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Our expert insights into crankshaft pulley replacement
What does a crankshaft pulley do?
The crankshaft pulley is mounted on the end of the crankshaft. Its purpose is to transmit mechanical power and torque through the pulley system to turn the drive belts that operate the engine accessories (alternator, air conditioning compressor, etc.).
What are the symptoms of a bad crankshaft pulley?
Below are the top three symptoms that could indicate you need to replace your crankshaft pulley:
Engine vibrations
Alternator failure - flickering headlights, car struggles to start
Rough engine idle
What happens when we do a crankshaft pulley replacement on your car?
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.
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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.
Smart
Smart is a German automotive brand, established 25 years ago in 1994.
The company is a division of the automotive corporation Daimler AG and operated under the ownership of Mercedes-Benz.
How popular is Smart in the United Kingdom?
Smart isnt’ the most popular brand in the UK, most likely due to appealing primarily to parking-challenged city-dwellers; there are only 96k of their vehicles on the roads of the UK today.
Showing steady growth, however, since their introduction to the UK market in 2003, the trend would suggest that we’re likely to see more of these eccentric looking tiny cars as time goes by.
Smart: Quirky little microcars and subcompacts
Owned by Mercedes-Benz, Smart cars fit into the market you’d expect on first glance. They’re a fun and funky little city car; they’re solid, middle of the road machines, designed to be as versatile as they look.
A Smart car will never fool anyone that it’s a hi-end, luxury vehicle. There’s plenty of glossy plastic and groovy fabrics, yet in the cockpit, you’ll find up-to-the-minute touchscreen media options at the controls. They do come at an inflated price for the small city car market, but by nature of their unique design—there’s nothing quite like them.
Smart cars are cheap to run—but not so cheap to buy
Your Smart ForFour will be more expensive by comparison than its rivals: the Fiat 500, Skoda Citigo, Kia Picanto or Hyundai i10—yet it’s rather hard to pitch the Fortwo against anything because there isn’t anything on the market quite so small. Only the Renault Twizy comes to mind, and that’s barely a car at all.
Once you’ve got one though, your Smart car will cost next to nothing to run with their tiny wheels and low weight. The electric models perform even better with a fuel equivalent of 87mpg.
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.
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