Why do Subaru rod bearings fail?
Subaru's boxer engines are known for their reliability, but one common issue that can arise is the failure of the rod bearings. This problem can lead to engine damage and costly repairs. In this article, we'll explore the key reasons why Subaru rod bearings fail and what you can do to prevent it.
Causes of Subaru Rod Bearing Failure
There are several factors that can contribute to the failure of Subaru rod bearings:
- Oil Starvation: Subaru engines are prone to oil starvation, especially in high-performance applications or when the engine is under heavy load. This can lead to insufficient lubrication of the rod bearings, causing them to wear down prematurely.
- Excessive Engine Revs: Pushing the engine to its redline too frequently can put excessive stress on the rod bearings, leading to accelerated wear and eventual failure.
- Improper Maintenance: Failing to change the engine oil and filter at the recommended intervals can allow contaminants to build up and damage the rod bearings over time.
- Manufacturing Defects: In some cases, the rod bearings themselves may have been manufactured with defects, making them more susceptible to failure.li>
It's important to note that while Subaru rod bearing failure is a known issue, not all Subaru engines will experience this problem. Proper maintenance and driving habits can go a long way in preventing this issue.
Preventing Subaru Rod Bearing Failure
To help prevent Subaru rod bearing failure, consider the following tips:
- Follow the Maintenance Schedule: Strictly adhere to the recommended oil change intervals and use high-quality engine oil to ensure proper lubrication.li>
- Avoid Excessive Engine Revs: Try to keep the engine within its optimal rpm range and avoid pushing it to the redline too frequently.
- Monitor Oil Levels: Check the oil level regularly and top it up if necessary to ensure the engine is not running low on oil.
- Consider Upgrades: For high-performance applications, consider upgrading to stronger, more durable rod bearings to better withstand the increased stress.
By following these preventative measures, you can help extend the life of your Subaru's rod bearings and avoid costly engine repairs down the line.
What causes a rod bearing to go bad?
Lack of lubrication, dirt build-up, and corrosion can damage an engine rod bearing. Overlay fatigue can also wear out your ride's rod bearing. Using sab-par oil and assembly errors can also cause a rod bearing to fail.
What causes Subaru rod bearing failure?
Why Do Rod Bearings Commonly Fail on Subarus? Well… it all has to do with oil, the oiling system, and the general small surface area of Subaru rod bearing.
What is the life expectancy of a rod bearing?
The original rod bearings should be replaced every 60-80,000 miles, especially on vehicles which followed BMW's 15,000-mile oil change recommendation.
Why do subarus throw rods?
Most thrown rods I've seen on well maintained vehicles are due to consumption issues that are all too common on subaru engines. People don't check the oil as frequently as what is responsible for a subaru, and the bearings end up getting starved.
How long do Subaru wheel bearings last?
100,000 miles
Your best bet is to consult your local experts and get the best Subaru wheel bearing out there, which, although more expensive, will last you for another 100,000 miles or more.
Why are my wheel bearings going bad?
What causes a wheel bearing to become worn? Friction can never be truly eliminated, only reduced, and over time wheel bearings themselves wear out, though the most common reason for wheel bearings to fail is that their seals let the grease out, and water and grit in, damaging the balls and tapers.
What are common faults in Subarus?
Here are some of the most common Subaru problems to look out for:
- Damaged bumper.
- Fast battery drain.
- Dings and dents.
- Broken fuel pump.
- Starlink issues.
- Cracked windshields.
- Sudden unintended acceleration.
- Electrical issues.
What is the number one cause of bearing failure?
1. Improper Lubrication. This should be one of the first reasons considered when inspecting a bearing that has failed. To ensure proper lubrication, adequate viscosity at operating temperature is a must.
Why do engine rods fail?
Simply put, lighter-weight rods may not be able to handle the increased stress and vibrations, leading to bending or breaking under pressure. On the other hand, using overly heavy rods can increase the reciprocating mass, negatively impacting engine response and potentially causing fatigue failure over time.
Does Subaru have wheel bearing problems?
Yes, it is quite common in modern Subarus to need new wheel bearings more frequently than many other vehicles. Most chalk it up to the suspension geometry since most Subarus are built to have a higher than normal ride height.
