Parts for your 2016 Subaru Xv-Thermostat

Thermostat and Cooling System Maintenance on the 2016 Subaru XV

The 2016 Subaru XV, also known as the Crosstrek in some markets, is equipped with a conventional internal combustion engine that relies on a regulated cooling system to maintain optimal engine temperatures. This system includes a thermostat, an essential component designed specifically to manage the flow of coolant between the engine and radiator, ensuring the engine warms up quickly and operates efficiently.

Despite some modern vehicles experimenting with variable cooling technologies or electronically controlled thermostats, the 2016 Subaru XV uses a traditional mechanical thermostat. This means it has a wax-pellet thermostat valve that opens and closes based on the coolant temperature. So, the thermostat is indeed relevant and fitted to the 2016 Subaru XV, playing a crucial role in maintaining engine performance, fuel economy, and emissions.

At the heart of the 2016 Subaru XV's cooling system, the thermostat regulates the engine temperature by controlling coolant circulation. When the engine is first started and still cold, the thermostat remains closed, preventing coolant from flowing into the radiator. This closure allows the engine to reach its ideal operating temperature quickly, avoiding unnecessary fuel consumption and wear associated with running cold.

Once the coolant reaches a predetermined temperature, typically around 88-95 degrees Celsius, the wax inside the thermostat melts, causing the valve to open. This allows the coolant to circulate through the radiator, dissipate heat, and prevent the engine from overheating. When the engine cools down again, the thermostat closes, repeating the cycle.

This simple but vital mechanism brings several key benefits to the 2016 Subaru XV:

• Reduces engine wear by ensuring it warms up efficiently
• Improves fuel economy by optimising combustion at the correct engine temperature
• Maintains emissions at acceptable levels by preventing a rich cold-start mixture
• Prevents overheating that can cause major engine damage

Given its importance, the thermostat should never be overlooked during servicing.

When it comes to maintenance, the thermostat on the 2016 Subaru XV is generally a "fit and forget" type. It is a rugged mechanical device designed to operate reliably for many years. However, like all components exposed to heat, coolant chemistry, and constant mechanical movement, thermostats can and do fail over time. Common failure modes include sticking open or shut and internal corrosion or deposits that interfere with smooth operation.

A thermostat stuck open can cause the engine to run cold, leading to poor fuel economy and increased emissions, plus the heater may not blow warm air efficiently. Conversely, a thermostat stuck closed results in engine overheating, which can cause serious mechanical problems like blown head gaskets or warped heads.

For this reason, it is sensible to inspect the cooling system and thermostat periodically as part of routine maintenance, especially if the vehicle has high mileage or is used in harsh conditions. Subaru recommends following the vehicle's service schedule, which usually includes coolant replacement at specified intervals - commonly around every 100,000 kilometres. When replacing the coolant, it offers a good chance to inspect the thermostat and related components for any signs of wear or malfunction.

DIY enthusiasts or technicians checking the thermostat can perform diagnostic tests such as removing the thermostat and placing it in hot water to observe opening and closing behavior. Visual inspection for deposits or corrosion can also reveal early signs of trouble. However, because the thermostat is located inside the engine housing or thermostat housing, replacing it involves draining the cooling system and removing parts such as hoses and the housing, which makes it a moderately involved task.

If a replacement is needed, it's important to use a genuine Subaru thermostat or a high-quality aftermarket equivalent that matches the exact temperature rating specified in the service manual for the 2016 Subaru XV. Using the correct thermostat ensures the engine reaches and maintains the right temperature window, preserving performance and durability.

Thermostat servicing should also be paired with a full coolant flush and refilling with the recommended coolant type. Subaru XV models typically require specific coolant formulations to prevent corrosion and maximise the lifespan of cooling system components. Failure to maintain the correct coolant in good condition can shorten the life of both the thermostat and other cooling parts.

Regular checks of thermostat performance, whether through temperature monitoring during drives or a professional inspection during service visits, will help catch problems early. Symptoms such as engine overheating, fluctuating temperature gauge readings, heater malfunction, or unusually long warm-up times are all potential indicators that the thermostat might need attention.

In everyday usage, most owners won't need to think about the thermostat much beyond ensuring they stick to their vehicle's servicing program. Subaru's design for the XV balances reliability with simplicity, and the conventional thermostat is a trusted and proven feature within this system.

Overall, the thermostat in the 2016 Subaru XV is a small but vital part that keeps the engine running right. Proper maintenance, timely inspection, and replacement when necessary help keep the vehicle running smoothly and avoid costly repairs down the track. If any signs suggest the thermostat might be failing, addressing it sooner rather than later is the best way to keep one's XV trouble free and ready for any adventure.