Why do subarus throw rods?
As a seasoned auto service provider, I often encounter questions about specific vehicle issues, and one that frequently arises is why Subarus, in particular, are known to experience rod failure. Understanding the mechanics behind this problem can help Subaru owners take preventive measures and maintain their vehicles effectively.
Understanding Rod Failure in Subarus
Rod failure, commonly referred to as "throwing a rod," occurs when a connecting rod in the engine breaks or becomes detached. This can lead to catastrophic engine damage. Subarus, especially those with turbocharged engines, are sometimes more susceptible to this issue due to several factors:
- Engine Design: Subaru engines are known for their unique boxer design, which can create specific stress points that may lead to rod failure if not properly maintained.
- Turbocharging: Many Subaru models come equipped with turbocharged engines. While turbocharging can enhance performance, it also increases the stress on engine components, including the connecting rods.
- Oil Quality and Maintenance: Regular oil changes and using high-quality oil are crucial. Poor oil quality or infrequent changes can lead to inadequate lubrication, causing increased wear and tear on the rods.
- Overheating: If the engine overheats due to cooling system failures or other issues, it can weaken the rods and lead to failure.
- High RPMs: Driving habits that involve frequent high RPMs can put additional stress on the engine, increasing the risk of rod failure.
Preventive Measures
To minimize the risk of throwing a rod in your Subaru, consider the following preventive measures:
- Regular Maintenance: Adhere to the manufacturer's recommended maintenance schedule, including oil changes and inspections.
- Monitor Engine Temperature: Keep an eye on your engine temperature gauge and address any overheating issues immediately.
- Use Quality Oil: Invest in high-quality engine oil that meets or exceeds the specifications for your vehicle.
- Avoid Aggressive Driving: Practice smooth acceleration and avoid excessive revving of the engine.
Conclusion
Understanding why Subarus may throw rods can empower owners to take proactive steps in vehicle maintenance. By being aware of the factors that contribute to rod failure and implementing preventive measures, Subaru owners can help ensure the longevity and reliability of their vehicles.
Frequently Asked Questions
What is the biggest problem with Subaru engines?
One of the most notorious issues plaguing Subaru vehicles is head gasket leaks, particularly in older models with the EJ series engines. These leaks can lead to coolant loss, overheating, and potential engine damage if left untreated.
Why do subarus throw rod bearings?
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. Oil contamination or “dirty oil” causes little scratches or scoring on the bearings which impedes them from keeping a consistent oil film.
Can a thrown rod be fixed?
The only solution is an engine rebuild where you pull the rods and replace the bearings. It's likely that the flailing rod damaged the crank journal surface, so you'll definitely need the crank polished and most like turned.
What causes your engine to throw a rod?
A lack of lubrication can lead to the binding of piston rings as well as a heat build-up within a piston's skirt, which ultimately leads to thermal expansion. If oil starvation is severe enough, low oil pressure will result, causing excess wear to main and rod bearings.
How many miles 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 do Subarus have hood scoops?
Hood scoop functions
The high operating temperatures in the engine compartment result in intake air that is 28°C (82°F) or warmer than the ambient temperature and consequently, less dense. A hood scoop can provide the engine with cooler, denser outside air, increasing power.
Why do EJ25 engines fail?
The EJ25 engine is an interference engine, meaning that if the timing belt fails, it can cause significant engine damage. The water pump is also a critical component that can fail and cause overheating. Replacing the timing belt and water pump at regular intervals is recommended to prevent these issues.
How much does it cost to fix a thrown rod?
So, how much are engine rod repair costs? On average, expect to spend between $2,000-$3,000 for both parts and labor.
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 year does Subaru have a bad engine?
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. Such problems included bearing failure in the EJ series of engines, leading to a major engine rebuild or replacement.
