crankshaft pulley replacement

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.

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.