What is the most common problem with Subaru engines?
As an experienced auto service provider, I often encounter various issues with different car brands. Subaru vehicles, known for their reliability and all-wheel-drive capabilities, are no exception. However, they do have some common engine problems that owners should be aware of. In this article, we will explore these issues and provide insights on how to address them effectively.
Common Engine Problems in Subaru Vehicles
Subaru engines, particularly the popular flat-four (boxer) engines, can experience specific issues that may affect performance and longevity. Here are some of the most prevalent problems:
- Head Gasket Failure: One of the most notorious issues with Subaru engines is head gasket failure. This problem often arises in older models and can lead to coolant leaks, overheating, and significant engine damage if not addressed promptly.
- Oil Consumption: Many Subaru owners report excessive oil consumption, particularly in models equipped with the 2.5-liter engine. This can lead to low oil levels and potential engine damage if not monitored regularly.
- Timing Belt Issues: The timing belt is crucial for engine operation, and if it fails, it can cause severe engine damage. Regular maintenance and timely replacement are essential to prevent this issue.
- Knocking Noise: Some Subaru engines may develop a
As the owner of Kevin's Autos, an auto service shop with years of experience in car maintenance and repair, I've seen my fair share of engine issues. One of the most common problems we encounter with Subaru engines is the dreaded head gasket failure.
What is a Head Gasket?
The head gasket is a critical component in an engine, responsible for sealing the cylinder head to the engine block. It ensures that the combustion process remains contained, preventing the leakage of coolant or oil. When a head gasket fails, it can lead to a range of problems that can significantly impact the performance and longevity of a Subaru engine.
Why Do Subaru Head Gaskets Fail?
Subaru engines, particularly the popular boxer-style engines, are prone to head gasket issues for a few key reasons:
- Flat Engine Design: Subaru's boxer engines have a flat, horizontally-opposed cylinder layout, which can put more stress on the head gaskets over time.
- Coolant Leaks: Subaru engines are known to experience coolant leaks, which can lead to overheating and premature wear on the head gaskets.
- Older Engine Designs: Some older Subaru models, such as the Legacy and Outback from the 1990s and early 2000s, were more susceptible to head gasket failures due to design flaws.
Symptoms of a Failing Head Gasket
If you own a Subaru, it's important to be aware of the signs of a failing head gasket. Some common symptoms include:
- Coolant Leaks: Visible leaks around the engine or a low coolant level can indicate a head gasket issue.
- White Exhaust Smoke: If you notice white, steam-like exhaust smoke, it could be a sign of coolant mixing with the engine oil.
- Engine Overheating: A head gasket failure can cause the engine to overheat, as the coolant system is compromised.
- Oil Contamination: If the engine oil appears milky or discolored, it may be a sign of coolant mixing with the oil.li>
Preventing and Addressing Head Gasket Failures
To prevent and address head gasket failures in Subaru engines, it's important to follow a regular maintenance schedule, including timely coolant flushes and engine oil changes. If you suspect a head gasket issue, it's best to have your vehicle inspected by a qualified mechanic as soon as possible to avoid further damage to the engine.
At Kevin's Autos, we have extensive experience in diagnosing and repairing Subaru head gasket problems. Our team of skilled technicians can provide a thorough inspection, identify the root cause, and recommend the best course of action to get your Subaru back on the road safely and reliably.
Frequently Asked Questions
Which Subaru engine is the most reliable?
EJ22. Considered "bulletproof," the EJ22 is often called Subaru's most reliable engine. It's a 2.2-liter four-cylinder boxer engine, and the estimated life of the EJs is over 250,000 miles, with many drivers reporting over 500k.
What year does Subaru have a bad engine?
Subaru WRX and WRX STI: 2008-2014 Models
The performance-oriented Subaru WRX and WRX STI from 2008 to 2014 unfortunately did not escape their own set of difficulties. These cars were plagued with engine problems.
What is the life expectancy of a Subaru engine?
200,000 miles
Engine Lifespan: Subaru engines are known for their durability and longevity, with many drivers reporting engines that last well beyond 200,000 miles with proper maintenance. The key to extending the lifespan of your Subaru engine is regular maintenance, including oil changes, fluid checks, and tune-ups.
Which subarus have engine problems?
Subaru FA and FB series engines that have inverted spin-on oil filters mounted on the top of the engine, suffer from a prolonged dry start due to oil draining from the feed and output side of the oil filter at engine shutdown.
What is the biggest problem with subarus?
Transmission issues are the most common problem in Subarus, but defective airbags, faulty fuel pumps, weak windshields, and electrical issues are also known to happen. Subarus generally receive high reliability ratings, according to RepairPal. Transmission issues are the most common problem in Subarus.
Why does Subaru have a bad reputation?
Issues such as engine problems, failing oxygen sensors, Takata airbag recalls, transmission concerns, and rodent-attractive wiring can affect various Subaru models.
What is the controversy with Subaru?
According to the class action lawsuit, Subaru equipped some of its vehicles with defective Denso fuel pumps that could cause low pressure, leading to engine stalling, sputtering, shutdown, and, possibly, a crash. The long-running Subaru fuel pump lawsuit has lasted for nearly four years.
Which Subaru engine is most reliable?
EJ22. Considered "bulletproof," the EJ22 is often called Subaru's most reliable engine. It's a 2.2-liter four-cylinder boxer engine, and the estimated life of the EJs is over 250,000 miles, with many drivers reporting over 500k.
Do subarus last as long as Toyotas?
And, Toyota was awarded the most reliable brand at the 2021 Auto Trader New Car Awards. Also, Toyota's can last well past 300,000 miles (think of the million-mile Tundra), while Subaru typically lasts around 200,000 miles.
What year did Subaru stop using timing belts?
2011 was the first year for the newest version of the 2.5L normally aspirated engine. Years previous to 2011 the 2.5L, as did all Subaru flat four engines, used a timing belt. Beginning in 2011 the 2.5L uses a timing chain.
