When Do I Need to Replace My Timing Belt?

Modern engines are a mechanical marvel, with hundreds of individual parts all working together in the name of producing power through combustion. With so many different sensitive moving components, ensuring each step in the combustion process occurs at precise moments is essential to maintaining a smooth operation. 

This orchestration of various components is the responsibility of the timing system, which keeps each step of the combustion process (intake, compression, combustion, and exhaust) in perfect timing to prevent internal interference. Even the smallest missteps in timing can cause irreparable engine damage from colliding valves, early combustion, or other serious complications. 

In this article, we’ll cover what the timing system and timing belt are, how they work, and how often you should expect to service yours. 

What is a Timing Belt?

The timing belt is the heart of your engine’s timing system, using rubber teeth that run the length of the belt to connect with the engine’s camshaft and crankshaft to ensure each step occurs at the optimal time. 

As the belt turns, it keeps these shafts synchronized with each other, extending and retracting valves and pistons as needed. Without proper timing, these shafts can fall out of synchronization and cause the steps of combustion to overlap, interfering with each other and causing internal failures of the engine. 

Why Do Timing Belts Need to Be Replaced?

While timing belts are made to be durable, their rubber material can begin to stretch, degrade, or even tear with old age. Extreme temperatures in especially hot or cold areas can also contribute to the wear of your timing belt.

If you notice any visible cracks or stretching in your belt, you should take your vehicle to a trusted mechanic for inspection as soon as possible.

Symptoms of Failing Timing Belt

Although a failing timing belt will eventually cause severe damage if left untreated, there are a few common symptoms of timing problems that could warn you of the problem before it gets out of hand.

• Engine misfires
• Repeated ticking noises
• Smoke from exhaust
• Unusual RPM fluctuations
• Squealing noise
• Lost performance and fuel economy

When a timing belt fails completely, it can cause your engine to come to a screeching halt. In interference engines (where the valves extend into the piston’s path of travel), a timing failure can send the valves colliding into either each other or the piston itself, bending the sensitive valves and causing irreparable damage to your engine. Although the potential for damage is lessened in the non-interference engine, timing issues can still cause harm to the motor’s internals.

How Often Should I Replace My Timing Belt?

So now that you know the importance of timing belt replacements, you may be wondering how often this service needs to be completed to keep your engine in proper timing.

Modern timing systems generally need belt replacements less frequently than older vehicles. In general, you can expect to replace your vehicle’s timing belt around every 60,000-100,000 miles. The exact interval will vary based on the make and model of the vehicle, but it’s a good idea to start keeping your eye on the belt around this mileage. 

Timing Services at Scott’s U-Save

If you’re experiencing symptoms of a mistimed engine, or believe yours is close to needing a replacement, trust the experts at Scott’s U-Save in Steger, New Lenox, Schererville, and Crown Point to provide your vehicle with top-notch inspection, maintenance, and repairs! Give us a call or schedule online today to secure a spot with our friendly and knowledgeable team.