A brake disc is usually an iron (or carbon composite) disc that is attached to the suspension of a car, motorcycle or even bicycle and is gripped by brake pads held in a brake calliper. The friction between the brake disc and the pads is what brings the car to a halt. The brake disc has numerous advantages over the brake drum, because it dissipates heat quickly, giving strong and consistent braking performance. Disc brakes also give the driver more ‘feel’ at the pedal, allowing him or her to more easily modulate the pressure for a smooth stop. In higher-performance applications, a brake disc will comprise two discs attached side by side by various rotors. This, in effect, makes the disc ‘ventilated’ further helping to cool and performance. Brake discs are also commonplace on motorcycles, where they are drilled to improve wet-weather braking performance. Instead of the brake pad having to compress any water on the surface of the disc, which hampers stopping ability, the water is pushed into the holes on the disc, thereby allowing the brake pads to grip the disc as intended. As a way of avoiding the stresses associated with excess heat build-up during braking, some discs are sometime mounted almost loosely on to the hub via coarse splines. This loose mounting allows the disc to expand evenly with the heat, and stops it transferring too much heat to the hub on which it is mounted, which could cause a failure. Disc brake technology has advanced to the point where it is not only used on cars and motorcycles – pedal cycles now commonly have disc brakes as standard because these provide stronger and more consistent performance in adverse weather. Such braking systems are also light enough that they don’t impact on the overall performance of the bicycle.
Brakes are the most important safety feature of your vehicle. They can wear differently depending on vehicle and driving conditions, so it’s important to know the signs of worn-out brakes. There are five major symptoms of worn brake pads & discs — and vehicle owners should be aware of all five.
This issue can have a variety of causes, but the most common is a stuck brake calliper. When this happens, the brakes never totally disengage, so you’re driving with a constant, slight pressure on the brakes. If you suspect this problem, try putting your hand near your wheels after you’ve just driven your car. Stuck brake callipers can cause heat to emanate from wheels after driving. A stuck calliper can cause a lot of wear on your brakes and transmission, so don’t wait to fix it.
If your brake pedal is softer than normal or sinks to the floor, it’s a sign of serious trouble. It can mean a leaking master cylinder or brake lines. Check your brake fluid levels, looking especially for leaks near the pedal, and seek professional advice immediately. A pulsating brake pedal, meanwhile, usually indicates warped or out-of-tune brake discs.
This common problem is usually the result of warped front brake discs or brake pad impressions. Since pads should be flat and even, impressions or indents can cause a shaky stop. Pad impressions can form when a vehicle sits for a prolonged period of time without being driven. This is especially common in hot temperatures and high humidity. Unless your brakes are rusty, this problem often requires only some refinishing work.
This is usually an issue with the car’s rear brakes. Your rear brake drums might need resurfacing and replacement. These and other brake maintenance tasks can be done at home. But it’s much easier and safer to take it to the professionals. Contact Many Autos for your car’s full-service. We do brake pads, brake discs, cylinders, and more. If you’ve got worn brake pads & discs, we’ve got the expertise to keep your brakes in top shape and your vehicle and family safe.
Sometimes, the worst part of getting your car fixed is having to bring it to the garage We are therefore happy to offer our customers a collection and delivery service If you prearrange a collection, we will pick your car up from your home or place of work and drive it to our premises, carry out all the necessary work (having consulted you) and deliver it back to you at the end of the day.
We are able to tow, jump start or repair your vehicle if you are experiencing problems or broken down for a small fee. If we can’t sadly start your vehicle, we can contact a local recovery firm to collect your vehicle for a very competitive price.
Here at Many Autos, we believe that we offer a valuable product with our Free Collection and Delivery Service, we can collect either from your place of work or from your home address. If you are unsure about whether the address you are considering having your vehicle collected from is not within our range, then please do contact us.
Many Autos operate a fleet of pool cars with a dedicated driver, so wherever we are collecting from, we need to be able to leave one of our pool vehicles either in your work car park / parking space, or if in a residential area, we would need to be able to leave our car either at your house or on the road with a permit if required. We would be grateful if you could bear this in mind when booking to use our free Collection and delivery service
When one of the red or yellow brake indicators on your dashboard lights up it may mean you’re just due for an inspection. It could also be your vehicle’s smart electronics alerting you to a problem. An engaged parking brake could also cause the light to go on. Be sure it’s fully released to confirm that’s not the issue.
That’s likely the sound of the brake pad wear indicators. They’re made of steel, so they make this sound when they start If you start hearing a high-pitched noise that stops when you apply the brakes contacting the rotor. They’re letting you know that your pads are worn out and need to be replaced before you get rotor damage, which can be an expensive fix.
Grinding that you also feel in the pedal could mean a number of things. There could just be some gravel, or a rock caught in the calliper unit, easily remedied.
But you may have gone too long without brake servicing. The brake pads may be worn through, and you’re hearing metal on metal that could be creating grooves in the brake rotor. Not good.
Grinding could also be an indicator of lack of lubrication in vehicles with rear drum brakes. The brake shoe (the component that presses on the rotor to slow the vehicle) could be scraping on metal contact points like the backing plate, due to rust. If you hear any of these sounds, get your brakes looked at right away to head off more expensive problems
Shaking in the steering wheel or vibration when you apply the brakes may be the result of an uneven rotor.
Brake rotors are big discs that sit inside of the wheels. When you hit the brake pedal, the brake pads hug the rotors, slowing them and your vehicle. You want rotors to be smooth and completely even in thickness. Over time and thousands of wheel revolutions, it’s normal for the rotor surface to get slight variations. Rust can also sometimes develop. During brake servicing, the face of the rotor is often trued (smoothed and evened out) to correct these flaws.
This work has to be done exactly to your vehicle’s specifications. The tiniest differences in disc thickness — we’re talking thousandths of an inch, about three sheets of paper in width — can cause a wobbly feeling when you brake. An uneven rotor surface may also cause the rotor to hit one of the brake pads as it spins, causing some of the pad material to transfer onto the rotor in that spot. Then you’ll feel shaking when braking, as the pad hits that bump in the rotor.
Another possible cause of rough braking is the brake calliper not releasing properly. The job of a brake calliper is to squeeze the brake pads against your brake rotors, which slows your vehicle down. It’s the motion of the piston inside the calliper unit that causes this contact.
Due to wear from heat or road debris, the piston can get sticky. It may not retract the pads back into the full “off” position when you let up on the brake pedal. A fourth cause of bumpy braking could be damage to your brake components from improper wheel lug nut installation. (The lug nuts are the big bolts that clamp your tire and wheel onto the hub of your car.)
Any time tires are removed, it’s crucial for the lug nuts to be put back on in the right order, evenly, at just the right tightness (torque). It has to be done in a star pattern, with just the right pressure. If not, you’ll get uneven, premature rotor wear and be back for service sooner rather than later.
If you’re experiencing a soft brake pedal, have a service technician look for fluid leaking from the master cylinder or elsewhere in the brake system. The master cylinder is the unit that creates the power for your brakes. It has a reservoir like the one for your wiper fluid that contains brake fluid. When you apply the brakes, this fluid is pushed through thin piping, creating hydraulic pressure. If fluid is leaking from this system, there may not be enough power to force the brake pads to clamp hard to the rotors.
If you notice a difference in the resistance in the brake pedal — it feels “softer,” or sinks all the way to the floor mat when you press on it — it’s a sign you need immediate service. There could be air or moisture in the braking system or a problem with the master cylinder. Generally, in autos with power brakes the pedal should stop 1 to 1 ½ inches from the floor. If you have manual brakes, the pedal should stop more than 3 inches from the floor
This could be caused by a brake hose gone bad or a calliper problem. One brake calliper may be applying more or all the pressure during braking, resulting in unbalanced stopping
A sharp, chemical odour after repeated hard braking on steep roads is a sign of overheated brakes or clutch. Pull over immediately in a safe place, check your parking brake to make sure it’s fully released and allow the brakes to cool. If you don’t, you risk heating up the brake fluid to boiling, which can cause brake failure. If there’s any smoke coming from a wheel, it may be a stuck brake calliper and possibly unsafe to continue driving on without repairs.
If your vehicle rocks or bounces with sharp braking, it’s probably not a brake problem at all. Your shock absorbers may need to be replaced.
Not every brake noise or symptom is going to cost you. It could be a harmless squeak from certain types of material in brake pads. There may be dust or moisture somewhere in the braking system that isn’t causing damage. You may just need to add new brake fluid.
But you need to be sure.
Brake parts wear out over time. Self-diagnosing symptoms or delaying brake servicing could put you and your passengers at unnecessary risk. And like with a lot of automotive issues, if there is a problem, the longer you put it off the more you risk big repair bills.