Parts for your 2018 Subaru Outback

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

The 2018 Subaru Outback is a popular choice among Australian drivers for its rugged capability and comfortable ride. When it comes to servicing this vehicle, understanding what parts it uses and why is key to keeping it running smoothly. One component that often comes up in vehicle maintenance discussions is the timing belt. However, for the 2018 Subaru Outback, the timing belt is not part of the engine's design. Instead, Subaru utilises a timing chain, and this has important implications for maintenance and servicing.

So, why does the 2018 Subaru Outback not have a timing belt? The answer lies in the engine technology Subaru employs. The 2018 Outback typically comes with either a 2.5-litre flat-four or a turbocharged 3.6-litre flat-six engine. Both engines use timing chains rather than traditional timing belts. Timing chains are metal chains that link the crankshaft to the camshaft, ensuring precise engine timing.

There are a few reasons why Subaru opts for timing chains over timing belts. First, timing chains are built to last much longer than timing belts. While timing belts are made from reinforced rubber and require replacement at set intervals (usually every 90,000 to 150,000 kilometres depending on the vehicle), timing chains are designed to withstand the life of the engine under normal conditions. This reduces the need for costly and sometimes complex replacement jobs.

Second, timing chains are more durable in harsher conditions. Since Subaru Outbacks are often taken off-road or through Australian terrain that demands reliability, the timing chain's robustness is beneficial. The chain is less susceptible to wear and damage from heat, oil, and contaminants compared to rubber belts. This choice contributes to the Outback's reputation for dependability.

However, this does not mean the timing chain is completely maintenance-free. While it is much more durable, the timing chain can suffer from stretching, wear, or issues with the tensioners and guides that ensure the chain operates correctly. In the 2018 Subaru Outback, a rattling noise from the engine, engine misfires, rough running, or even a "check engine" light could indicate timing chain issues.

Servicing the timing chain on a 2018 Subaru Outback usually involves inspections rather than routine replacements unless there is a problem. When the car comes in for regular servicing, mechanics will typically check the engine for any unusual noises or warning signs that suggest timing chain wear. Since the chain is inside the engine and lubricated by engine oil, regular oil changes with the right quality oil are crucial for its longevity.

Here are some tips on timing chain care for your 2018 Subaru Outback:

• Stick to the manufacturer's oil change schedule. Clean, high-quality oil helps reduce wear on the timing chain and associated parts.
• Listen for unusual engine noises, especially at startup or during acceleration, which could indicate timing chain tensioner problems or chain wear.
• Address engine warning lights promptly by having your vehicle scanned to rule out timing chain or other engine issues.
• Ensure servicing is done by qualified technicians who understand the specifics of Subaru's boxer engines and the timing chain system.

Repair or replacement of the timing chain or its components is quite involved and typically only needed if there is a fault or excessive wear. If the timing chain breaks or slips, it can cause serious engine damage, so catching issues early is vital. Fortunately, with normal use and proper servicing, the timing chain on a 2018 Subaru Outback should last well beyond 200,000 kilometres.

In a nutshell, even though the 2018 Subaru Outback does not use a timing belt, recognising the importance of the timing chain helps owners appreciate the engineering behind Subaru's reliable engines. Regular oil changes, paying attention to engine sounds, and keeping up with scheduled servicing ensure the timing chain does its job quietly and efficiently. This setup is one of the reasons the Outback offers a trouble-free driving experience whether cruising the highway or venturing off the beaten track.