Parts for your 2011 Subaru Legacy-Thermostat

The 2011 Subaru Legacy Thermostat: What It Does and Why It Matters

The 2011 Subaru Legacy does indeed have a thermostat fitted as part of its cooling system. Far from being an outdated or redundant component, the thermostat plays a crucial role in maintaining the optimal operating temperature of the engine. Understanding what the thermostat does and how it fits into the overall cooling system helps owners keep their Legacy running smoothly, especially when it comes to servicing and maintenance.

Simply put, the thermostat is a temperature-controlled valve located between the engine and the radiator. Its job is pretty straightforward yet essential: it regulates the flow of coolant through the engine to ensure the engine warms up quickly and then stays at the right temperature.

Here's why it's important for a 2011 Subaru Legacy. When you first start the engine, it's cold and needs to warm up quickly for efficient operation. The thermostat stays closed at this stage, preventing coolant from flowing to the radiator. This allows the engine to reach its ideal temperature faster by circulating the coolant only within the engine block. Once the engine reaches its designed operating temperature - usually around 88 degrees Celsius for a Subaru - the thermostat valve opens, allowing coolant to flow through to the radiator. This process helps keep the engine from overheating by dissipating excess heat.

The thermostat's ability to open and close at the right times is a big deal because it ensures fuel efficiency, lower emissions, and engine longevity. A car running too cold will perform inefficiently, struggle with emissions, and even cause premature engine wear. Conversely, if the engine gets too hot, there's a risk of overheating and severe damage.

For the Subaru Legacy owner, knowing about the thermostat is part of good vehicle care. While the thermostat doesn't need constant attention, it is a component that can fail over time due to wear, corrosion, or contamination. A faulty thermostat might get stuck closed or open, causing a number of problems.

If stuck closed, coolant won't circulate properly and the engine will overheat quickly. On the other hand, if the thermostat is stuck open, the engine will run too cool, leading to poor heater output, decreased fuel economy, and increased engine wear. So, despite being a small part, the thermostat has big responsibilities.

Regular inspection of the cooling system during scheduled servicing of the 2011 Subaru Legacy is recommended. Mechanics will often check the thermostat's functionality alongside the radiator, hoses, and water pump. This helps catch issues before they snowball into expensive repairs. It is especially important to have the thermostat checked if the car is overheating or the temperature gauge behaves erratically.

Replacing the thermostat is generally a straightforward job, but it requires some care. The old thermostat sits inside a housing connected to the engine. The cooling system has to be drained to avoid coolant spills and the risk of airlocks. Upon replacement, new gaskets or seals must be carefully installed to prevent leaks. The cooling system then needs to be refilled and properly bled to remove trapped air. It's a good idea for Subaru Legacy owners to have this work done by a qualified technician or follow specific service manuals if attempting DIY maintenance.

While thermostats are designed to last a long time, Subaru recommends checking the cooling system and thermostat function every 60,000 to 100,000 kilometres or during major services. Some signs that a thermostat might be on its way out include:

• Engine overheating or running hotter than usual
• Temperature gauge fluctuating erratically
• Heater not blowing hot air, especially in winter
• Coolant leaks near the thermostat housing
• Unexplained coolant loss without obvious leaks

Addressing thermostat issues promptly keeps the 2011 Subaru Legacy running at its best. It prevents engine damage and helps maintain fuel efficiency and comfort for the driver and passengers, especially when dealing with the varied Australian climate.

In a nutshell, the thermostat is a vital but often overlooked part of the Subaru Legacy's engine system. It quietly regulates engine temperature, ensuring optimal performance and longevity. Proper maintenance and timely replacement of the thermostat as needed will ensure the Legacy remains reliable for years to come.