Parts for your 2017 Subaru Impreza

Understanding the Role of the Timing Belt on a 2017 Subaru Impreza

The 2017 Subaru Impreza is a popular car in Australia, known for its reliability, all-wheel drive capability, and efficient performance. When it comes to maintenance and servicing, one commonly discussed component in many vehicles is the timing belt. However, for the 2017 model of the Subaru Impreza, a timing belt is not relevant or used.

This is because the 2017 Subaru Impreza is equipped with a timing chain rather than a timing belt. The distinction between the two is important for maintenance purposes and understanding why the timing belt is not fitted to this vehicle. Timing belts are typically made of rubber and require regular replacement to avoid failure, while timing chains are metal and generally last much longer, often the entire lifespan of the engine.

The use of a timing chain in the 2017 Subaru Impreza comes down to design preference and the benefits it provides. Subaru's engines in this model year utilise a timing chain system because it offers better durability and reduced maintenance requirements, which is appealing to many drivers. Timing chains run inside the engine, lubricated by engine oil, which helps keep them functioning smoothly over a long period.

Since the timing chain is internal and designed for long-term use, it differs significantly from a timing belt in terms of maintenance. The timing chain in the 2017 Subaru Impreza does not require routine replacement like a timing belt would. Instead, it is built to last and only needs inspection or replacement if there's exceptional wear or failure, which is quite rare under normal driving conditions.

Understanding the timing chain's purpose helps clarify why the 2017 Subaru Impreza does not use a timing belt. The chain synchronises the rotation of the crankshaft and camshaft, ensuring the engine's valves open and close at the correct times during each cylinder's intake and exhaust strokes. This precise timing is crucial for the engine to run smoothly, efficiently, and to prevent piston-to-valve collisions, which could cause severe damage.

Because timing chains are housed inside the engine and lubricated continuously, their service requirements differ from timing belts. Regular oil changes and routine engine maintenance are virtually all that is required to keep the timing chain in good condition in a 2017 Subaru Impreza. Avoiding neglect with oil changes can prevent chain stretch or premature wear, as the chain depends heavily on clean and sufficient lubrication.

Here are some tips for maintaining the timing chain and knowing when to expect issues:

• Stick to the manufacturer's recommended oil change intervals using the correct grade oil. Dirty or low oil levels can accelerate wear.
• Listen for unusual noises from the engine, such as rattling sounds on startup, which might indicate chain tensioner problems or chain wear.
• Keep an eye on engine warning lights and performance. Timing chain issues can sometimes cause poor running or misfires.
• Have a professional mechanic inspect the engine if there are any concerns, especially if the car has high kilometres.

Replacement of the timing chain on a 2017 Subaru Impreza is not part of regular servicing and would only be necessary in the case of failure, which is uncommon. The replacement process is more involved than a timing belt change, requiring substantial labour because the chain is inside the engine. This typically makes timing chain repairs more expensive and time-consuming, but again, these issues rarely arise if routine engine maintenance is upheld.

In day-to-day ownership, drivers can expect the timing chain in their Impreza to quietly do its job without requiring much attention. This is one of the benefits of Subaru's design choice to use a timing chain over a timing belt. It contributes to the overall reliability and low ongoing maintenance costs of the vehicle, which is why many Impreza owners enjoy hassle-free motoring for many years or kilometres.

Ultimately, understanding that the 2017 Subaru Impreza uses a timing chain instead of a timing belt helps owners avoid unnecessary maintenance or replacement expenses. Australians driving this model can focus on standard maintenance items such as oil changes, spark plugs, brake pads, and filters, confident that the timing chain is a robust component designed for longevity.

So if an owner ever comes across references to timing belts in discussions or manuals applicable to other vehicles, they can rest easy knowing that their 2017 Subaru Impreza's timing chain doesn't require a replacement interval like a timing belt would. Proper oil care and listening for unusual engine noises remain the best way to keep the timing chain in check and the engine running strong.