Parts for your 2013 Subaru Impreza

Understanding the Timing Belt on the 2013 Subaru Impreza

When it comes to the 2013 Subaru Impreza, one common question focuses on whether this vehicle uses a timing belt or a timing chain. Referencing technical sources and official Subaru service manuals, it is clear that the 2013 Subaru Impreza does not use a timing belt. Instead, it is fitted with a timing chain.

The reason for not using a timing belt in the 2013 Subaru Impreza aligns with Subaru's engineering choices for this generation of vehicles. Timing chains are known for their durability and longevity compared to timing belts, which often require regular replacement. A timing chain is metal and designed to last the lifetime of the vehicle, or at least far longer than a timing belt, which is usually made from rubber and fabric materials and subject to wear and tear.

For the 2013 Subaru Impreza, particularly in models with the 2.0-litre boxer engine (such as the FB20), Subaru opted for timing chains to manage the timing of the engine valves. This decision means owners don't have to schedule costly timing belt replacements, which are common maintenance items in many other cars. Instead, the timing chain in the Impreza is designed to work efficiently and reliably over many thousands of kilometres without needing routine replacement.

But don't be fooled into thinking there is no maintenance required. While timing chains are more robust, they still need to be checked as part of your regular service routine because they can stretch over time, or the tensioner and guides that keep the chain tight and in place can wear out. Any issues with the timing chain system can lead to performance problems or even catastrophic engine damage in extreme cases.

When servicing a 2013 Subaru Impreza, the timing chain is typically inspected visually and audibly for signs of wear, noisy operation, or looseness. Most people will not hear the timing chain unless it's starting to stretch or the tensioner is failing. If you do hear a rattling noise from the front of the engine at startup, this could be a sign that the timing chain tensioner or the guides need attention.

Routine oil changes are particularly important for a timing chain's longevity because the chain relies on engine oil for lubrication. Cleaner oil means less wear on the metal chain and its associated components. This is why following the manufacturer's oil change intervals and using the recommended oil is crucial for keeping the timing chain in good shape.

The timing chain system on the 2013 Impreza also includes components like the chain guides, tensioner, and sprockets. If the chain does stretch beyond acceptable limits, or the tensioner or guides fail, it is essential to replace these parts promptly. If ignored, the consequences could be severe, affecting engine timing and leading to misfires, rough running or engine damage.

Replacement of the timing chain system is not a regular service item but rather a repair item that becomes necessary if issues are detected. Generally, timing chains have a much longer service life than belts, often not requiring replacement until well past 200,000 kilometres or more. That said, the inspection itself is a standard part of major service checks on the Impreza to catch any early signs of wear.

For those doing regular servicing or inspections, it is a good idea to listen for any unusual rattling noises from the front of the engine during startup or idling. This early sign can prompt a mechanic to inspect the timing chain tensioner and guides, potentially saving a lot of money and hassle down the track.

In summary, the 2013 Subaru Impreza does not use a timing belt, making it a bit easier in terms of planning maintenance schedules. Instead, it uses a timing chain, which requires less frequent intervention but still benefits from good maintenance habits such as timely oil changes and attentive listening during services. Keeping on top of these factors can ensure the Impreza's engine timing system runs smoothly for many years.