Parts for your 2008 Subaru Exiga

The Role and Maintenance of the Timing Belt on the 2008 Subaru Exiga

The 2008 Subaru Exiga is an interesting vehicle, especially when it comes to its engine components. Unlike many cars of its era, the Exiga does not actually use a traditional timing belt. Instead, Subaru opted to equip this model with a timing chain. This decision significantly impacts the maintenance routine and longevity of the engine, so it's worth understanding why this is the case and what it means for the owner.

For those unfamiliar, timing belts and timing chains are both responsible for synchronising the rotation of the crankshaft and camshaft(s). This ensures the engine's valves open and close at the right times during each cylinder's intake and exhaust strokes. However, Subaru, particularly around the late 2000s for models like the Exiga, moved towards timing chains for several good reasons.

Firstly, timing chains are typically much more durable than timing belts. They are made of metal and run inside the engine oil, which keeps them lubricated and reduces wear. This durability often means timing chains can last the life of the engine, which is a major advantage over timing belts. Timing belts, by contrast, are made from rubber and require periodic replacement - usually somewhere between 60,000 to 100,000 kilometres depending on the model.

Subaru's decision to use a timing chain on the 2008 Exiga means owners do not have to worry about the timing belt replacement schedule that comes with many other vehicles. This can save time, money, and hassle during servicing. Since the chain is more robust, it significantly reduces the risk of catastrophic engine damage that could occur if a timing belt were to snap or slip.

Despite its strength, the timing chain is not maintenance-free. Over time, chains can stretch or wear out, though this usually happens at very high mileages beyond typical usage. The chain runs smoothly on guides and is kept taut by tensioners, which themselves can wear or fail. If ignored, these components can cause noise, reduced engine performance, or in worst cases, engine damage due to loss of proper valve timing.

When servicing a 2008 Subaru Exiga, mechanics will typically inspect the timing chain and its associated parts if the vehicle has clocked up a substantial number of kilometres or is making unusual noises from the timing cover area. Common signs that the timing chain or tensioner might need attention include rattling sounds during startup or engine idling, engine misfires, or a check engine light that points to timing-related problems.

Replacing the timing chain system is more involved than a timing belt replacement. It usually requires removing the timing cover, which is deeper inside the engine bay and often necessitates removing other components for access. Because of this complexity, timing chain replacement is less frequent and often addressed more proactively once symptoms appear rather than as part of routine maintenance.

Owners of the 2008 Subaru Exiga can take comfort in knowing they are driving a vehicle with fewer immediate timing belt concerns. Regular servicing and oil changes are essential to ensure the timing chain remains well lubricated and in good condition. Dirty oil or infrequent oil changes can contribute to premature wear of the chain and tensioning system.

Some quick pointers on what to look out for during servicing or when inspecting a Subaru Exiga's timing chain system:

• Listen closely for rattling or knocking noises especially during cold startup, as these can indicate a loose or worn chain.
• Pay attention to engine performance issues, like rough idling or intermittent misfires, which might be related to timing problems.
• Ensure oil is changed regularly using high-quality oil to keep the chain running smoothly and to protect the tensioners and guides.
• If the vehicle is approaching or has passed 200,000 kilometres, have the timing chain and components assessed by a qualified Subaru mechanic as part of a comprehensive check.

Overall, the timing chain in the 2008 Subaru Exiga is built to last and significantly reduces maintenance compared to a timing belt setup. While no component lasts forever, the chain offers peace of mind and fewer scheduled replacements, making the Exiga a lower-maintenance option in this respect.

So, if you own a 2008 Subaru Exiga or are considering getting one, there is no timing belt replacement schedule to worry about. Just ensure you keep up with your regular oil changes and servicing, and keep an ear out for any unusual engine sounds that might need early attention. This way, your timing chain will likely keep your engine running smoothly for many kilometres.