Parts for your 2017 Subaru Legacy-Coolant

2017 Subaru Legacy Coolant: What It Does and Why It Matters

The 2017 Subaru Legacy is a well-regarded midsize sedan known for its all-wheel drive capability and reliable performance. Like most modern vehicles, the Legacy relies on an effective cooling system to keep its engine running smoothly, and this means coolant plays a vital role. Contrary to any assumption that coolant might not be relevant, the 2017 Subaru Legacy does use coolant as an essential part of its engine management and maintenance routine.

Coolant, also known as antifreeze, is a specially formulated liquid designed to regulate engine temperature. When the engine runs, it generates a lot of heat due to combustion and friction. Coolant circulates through the engine block and radiator, absorbing this heat and preventing the engine from overheating. If the engine gets too hot, it can cause serious damage, ranging from warped components to complete engine failure, which can be costly to fix.

But coolant does more than just stop overheating. It also helps prevent the engine from freezing in cold conditions, which is especially important in places where temperatures drop below zero. The coolant's antifreeze properties stop the liquid inside the engine from freezing and expanding, which would otherwise crack parts of the engine. Given that Australia has some cooler regions, and Subaru's reputation for being rugged in different environments, this dual function is crucial for reliability.

The coolant used in the 2017 Subaru Legacy is typically a long-life, ethylene glycol-based antifreeze with corrosion inhibitors specifically formulated for Subaru engines. It's designed to protect the engine's metal surfaces, such as the radiator, water pump, and engine block, from rust and corrosion. Corrosion can degrade the cooling system, causing leaks, blockages, or system failures over time.

Maintaining the proper level and condition of coolant is a key part of regular vehicle servicing. Over time, coolant can become contaminated with dirt, rust, and other debris. Its chemical properties also degrade, reducing its ability to protect the engine effectively. This is why Subaru recommends periodic cooling system inspections and coolant replacement schedules in the vehicle's maintenance manual.

For the 2017 Subaru Legacy, checking and replacing the coolant should be done according to the service interval suggested by Subaru, which is generally every 60,000 to 100,000 kilometres or every 5 years, whichever comes first. Of course, this may depend on the specific driving conditions and climate the vehicle is regularly exposed to.

When topping up or changing the coolant, it's important to use the correct type to avoid damaging the Subaru's engine and cooling system components. Using the wrong coolant can lead to corrosion, chemical breakdowns, or incompatibility with the radiator hoses and seals. Generally, Subaru recommends their own brand of long-life coolant or an equivalent meeting the Subaru coolant specifications.

DIY enthusiasts can check the coolant level by looking at the coolant reservoir, which features minimum and maximum markings. The engine should be cold when inspecting to avoid burns and inaccurate readings due to coolant expansion. If the coolant level is low, topping up with the right antifreeze mixture is necessary, but persistent low levels may indicate a leak or other issue requiring professional attention.

Flushing the cooling system and replacing the coolant can also be a cost-effective way to prolong engine life and maintain peak performance. This process removes old, degraded coolant and any accumulated deposits, refreshing the system with clean, effective fluid. It also gives the mechanic a chance to inspect hoses, clamps, and the radiator for any signs of wear or damage.

Aside from protecting the engine, well-maintained coolant contributes to smoother heater operation in colder weather. Since the heater relies on engine heat transferred through the coolant, low or contaminated coolant can reduce cabin heating effectiveness. This small comfort detail is another reason keeping coolant in good shape is wise.

Overall, coolant is a must-have for the 2017 Subaru Legacy, just as it is for virtually every internal combustion engine vehicle on the market. It offers essential functions that safeguard the longevity and performance of the engine, prevent costly breakdowns, and help keep the driving experience comfortable and reliable. Regular checks and replacements of the coolant as part of routine maintenance is a simple step that pays dividends in the long run.