Parts for your 2017 Subaru Outback

The Role and Maintenance of the Timing Belt on the 2017 Subaru Outback

When it comes to the 2017 Subaru Outback, a common question among drivers and enthusiasts is whether the vehicle uses a timing belt or something else. For this particular model, Subaru opted for a timing chain rather than a timing belt. This choice is significant given the vehicle's design and engine setup. Understanding the difference between these two components and why a timing chain was chosen helps explain the maintenance needs for the 2017 Outback.

Timing belts and timing chains both serve the crucial purpose of synchronising the movement of the engine's crankshaft and camshaft. This synchronization ensures that the engine's valves open and close at the right times during each cylinder's intake and exhaust strokes, allowing for smooth and efficient running. However, the key difference is in what the belt or chain is made from and how it operates over time.

The 2017 Subaru Outback is fitted with a timing chain, not a timing belt. Timing chains are made from metal, typically steel, and are built to endure the high-stress environment inside the engine much better than rubber timing belts. Because of this, timing chains tend to last significantly longer and usually do not require routine replacement as part of standard maintenance schedules. This longevity is one big reason Subaru prefers timing chains on their engines in many of their models, including the 2017 Outback.

So, why is a timing chain preferred over a timing belt in this case? The Outback's Boxer-style engine, known for its horizontally opposed cylinders, benefits from the strength and durability of a timing chain. Timing chains are less likely to snap or suffer sudden failure compared to belts, which can degrade with heat, oil exposure, and simply age over time. A failed timing chain or belt can lead to severe engine damage, but the timing chain's robustness reduces the likelihood of unexpected problems coming from this part.

Maintenance-wise, because the 2017 Subaru Outback uses a timing chain, there is no standard interval for replacement like you'd typically see with timing belts. Timing belts often need replacing between 90,000 to 150,000 kilometres (depending on the manufacturer's recommendations), while timing chains are designed to last the lifetime of the engine under normal operating conditions.

However, even though replacement is rarely necessary, it does not mean timing chains are completely maintenance-free. Proper engine oil changes and regular servicing are crucial because timing chains rely on good lubrication to function smoothly. Clean engine oil helps minimise wear and reduces the risk of the timing chain stretching or developing slack over time. Subaru recommends sticking to the scheduled oil change intervals detailed in your Outback's owner's manual to keep the timing chain and other engine components in optimal condition.

If a timing chain is left to run on dirty or degraded oil, it can cause chain wear, leading to issues such as rattling noises from the engine or poor engine performance. Sometimes, tensioners and guides that keep the chain tight and correctly positioned can wear out and might require inspection or replacement during engine servicing. You might notice a rattling or clicking noise coming from the engine bay on startup if there's an issue with the chain or tensioner. If this noise appears, getting it checked sooner rather than later by a trusted mechanic can save you from costly engine repairs down the track.

Most owners will probably never need to replace the timing chain itself during the typical lifespan of the vehicle. However, failing to keep up with regular oil changes and servicing can unintentionally shorten the timing chain's life or cause related parts to fail prematurely.

Ultimately, while the timing chain in the 2017 Subaru Outback is not as flashy or often discussed as other components like brakes or tyres, it plays a crucial role in keeping the engine running smoothly and reliably. Investing in regular servicing, using quality engine oil, and listening out for unusual noises will help ensure the timing chain does its job without fuss for many years.

So, when Subaru fans think about maintenance, timing chains can almost be ticked off the routine replacement list, but they still benefit massively from respect and regular care through good servicing habits. It's all about preventing problems before they start and keeping the engine's heartbeat strong on every adventure around Australia and beyond.