Timing Chain vs. Timing Belt: What’s The Difference?

Your vehicle’s engine contains thousands of components that keep everything running perfectly synchronized with precision. The perfect timing of your engine is due to your timing chain/belt. Ensuring your valves and cylinders are perfectly synced up every time you go to start your car. Without proper timing, your engine won’t survive for long. Valves crash into each other, and the exhaust pistons can extend at the wrong time, leading to engine failure.  Now that we’ve established the similarities between the two and how important they are for the operation of your vehicle, it’s time to look at what sets these two parts apart.

What’s The Difference?

Despite carrying out the same duties, belts and chains are made of completely different materials.

Timing belts are made of a thick rubber material, allowing for quiet operation and cheap production. Timing chains, on the other hand, are, well, chains. They’re made of durable metal and are usually more expensive to produce. Material isn’t the only difference, though. Timing belts are located on the outside of the engine, exposed to the air and debris around them. This can cause them to dry out, stretch, or crack, and cause issues down the line. Timing chains are instead located on the inside of the engine and are constantly lubricated by the engine’s oil. ​

Which is Better?

While it may seem like timing chains are flat-out the superior option, they do come with downsides. Timing chains are usually considered much noisier than their rubber counterparts, which can make them unappealing for manufacturers looking to make a dead-silent and luxurious car. Belts are made of a soft material, which means that they’re usually the quieter of the two options.

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However, many manufacturers are focusing on timing chains for their modern vehicles, as advances in quieter chains and cheaper production have made them the clear choice for many models.

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Timing chains are also the more durable and long-lasting option. As stated earlier, what makes belts so appealing for their price and noise reduction also makes them higher maintenance of the two.

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Timing Failures

Both timing chains and belts have advances in durability and last much longer than their predecessors, but timing failure is still a very real possibility and needs to be taken seriously, as it can have severe consequences on your engine.  

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Sometimes, timing belts will begin to squeal as the engine runs. This is one of the only warning signs of timing failure and should be addressed immediately. It can be a product of a misaligned or improperly tensioned belt, and cause major issues without repair.

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In a wide variety of cases, though, there won’t be a warning. Timing service is one of the most important preventative maintenance items for any vehicle. It’s a silent killer for engines if not taken care of properly.

​How Long Do Timing Belts Last?

Timing belts can often run between 50,000 to 100,000 miles, and replacement should be considered within this range. Chains can run for a little longer, with 80,000 miles considered a healthy interval for replacement that minimizes risk.

​Engine Service & Repair in

Whether your vehicle has a belt or a chain, timing service is vital. Our experienced technicians will gladly help you solve any engine problems you have back on the road again as soon as possible. Schedule your engine service or repair at Toledo Tire and Auto Care today!