What causes Subaru head gasket issues?
Subaru vehicles are known for their reliable performance and all-wheel-drive capabilities, but they are also susceptible to a common issue: head gasket failure. Head gasket problems can be a significant and costly repair, and it's important for Subaru owners to understand the causes and potential solutions.
Causes of Subaru Head Gasket Failure
Subaru head gasket issues are often attributed to a few key factors:
- Boxer Engine Design: Subaru's signature boxer engine configuration, with its horizontally opposed cylinders, can put additional stress on the head gaskets, making them more prone to failure over time.
- Coolant Leaks: Coolant leaks, either from the radiator or other cooling system components, can cause the head gaskets to deteriorate prematurely. This is exacerbated by the boxer engine design, which can make it more difficult to detect and address coolant leaks.li>
- High Mileage: As Subaru vehicles accumulate miles, the head gaskets become more susceptible to wear and tear, increasing the likelihood of failure. This is especially true for older models or those that have been driven extensively.li>
- Overheating: If a Subaru engine overheats, it can cause the head gaskets to fail, leading to coolant leaks and other serious issues. This can be caused by a variety of factors, including cooling system problems, excessive towing, or driving in extreme conditions.
It's important to note that while head gasket issues are relatively common in Subaru vehicles, they can be addressed through proper maintenance and timely repairs.
Preventing and Addressing Subaru Head Gasket Problems
To help prevent and address Subaru head gasket issues, consider the following steps:
- Regular Maintenance: Ensure that your Subaru's cooling system is well-maintained, including regular coolant flushes and inspections of hoses, belts, and other components. This can help identify and address any potential issues before they lead to head gasket failure.li>
- Monitoring for Leaks: Regularly check for any signs of coolant leaks, such as puddles under the vehicle or discoloration on the engine. Address any leaks promptly to prevent further damage to the head gaskets.
- Addressing Overheating: If your Subaru begins to overheat, stop driving immediately and have the issue diagnosed and repaired by a qualified mechanic. Continuing to drive an overheating vehicle can exacerbate head gasket problems.li>
- Considering Preventative Measures: Some Subaru owners opt for preventative measures, such as installing a head gasket sealant or upgrading to a more durable head gasket material, to help extend the life of their vehicle's head gaskets.
By being proactive and addressing Subaru head gasket issues early, you can help extend the life of your vehicle and avoid costly repairs down the line.
How long do head gaskets last on subarus?
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.
Why do Subaru head gaskets go bad?
Overheating: One of the most common causes of head gasket failure is overheating. This can occur due to a variety of reasons, including coolant leaks, a malfunctioning thermostat, or a failing water pump. High temperatures can warp the cylinder head or engine block, compromising the gasket's seal.
Why do boxer engines have head gasket problems?
The Subaru boxer engine have been known to have head gasket problem for many years. It is from two reasons. The first is the open deck engine block, meaning it doesn't have a lot structual integrity to stabalizer the cylinder bore. The second problem is the head gasket material and the head bolts.
Are head gaskets covered under Subaru warranty?
When you first purchase your Subaru it comes with a factory backed warranty. A 3 year/36,000 mile bumper to bumper and a 5 year 60,000 mile powertrain warranty is standard. If you have head gasket failure within that time you are one of the lucky ones. Once that warranty expires you're on your own.
How much does it cost to fix a Subaru head gasket?
The cost of replacing a head gasket on a Subaru starts around $3,000.
What is the most common cause of a blown head gasket?
Head gasket failures are usually the result of engine overheating, so ensure coolant is topped up and the coolant system is in good working condition, with no leaks and an efficient radiator. A properly-installed head gasket will also prevent future damage.
At what mileage do head gaskets go bad?
200,000 miles
A head gasket creates a seal between the engine block and head. A head gasket can last as much as 200,000 miles.
What year did Subarus have bad head gaskets?
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.
