Brake pads worn to what extent it is time to replace
Most car owners do not wait until the alarm to replace the brake pads, during maintenance the maintenance staff will do a simple inspection of the car, the thickness of the brake pads is one of the most important.
If the brake pads are found to be thin and reach the replacement standard, the owner will be advised to replace them.
The brake pads affect the safety, once worn out there is no brake, so as long as the maintenance staff recommended the owner to replace, most owners will heed the advice, directly replaced.
In fact, brake pads, like other maintenance items, are sometimes asked to be replaced early.
I have seen the earliest brake pads replaced, the thickness of about a third of the brake pads were replaced, they look very thick, in fact, they can still be used for a long time.
So to what extent should the brake pads be replaced?
Generally two or three millimeters left should be replaced, estimate the thickness by yourself.
If you don’t know how thick two or three millimeters is, you can also compare it with the height of the alarm pad, if it is about to wear to the alarm pad, it is time to change it.
If you have already worn to the alarm piece, then no need to tangle, directly replace it.
The best way to check the thickness of the brake pads is to remove the tires so that you can see the remaining thickness at a glance and see it accurately.
In practice, the majority of repairers are reluctant to remove the tires and use a flashlight to check the outer brake pads from the outside, as well as reaching under the car and checking the inner brake pads by touching them with their hands.
Generally speaking an experienced repairer can judge accurately, even without removing the tires, the thickness he judges is not much different from the actual one.
If inexperienced, there is often a case of error in judgment, the actual thickness is still very thick, their own judgment is very thin, it will be recommended that the owner replace, at this time there will be the beginning of the thick let the owner change.
This is certainly not to pit the owner’s money, but the repairman’s error in judgment.
After removing and found that there is still very thick, the owner has promised to replace, as long as the owner does not say, will not put the old again, continue to replace the new.
So that the owner actually spent money in vain, would not have needed to be replaced.
Some cars with more kilometers have deeper brake disc wear. Checking the inner brake pads, using the way of touching them by hand, often makes some maintenance workers make mistakes in judgment.
The brake disc is deeply worn, but only the area covered by the brake pads is deeply worn, the brake pads do not cover the entire brake disc, so the outermost circle of the brake disc is not worn, or the original thickness.
Suppose the brake disc is worn 2 mm deep and the brake pads are still 4 mm deep, from the outside, the brake pads are only 2 mm deep, because there are still 2 mm into the brake disc, it will be mistaken that the brake pads should be replaced.
Check the thickness of the brake pads by yourself.
If the thickness is very thick, you can see it from the outside at a glance, so you don’t need to remove the tires.
If the thickness is thin, it is not easy to grasp the thickness accurately because the line of sight from the outside is oblique, and the inside piece is invisible, so it is best to take the tire off to check. To check the thickness of the brake pads, both pads should be checked.
Many cars will have two pads with different wear, one thick and one thin.
If you only check one piece and happen to look at the thick one, there is a risk of the brake pads wearing out if you continue to use the car.
so brake pads worn to what extent it is time to replace.