Parts for your 2017 Subaru Forester-Thermostat

Thermostat in the 2017 Subaru Forester: What You Need to Know

The 2017 Subaru Forester is a popular SUV known for its reliability and solid performance, but when it comes to the cooling system, one question that often comes up is whether the vehicle uses a thermostat or not. After checking multiple technical sources and factory repair manuals, it's clear that the 2017 Forester is definitely fitted with a thermostat. This is no surprise as most internal combustion engine vehicles, including Subarus, rely on thermostats to regulate engine temperature efficiently.

So what exactly is this little but important part doing under the bonnet? A thermostat is essentially a temperature-controlled valve located between the engine and the radiator. It controls the flow of coolant to maintain the engine at its ideal operating temperature. When the engine is cold, the thermostat stays closed to allow the engine to warm up quickly. Once the engine reaches a predetermined temperature, usually around 88-93 degrees Celsius for the Forester, the thermostat opens. This lets coolant flow to the radiator where heat is dissipated to prevent overheating.

The thermostat's role is crucial because keeping the engine at the right temperature not only improves fuel efficiency but also reduces emissions and prevents premature engine wear. Without a thermostat, the engine would take longer to warm up in cooler weather, or conversely, could overheat without proper regulation.

When it comes to servicing the 2017 Subaru Forester, checking the thermostat is a step that shouldn't be overlooked. Although thermostats are built to last, they can sometimes get stuck either open or closed. A stuck open thermostat means the engine might run cooler than intended, leading to reduced fuel efficiency and increased emissions. On the other hand, a stuck closed thermostat can cause the engine to overheat, which risks serious damage such as a blown head gasket or warped cylinder head.

Maintenance tips for the thermostat on a 2017 Forester include:

• Regularly checking coolant levels and condition. Old or contaminated coolant can cause the thermostat to malfunction, so it's important to flush and replace the coolant according to the manufacturer's schedule, usually every 60,000 kilometres or five years.
• Watch for engine temperature warning signs, such as fluctuating temperature gauge readings, poor heater performance, or a noticeable lack of heat inside the cabin, particularly in cooler months.
• If overheating occurs without obvious signs of coolant loss, the thermostat is a common culprit and should be inspected or replaced to prevent further engine damage.

Replacing the thermostat on the 2017 Subaru Forester is generally straightforward. It is housed in a small metal or plastic cover attached to the engine block where the upper radiator hose connects. This location makes it accessible for most mechanics or handy DIYers with some automotive know-how. When changing the thermostat, it's best practice to replace the thermostat gasket or O-ring as well to ensure a good seal. Always use a genuine or high-quality aftermarket thermostat designed to meet Subaru's specifications, as the correct opening temperature and quality materials are key to proper engine performance.

Even if the vehicle isn't showing any signs of thermostat failure, proactively replacing the thermostat during major cooling system service can be a wise move to avoid unexpected breakdowns. Given that the thermostat plays a vital role in regulating engine temperature, its failure can lead to costly repairs down the track.

To recap, the 2017 Subaru Forester does have a thermostat fitted as part of its cooling system. This crucial component regulates engine temperature by controlling coolant flow between the engine and radiator. Regular maintenance, including coolant changes and watching out for signs of thermostat sticking, will help keep the Forester running smoothly and efficiently. Should a thermostat issue arise, timely replacement and use of quality parts are key to preserving the engine's health and performance on the road.