When should I replace my Subaru head gasket?

When to Replace Subaru Head Gasket
The timing for replacing a Subaru head gasket can vary based on several factors, including the specific model, usage, and maintenance history. However, there are some general indicators to consider when determining when to replace the head gasket:
1. Oil Seepage or Leaks: If you notice oil seeping or leaking around the head gasket area, it may be a sign that the head gasket needs replacement.
2. Mileage: Some Subaru owners consider replacing the head gasket around 100,000 miles, as part of preventative maintenance.
3. Other Maintenance Work: When the engine is already being worked on for other maintenance tasks, such as clutch replacement, it may be a good time to consider replacing the head gasket as well.
4. Diagnostic Evaluation: If a diagnostic evaluation indicates a blown head gasket, it’s crucial to address the issue promptly to prevent further damage to the engine.
It’s important to consult with a qualified mechanic or Subaru specialist to assess the specific condition of the vehicle and determine the appropriate timing for head gasket replacement.

How do I check my head gasket health?

To test a head gasket blown between the cylinder and another port, do a leak down test. This pumps air into the cylinder and measures how much is lost. You can listen and look for the source of where the air is exiting. To test the coolant system, do a coolant system pressure test.

How do you prevent a Subaru head gasket from failing?

Prevention and Maintenance Tips

1. Follow the Maintenance Schedule: Adhere to Subaru’s recommended maintenance schedule as outlined in your owner’s manual.
2. Coolant Flush and Refill: Consider regular coolant flushes and refills.
3. Quality Engine Oil: Use high-quality engine oil recommended for your Subaru model.

At what mileage should a head gasket be replaced?

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. Once you receive the diagnostics of a “blown head gasket,” you might think the automobile isn’t worth repairing.

What were the bad years for Subaru?

Subaru Outback Years to Avoid

• 1996 – 2008. Image Courtesy: Subaru. These Outbacks had an issue with the head gasket and engine overheating.
• 2010 – 2013. Outback from this period had issues with transmissions.
• 2015 – 2019. Unexpected acceleration issues, which are safety hazards, were reported by owners.

Why do Subaru head gaskets fail so often?

If a Subaru engine is run low on coolant or very hot, either of the two-cylinder heads can warp enough to let the slightest amount of gas leak past the gasket. Often a breach of the head gasket is a result of an overheating engine, not the initial cause.

Is it worth fixing head gasket?

Here’s a rule of thumb: Only replace the head gasket if the vehicle is worth at least double the cost of the repair. If it’s not, you’re likely better off getting a new (to you) car.

Why do Subarus have so many head gasket problems?

One contributing factor is the materials used in Subaru’s head gaskets. In some models, Subaru initially used multi-layer steel (MLS) head gaskets that were prone to failure due to their design and composition.

What Subaru model years have head gasket issues?

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.

How long do Subaru head gaskets last?

The head gaskets on your Subaru will typically last around 100,000 miles, depending on the year and model you own. You may also need your head gaskets replaced if you notice that your vehicle is running rough or your engine oil develops a milky color.

How do I know if my Subaru head gasket is bad?

5 Signs Your Head Gasket Is Blown: Capitol Subaru Auto Care…

1. Engine Overheating.
2. White Smoke From Tailpipe.
3. Low Coolant Level.
4. Rough Idle/Engine Knock.
5. Contaminated Engine Oil. We know that oil and water don’t mix, but if coolant gets into the oil in your engine, the resulting mixture loses its lubricating qualities.