What does a crankshaft pulley do?

The crankshaft pulley is positioned on the end of the crankshaft. It transmits mechanical power and torque through the pulley system which then operates the engine's accessories (alternator, air conditioning compressor, etc.) through the use of a rubber belt or system of belts.

The crankshaft pulley is also essential in ensuring other engine components operate in unison to allow the vehicle to run smoothly. Doubling up as an internal dampener, crankshaft pulleys also reduce the risk of damage to certain engine components as they reduce the vibrations caused as the engine runs.

The car crankshaft pulley may seem like a minor part in a vehicle, but it is actually a very important part and is vital in the smooth operation of a healthy car.

Suzuki

The Suzuki Motor Corporation is a Japanese multinational automotive and motorcycle manufacturer, established in 1909, over 100 years ago.

How popular is Suzuki in the United Kingdom?

Possibly better known as a leading motorcycle manufacturer, the cars from this marque are becoming a well-known household name in UK motoring. The Suzuki Swift and Suzuki Vitara have made a real impact on UK drivers, being responsible for over half of the 408k Suzuki models on the roads today.

Good value small city cars and SUV driving

Suzuki’s success has been dependent on their provision of small, well-priced cars that offer excellent value and good fuel economy. They offer a selection of city cars and small hatchbacks, with added hybrid fuel options for green drivers and those who want further economy from their motoring.

It’s possibly the Vitara, Ignis and the SX4 S-Cross SUV and crossover models that are making the most impact for this brand, despite not achieving quite the same impressive sales figures as the Swift.

Suzuki provides great technology for budget brand cars

For cars at their price-point, Suzuki crams in a lot of tech. The Vitara, for example, comes with Suzuki’s Boosterjet turbocharged engine and Allgrip 4-wheel drive system for performance, and a host of additional technology for drivability.

It also incorporates driver assistance features such as a lane departure warning that includes visual signals and a vibrating steering wheel, cruise control and fully integrated smartphone connectivity—features you’d tend to expect to find on much higher priced vehicles.

The Suzuki SHVS hybrid system

In the current climate where ecology and green motoring has become prevalent, the ‘Smart Hybrid Vehicle by Suzuki’ advanced driving system reduces CO2 emissions and lowers your running costs. What Suzuki has done here, is create a lighter and smaller system than the standard hybrid arrangement. Combine that with their cars’ lightweight chassis and nimble performance, and the efficiency becomes even more impressive.

How often should a crankshaft pulley need replacing?

A crankshaft pulley can last the lifetime of your car without failing, however unexpected issues can occur which may lead to your pulley needing to be replaced. In general, crankshaft pulleys are not part of regular maintenance so shouldn’t have to be repaired or replaced often

The car crankshaft pulley may seem like a minor part in a vehicle, but it is actually a very important component and is vital in the smooth operation of a healthy car. Therefore if you experience any of the symptoms above you should have your car inspected by a mechanic.

What happens during a crankshaft pulley repair?

Our certified mechanics will:

• Check the condition of the crankshaft pulley.

• If necessary, they will replace the crankshaft pulley.

• Advise if any other related parts need to be replaced.

• Test drive the car to check everything has been fitted correctly.

What causes a crankshaft pulley to break?

When an engine has a bearing failure, this can cause issues for the crankshaft and the pulley tension. Similarly, if the belt tension is too tight or the auxiliary equipment has failed the pulley will also fail.

Most crankshaft pulleys also have a rubber element that is prone to deterioration as it is exposed to continuously changing conditions. If this wears out a replacement pulley will need to be fitted.

What are the symptoms of a failing crankshaft pulley?

Usually, there a few signs you can look for:

• Engine vibrations

• Alternator failure - flickering headlights, car struggles to start

• Rough engine idle

• Difficulty moving the steering wheel

• Difficulty changing gears due to gearbox damage

How often should you replace your crankshaft pulley?

Generally a crankshaft pulley should last the lifetime of the vehicle, however wear and tear does occur so occasionally one may need to be replaced.

What happens during a crankshaft pulley repair?

Our certified mechanics will:

• Check the condition of the crankshaft pulley.

• If necessary, they will replace the crankshaft pulley.

• Advise if any other related parts need to be replaced.

• Test drive the car to check everything has been fitted correctly.

What is the average life of a crankshaft pulley?

A crankshaft pulley can last the lifetime of your car without failing, however unexpected issues can occur which may lead to your pulley needing to be replaced. In general, crankshaft pulleys are not part of regular maintenance so shouldn’t cause you too many issues.

Can you drive with a broken crankshaft pulley?

You should avoid driving with a failing crankshaft pulley as it can cause serious and expensive damage to your engine. If the pulley breaks and the engine continues to run, serious damage could be done to the crankshaft, which would be a very extensive and costly repair. Other belts and components riding on the pulley could also break or become damaged.