When should the timing chain be replaced on a Subaru Forester?
The timing chain is a critical component of your Subaru Forester's engine, ensuring that the camshaft and crankshaft are synchronized for optimal performance. Unlike timing belts, timing chains are designed to last longer, but they are not immune to wear and tear. In this article, we’ll explore when you should consider replacing the timing chain on your Subaru Forester and the signs to watch for that indicate it may be time for a replacement.
What Is a Timing Chain and Why Is It Important?
The timing chain is a metal chain that connects the engine's crankshaft to the camshaft, ensuring that the engine's valves open and close at the right times during each cylinder's intake and exhaust strokes. This synchronization is essential for the engine to run smoothly and efficiently. A failing timing chain can lead to severe engine damage, so understanding its maintenance needs is crucial.
When Should You Replace the Timing Chain?
Unlike timing belts, which typically require replacement every 60,000 to 100,000 miles, timing chains are designed to last much longer. In most Subaru Foresters, the timing chain is intended to last the lifetime of the engine. However, there are exceptions, and replacement may be necessary under certain circumstances:
- High Mileage: While timing chains are durable, they can wear out over time, especially in vehicles with over 200,000 miles.
- Signs of Wear or Damage: If you notice symptoms such as rattling noises from the engine, poor engine performance, or the check engine light illuminating, it could indicate timing chain issues.
- Lack of Maintenance: Neglecting regular oil changes can accelerate timing chain wear, as the chain relies on proper lubrication to function effectively.
Signs Your Timing Chain May Need Replacement
It’s essential to recognize the warning signs of a failing timing chain to prevent costly engine damage. Here are some common indicators:
- Rattling Noise: A loose or worn timing chain can produce a rattling sound, especially during startup or idling.
- Engine Misfires: A stretched timing chain can cause the engine's timing to be off, leading to misfires.
- Check Engine Light: A malfunctioning timing chain can trigger the check engine light, often accompanied by diagnostic trouble codes related to timing.
- Reduced Engine Performance: If the timing chain is not functioning correctly, you may notice a drop in power, fuel efficiency, or overall engine performance.
How to Extend the Life of Your Timing Chain
Proper maintenance can help extend the life of your Subaru Forester's timing chain. Here are some tips:
- Regular Oil Changes: Use high-quality oil and change it at the recommended intervals to ensure the timing chain is well-lubricated.
- Listen for Unusual Noises: Pay attention to any unusual sounds coming from the engine and address them promptly.
- Follow Manufacturer Guidelines: Adhere to Subaru's maintenance schedule and recommendations for your specific model and year.
Conclusion
While the timing chain in your Subaru Forester is built to last, it’s not invincible. Regular maintenance and attention to warning signs can help you avoid costly repairs and keep your vehicle running smoothly. If you suspect an issue with your timing chain, don’t hesitate to consult a trusted mechanic. At Kevin’s Autos, we specialize in diagnosing and repairing timing chain issues to ensure your Subaru Forester stays in top condition. Contact us today to schedule an inspection!
Frequently Asked Questions
What year did Subaru change to timing chains?
2011
2011 was the first year for the newest version of the 2.5L normally aspirated engine. Years previous to 2011 the 2.5L, as did all Subaru flat four engines, used a timing belt. Beginning in 2011 the 2.5L uses a timing chain.
How long does a timing chain last in a Subaru Forester?
A timing belt is rubber-based, and will need to be replaced at certain maintenance intervals. A timing chain is bulkier and louder; however, it does not require replacement. Though a repair might be necessary in some rare occasions, most timing chains last for the entire life of the engine.
How do I know if my timing chain is worn?
If it does it's best to replace. It the third symptom is poor. Performance a stretched timing belt or chain could eventually lead to skipping a tooth on one of the sprockets.
Does a Subaru Forester have a timing chain or belt?
Newer models use timing belts made of polyurethane and Kevlar for long life and durability.
Do Subaru timing chains need to be replaced?
They may only need to get new timing chains after driving for a full one hundred and twenty thousand miles. It should take years for most drivers to get to that point. Customers who recently purchased used Subaru vehicles should usually get the automotive timing chains checked.
How do I know if my timing chain needs replacing?
If it does it's best to replace. It the third symptom is poor. Performance a stretched timing belt or chain could eventually lead to skipping a tooth on one of the sprockets.
Can a timing chain last 200 000 miles?
Timing chains can last anywhere between 150,000 and 200,000 miles before they require repair or sustain damage. But once they do, they must be replaced without fail as they can break off entirely, therefore causing the engine to fail.
Which Subaru Forester has a timing chain?
Simply, then, a 1997 to 2011 Forester will have a timing belt, while any of the fourth-gen Foresters (from 2013 or later) will have a timing chain. And for a brief period from 2011 to 2012, the Forester was fitted with either a timing belt or a timing chain depending on which engine was fitted.
How do I know when my timing chain needs replacing?
These signs include:
- Rattling Sound on Starting The Engine or Idling. A common finding in a vehicle with a bad timing chain is unusual rattling noise when the engine is started or when brakes are engaged.
- Misfiring Engine.
- Contaminated Engine Oil.
- Check Engine Light.
- Inability to Start The Engine.
At what mileage should a timing chain be replaced?
Timing chains are designed to last a long time, typically between 100000 to 200000 miles (or about 160000 to 320000 kilometers). Unlike timing belts, which require regular replacement, timing chains generally do not have a specific replacement interval.
