Parts for your 2018 Subaru Exiga

The Role and Maintenance of the Timing Belt on the 2018 Subaru Exiga

The 2018 Subaru Exiga is a versatile multi-purpose vehicle well-regarded for its spacious interior and reliable performance. When it comes to the heart of the car, the engine, one of the key components that keep everything running smoothly is the timing system. For this model, understanding whether a timing belt or chain is used and how to maintain it is crucial for ensuring the longevity and reliability of the vehicle.

Now, when talking about timing belts and timing chains, many people get a bit confused. These components are essential because they synchronise the rotation of the crankshaft and camshaft(s) so the engine's valves open and close at the correct times during each cylinder's intake and exhaust strokes. This is crucial for the engine's optimal function and longevity.

For the 2018 Subaru Exiga, it is important to note that this vehicle is fitted with a timing chain rather than a timing belt. This detail is quite significant. Subaru has traditionally used timing chains in many of their engines, including the boxer engines found in the Exiga. Unlike timing belts, timing chains are metal and are generally more durable.

So why is a timing chain used on the 2018 Subaru Exiga instead of a timing belt? The main reason lies in durability and maintenance. Timing chains are built to last longer and typically do not require replacement as frequently as timing belts, or even at all during the lifespan of the vehicle. While timing belts are made of rubber and need scheduled replacements every 60,000 to 100,000 kilometres depending on the vehicle, timing chains are metal-linked and have a much longer service life.

Timing belts, although quieter and cheaper to manufacture, are prone to wear, cracking, and eventual failure over time, especially if not replaced in line with the manufacturer's recommended schedule. If a timing belt fails, it can cause serious engine damage. As a result, many manufacturers, including Subaru for this model, opt for timing chains which typically run inside the engine and are lubricated by engine oil, significantly extending their operational life with less risk of sudden failure.

Now let's chat about what this means for maintaining the timing system on the 2018 Subaru Exiga. Since the vehicle uses a timing chain, this does come with its own maintenance considerations, but these are often less frequent and less intensive compared to those for timing belts.

First off, while the timing chain itself does not usually require replacement during the typical lifespan of the vehicle, it is still a moving component subjected to wear and tension over time. The chain relies heavily on proper engine oil quality and regular oil changes. Dirty or degraded engine oil can cause increased wear on the timing chain and its associated tensioners and guides.

Subaru recommends adhering strictly to the oil change intervals and using the correct oil grade to keep the engine components well lubricated. For most Subaru boxer engines, this means regular oil changes approximately every 10,000 to 12,000 kilometres or every 12 months, whichever comes first. Using premium or manufacturer-approved synthetic oils helps protect the timing chain and reduces the risk of premature wear.

In addition to oil quality, some components associated with the timing chain may require attention. This includes the chain tensioner and guides. The tensioner maintains the appropriate level of tension on the timing chain, preventing it from becoming loose and slipping. Over time, tensioners can weaken or fail, and guide rails can wear down, which can cause noise or affect engine timing accuracy.

Common signs that the timing chain or its components may need inspection or maintenance include unusual rattling or ticking noises from the engine, especially during cold starts. If these noises appear, it is a good idea to get the vehicle checked by a qualified Subaru mechanic. Early inspection can prevent more serious engine issues down the track.

On the 2018 Subaru Exiga, the timing chain system is designed to be robust and maintenance-friendly. While you will not find specific timing chain replacement recommendations in the standard service schedule like you would with timing belts, keeping an eye (or ear) out for potential symptoms and sticking to a proper maintenance routine will ensure the system performs its job reliably.

Another tip for Subaru owners is to avoid extended periods between oil changes or using cheap, low-quality oils. Since the timing chain is immersed in engine oil, its health is directly tied to oil condition. Neglecting this can lead to accelerated wear of the chain and its components.

Lastly, when servicing the 2018 Subaru Exiga, always have the mechanic inspect the engine for any signs of timing chain-related wear, especially if the car is approaching high mileage territory. Although the timing chain is not part of routine replacement, understanding its condition is important for long-term reliability and avoiding costly repairs.

So, while the 2018 Subaru Exiga does not use a timing belt, the role of its timing chain is just as vital. It keeps the engine running true and smooth. Just treat your engine oil right, listen for any unusual noises, and ensure regular servicing at authorised Subaru dealerships or trusted mechanics. This approach will keep the timing chain in great shape and your Exiga running happily for many thousands of kilometres ahead.