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Why is my engine squealing? - Media

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Why is my engine squealing?

It can be a bit embarrassing, know what the issue could be

Why is my engine squealing?

Why is my engine squealing?

It can be a bit embarrassing, that loud, high-pitched squealing sound emanating from under the bonnet of your car. But do you need to be worried about more than blushes, and what exactly is causing it?

The most likely cause of this kind of engine noise, especially if your vehicle is relatively new, is a worn, slipping or loose belt (belts drive the fan that cools the vehicle's engine as well as other major engine systems), and it does require attention. If it breaks, you could be stranded.

A good indicator that the problem is belt-related is if the noise starts when you accelerate or gets worse when you accelerate. Another sign is if the noise starts when the air-con is switched on, as the air-con compressor is powered by a belt. Other symptoms of a belt problem can be difficult steering, the battery light coming on (the alternator, which charges the battery, is driven by a belt) or overheating.

If you're lucky, all that a mechanic will need to do is tighten the belt tensioners to correct the tension of the belt. Another possibility is replacing the belt, which is another relatively inexpensive fix.

A bigger, more expensive fault could be worn belt tensioners, which are no longer able to keep the belt at the correct tension. Similarly, another mechanical possibility is worn pulley bearings: the belts run on a system of pulleys that spin, and if the bearings of these pulleys are worn or damaged they may be noisy.

An alternative cause for a loud squeal could be a worn alternator (which is responsible for charging your car's battery). In this case, the bearings have worn and are making the noise. The result is an alternator that isn't capable of charging your car's battery effectively, which could leave you stranded at the side of the road. Whatever the reason for your car squealing, you should book it into the closest of Toyota's 200-plus dealerships in South Africa for attention.

Why is my engine squealing?

It can be a bit embarrassing, that loud, high-pitched squealing sound emanating from under the bonnet of your car. But do you need to be worried about more than blushes, and what exactly is causing it?

The most likely cause of this kind of engine noise, especially if your vehicle is relatively new, is a worn, slipping or loose belt (belts drive the fan that cools the vehicle's engine as well as other major engine systems), and it does require attention. If it breaks, you could be stranded.

A good indicator that the problem is belt-related is if the noise starts when you accelerate or gets worse when you accelerate. Another sign is if the noise starts when the air-con is switched on, as the air-con compressor is powered by a belt. Other symptoms of a belt problem can be difficult steering, the battery light coming on (the alternator, which charges the battery, is driven by a belt) or overheating.

If you're lucky, all that a mechanic will need to do is tighten the belt tensioners to correct the tension of the belt. Another possibility is replacing the belt, which is another relatively inexpensive fix.

A bigger, more expensive fault could be worn belt tensioners, which are no longer able to keep the belt at the correct tension. Similarly, another mechanical possibility is worn pulley bearings: the belts run on a system of pulleys that spin, and if the bearings of these pulleys are worn or damaged they may be noisy.

An alternative cause for a loud squeal could be a worn alternator (which is responsible for charging your car's battery). In this case, the bearings have worn and are making the noise. The result is an alternator that isn't capable of charging your car's battery effectively, which could leave you stranded at the side of the road. Whatever the reason for your car squealing, you should book it into the closest of Toyota's 200-plus dealerships in South Africa for attention.