Squeaking brakes: Causes, diagnosis, remediation
How to get rid of squeaky brakes: Top 5 options
Do you like it when the glass is carried out with a nail? We believe it is not. This same list is extremely irritating for the delicate human ear sounds include squeaking brakes. Squeaking car brakes the phenomenon is very unpleasant, and no matter whether you are standing on the sidewalk near where the car’s brakes, causing a high-frequency squeaky sound throughout the County or are in the same machine. It will irritate in any way.
But for drivers like “singing” brakes can be a clear indicator of the failure experienced. With a variety of frequency sounds will speak about different degrees of problems. Ignore the signal may cause serious damage or even an accident.
As you can see the topic is important, so if you do not know why suddenly began to squeak in the brakes, and trying to find the answer on the Internet, maybe this Top 5 most common causes of the squeak will help you to get to the truth. If not – feel free to go to checked the car refinishing professionals with extensive experience will identify the problem and solve it in the shortest possible time.
So let’s start. The first thing I would like to mention, the soundtrack may be different. From the high-frequency squeak, to charcana. From the constant sound while driving, to short-term pressing on the brake pedal. All these pieces of the puzzle will help to identify the specific cause of the sound, and then a chance to rectify the situation.
The nature of a sound coming from the brakes is always one – it is based on vibration of one or more metal components of the braking system.
Please note that pads are divorced from the brake disc surface at a very small distance – less than a millimeter. This allows the brake mechanisms operate at lightning speed, but also the nuance of the design leads to trouble if your brake disks are not monitored. For example, the brake disc may appear runout like this:
Therefore, the disk surface will touch the surface of the brake pads, which will lead to the emergence of a rhythmically recurring sound of the scrape sound. The reason for the “floated” drive could be overheating or sudden cooling after prolonged braking (a car drove into a puddle on the road). Also, the runout of the face of the “extreme athletes” who love to potriviti releasing the handbrake or just inattentive drivers, forgetting to remove the car from the hand brake. *
*The sound can appear even on a new brake disc if its exploitation does not imply such loads.
1. The first most common cause is worn parts (brake disc pads)
Brake pad wear
Indeed, not all motorists in time to change components on their cars. Do not follow his “iron horse”, and then wonder: “Why is the car making strange noises?”
In very advanced cases, motorists wear pads to zero, to the metal substrate. A rare phenomenon, but is the place to be. The metal starts to RUB on the metal, producing unbearable for all living beings gnashing. Terribly irresponsible attitude to security!
It’s just the finish
Such “pads” the car completely stops braking. He begins to lead the side and the pistons of the calipers out of their seats so far that can at any time to jam the wheel!
Worn in a “zero” on the left and the new block on the right
To prevent this kind of incident, the engineers invented the “indicator pad wear”. Metal bracket protruding above the surface of the base metal plates two or three millimeters. When the time comes to change the pads, you will hear a slight scratching sound. Don’t ignore it, because it’s time to replace your old pads. Possible buy pads with this indicator, it is not all manufacturers of brake pads.
The wear indicator “the Squeaker” specifies the finger in a blue glove
How to fix the problem: Replace the pads on the new one. Recall that the changes set in pairs: the front pads on the left and right side.
The wear of the brake discs
Some motorists completely forget about the fact that the brake discs also wear out. Albeit much slower. Compare front pads basically go from 15 to 35 thousand kilometers. The spread is dictated by different quality and composition braking surfaces. Loaded front discs will not require replacement for 100 thousand km and more. But this does not mean that they forget. And do check out their thickness.
Thickness is checked with a caliper at the center of the disk. Each type of brake disc minimum thickness may be different. For example, the new disk is 24 mm in thickness, completely worn out – 22 mm.
Gradually grinds metal, the thickness is reduced, it is time to replace the drive. An example of a terribly worn-out brake disc. Who brought him to this state – a complete ignoramus:
Wearing, CD “young trees are consumed by” the Central part. The sides are formed bumpers. Very quickly, the cast iron begins to oxidize, the rust appears. Touching this edge, an additional unpleasant rasping sound.
A rusty rim around the edge of the brake disc
And we sandpaper grate
How to fix the problem: the Cause is easy to eliminate: grind sandpaper rusty bumpers. If the thickness approached the minimum threshold or you drive more than 100 thousand km – replace the disks. Change in pairs. The front and back.
Lifehack. When you install a new brake disc, don’t forget to clean the hub surface of rust and grease it with copper grease. Otherwise, the runout of the disk will not be avoided.
2. The reason is contamination of brake discs and pads
Please note, over time, the discs appear grooves. The reason for this – the dirt: particles of sand, dust, dirt. Poor quality pads with a large amount of coarse abrasive particles also affect this factor. All this unevenly wears out the surface:
Wear can also occur due to rusting of the disk. You probably noticed that after a long Parking lot in the rain the wheels covered brown patina. Nothing good it promises.
Pollution has negative effects on the stocks. The dirt literally eat into them, that leads to poor braking.
How to fix the problem: clean the surface of the pad is easy enough to walk on its surface malobragino emery paper (marked from 100 to 200). Discs can be cleaned with brake cleaner. If he is very rusty, it is better to change the brake discs on the new one.
3. Wear or breakage of parts of the caliper
Brake is a reliable and smoothly working mechanism. However, there are many reasons why the pads no longer relaxed, pressed straight and so on.
How to fix the problem: the Fingers of the caliper guides and the pads should be oiled, not to have a rusty patina or dirt. Especially true to do their audit after the winter. Otherwise, you will hear a prolonged creaking that would signal that your pads haven’t stood in their place after braking.
Also do not forget about the pistons in the caliper. They also need to be checked after a salty winter. The anthers should not be torn, on the surface of the pistons should be no damage or mineral deposits, and the pistons should not jam during operation.
Care require springs and drum brakes brings the pads:
4. Lubrication of brake mechanisms
Yes, brakes need to lubricate where there are moving parts. To work they’ll be better, and extraneous noise will be less. Don’t know how to do it? Contact your mechanic. For 2000 rubles, you will move and oil all the parts needed all four brakes.
5. Dustproof screen
Finally, internal dustproof screen can easily bend and start scratching the disk, causing an unpleasant sound.
How to fix the problem: it is Treated just bent it away from disc or replace a new one.