionally, manufacturing defects or improper installation can also lead to cam bearing issues.

Symptoms of a Spun Cam Bearing

When a cam bearing spins, it produces a distinct sound that can be easily identified. The noise is often described as a loud knocking or ticking sound, similar to metal hitting metal. This sound typically increases with engine speed and may become more noticeable during acceleration. Other symptoms may include decreased engine performance, rough idling, and potential oil leaks.

Diagnosing a Spun Cam Bearing

If you suspect a spun cam bearing in your engine, it’s essential to diagnose the issue accurately. A qualified mechanic can perform a thorough inspection by removing the camshaft and inspecting the bearings for signs of spinning or damage. They may also check for any metal shavings or debris in the oil, which can indicate a cam bearing problem.

Repairing a Spun Cam Bearing

Once a spun cam bearing is identified, there are a few possible solutions depending on the extent of the damage. In some cases, a simple bearing replacement may be sufficient if the damage is minimal. However, if the bearing has caused significant damage to the camshaft or other engine components, more extensive repairs may be necessary. This can involve replacing the camshaft, bearings, and potentially other affected parts.

Preventing Spun Cam Bearings

While cam bearing issues can occur unexpectedly, there are steps you can take to minimize the risk. Regular maintenance, including timely oil changes and using the recommended oil type, can help ensure proper lubrication and reduce wear on the bearings. Avoiding aggressive driving and maintaining a consistent engine speed can also help prolong the life of cam bearings. Additionally, having a professional mechanic inspect your engine regularly can help identify any potential issues before they worsen.


A spun cam bearing is a problem that can significantly impact your engine’s performance and longevity. By understanding the causes, symptoms, and solutions associated with this issue, you can stay proactive in maintaining your vehicle’s health. Remember to seek professional assistance if you suspect a spun cam bearing, as accurate diagnosis and appropriate repairs are crucial for resolving the problem effectively.