When should Subaru head gaskets be replaced?
Subaru vehicles are known for their reliability and performance, but like any car, they have their quirks. One of the most common issues Subaru owners face is head gasket failure. In this article, we’ll explore when you should consider replacing the head gaskets on your Subaru, the warning signs to watch for, and tips to extend the life of your engine.
Understanding Subaru Head Gasket Issues
Subaru engines, particularly those with the EJ25 engine (commonly found in models like the Outback, Forester, and Legacy from the late 1990s to early 2010s), are prone to head gasket problems. This is due to the unique design of Subaru’s boxer engines, where the head gaskets are positioned horizontally, making them more susceptible to wear and tear over time.
When Should You Replace Subaru Head Gaskets?
There isn’t a one-size-fits-all answer to this question, as the timing for head gasket replacement depends on several factors, including the model year, driving habits, and maintenance history. However, here are some general guidelines:
- High Mileage: Head gaskets typically fail between 100,000 and 150,000 miles. If your Subaru is approaching this range, it’s a good idea to have the gaskets inspected during routine maintenance.
- Visible Symptoms: If you notice signs of head gasket failure (discussed below), replacement should be done immediately to prevent further engine damage.
- Preventative Maintenance: Some Subaru owners choose to replace the head gaskets proactively when performing other major engine work, such as timing belt replacement, to save on labor costs.
Signs Your Subaru Head Gaskets May Need Replacement
It’s crucial to recognize the warning signs of a failing head gasket early to avoid costly repairs. Here are the most common symptoms:
- Overheating: A blown head gasket can cause coolant to leak, leading to engine overheating.
- Coolant and Oil Mixing: Check your oil dipstick or coolant reservoir for a milky substance, which indicates contamination.
- Exhaust Smoke: White smoke from the exhaust could mean coolant is leaking into the combustion chamber.
- Loss of Power: A failing head gasket can reduce engine compression, leading to decreased performance.
- External Leaks: Look for oil or coolant leaks around the cylinder head area.
How to Extend the Life of Your Subaru Head Gaskets
While head gasket failure is a known issue, there are steps you can take to prolong their lifespan:
- Regular Maintenance: Keep up with oil changes, coolant flushes, and other routine services to ensure your engine stays in good condition.
- Use High-Quality Fluids: Always use the manufacturer-recommended oil and coolant to prevent premature wear.
- Monitor Engine Temperature: Avoid driving your car if it’s overheating, as this can exacerbate head gasket issues.
- Drive Gently: Aggressive driving can put extra stress on the engine and its components.
Final Thoughts
Replacing Subaru head gaskets is a significant repair, but addressing the issue promptly can save you from more extensive engine damage down the road. If you suspect your Subaru’s head gaskets are failing or if you’re nearing the mileage range for potential failure, don’t hesitate to schedule an inspection with a trusted mechanic. At Kevin’s Autos, we specialize in diagnosing and repairing Subaru vehicles, ensuring your car stays reliable for years to come. Contact us today to learn more!
Frequently Asked Questions
How do I know when my head gasket needs replacing?
If your engine is suffering from a bad head gasket, you may experience the following:
- The engine is difficult to start.
- Rough when idling.
- Oil and/or coolant leaking.
- Engine overheating or hotter than normal.
- Coolant reservoir gurgling sound.
- Check engine light.
- The smell of oil in the cabin.
Should I replace my Subaru head gasket?
You will know there is an issue with the head gaskets if you see; excessive amounts of white smoke, your engine is running rough, the check engine light is on, low coolant levels, or when your engine oil starts to get a milky appearance.
Are Subarus notorious for blowing head gaskets?
The term 'blown head gasket' seems to be regularly used amongst Subaru owners and enthusiast chat groups. The fact is, rarely does the post Year 2000 Subaru blow the head gasket. Before 2000 it could happen, but it still wasn't a common problem.
What year are Subaru engines bad?
1996-2005. For the 1996 through 2005 model years, many different models of Subaru vehicles experienced oil leaks and issues related to a faulty head gasket. The gaskets were not holding a tight seal and were causing oil to either leak into the combustion chamber or out of the engine itself.
How long do head gaskets last on a Subaru?
between 100,000 and 150,000 miles
How long will a head gasket repair last? The original head gaskets on a Subaru 2.5 engine tend to fail between 100,000 and 150,000 miles. Most replacement gaskets last just as long.
Can a head gasket last 300k miles?
The average head gasket has a life expectancy of 200,000 miles, but they can blow on a new vehicle if there's an engine issue.
At what mileage should a head gasket be replaced?
Overheating: If an engine overheats, it can lead to head gasket failure, necessitating replacement. Generally, head gaskets last anywhere from 100000 to 200000 miles but can fail prematurely if any of the above factors are not managed well.
How much is a Subaru head gasket job?
The cost of replacing a head gasket on a Subaru starts around $3,000.
How do I know if my Subaru needs a head gasket?
- Overheating Engine : - If the engine temperature gauge is consistently high, this could indicate a blown head gasket.
- Loss of Coolant : - Check for coolant leaks or a significant drop in coolant levels without visible leaks.
- White Smoke from Exhaust : - If you see white smoke coming from the exhaust, it may
What years of Subarus have head gasket problems?
The Subaru Head Gasket Problem
A number of Subaru models are affected, however the most common failures include the 2.5 Liter SOHC engine used in the late 1999-2004, Forester, Impreza, Outback and Legacy. Signs and symptoms of engine head gasket failure include: Engine overheating.
