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A Beginner's Guide to Timing Belt and Timing Chain Maintenance

Your vehicle’s timing system ensures the crankshaft and camshaft rotate in sync, allowing your engine’s valves to open and close at the right intervals. In the Subaru Forester, this is managed by either a timing belt or a timing chain, depending on the engine. Keeping these components in top shape prevents engine misfires, power loss, and catastrophic internal damage.

What's the Difference Between a Timing Belt and a Timing Chain?

A timing belt is made of reinforced rubber and typically needs replacement between 60,000–100,000 miles. A timing chain is metal and designed to last longer—often the life of the engine—but still requires maintenance. While belts are quieter and lighter, chains are more durable and resistant to stretching.

Expert Maintenance Tips for Your Timing Belt or Chain

1. Follow Your Owner’s Manual

Service intervals vary—stick to Subaru’s recommendations for your Forester's engine type.

2. Replace Related Components

Swap out tensioners, pulleys, and water pumps when changing the belt or chain.

3. Listen for Rattling or Squealing

Unusual noises can signal loose or failing timing components.

4. Use Only OEM Parts

Factory timing components offer the precise fit needed for long-term performance.

Are Aftermarket Timing Components Worth It?

Aftermarket kits may be cheaper, but quality varies widely. Poor tolerances and subpar materials can lead to early failure. OEM parts ensure reliability—especially when paired with essential replacements like spark plugs during major service.