Measure brake rotor groove depth Brake rotors are exposed to road dirt and grit and that grit can become trapped between the brake pad and rotor, causing the grit to wear grooves into the face of the rotor. Also inspect for overheating, cracks and rust on the braking surface of the rotor. The lip you are feeling towards the top edge sounds like normal rotor wear. I've also seen some of these mercedes models have the rotors wear out before the pads do. And would put one of my unused cheapo calipers to good use for once. See our tech article on jacking your vehicle. The sound you hear is simply the pad vibrating against the rotors.
Otherwise, throw in another set of pads and go wheelin'. Certainly the shop you contact would like to work on your car, and the possibility of getting your business motivates them. When you apply the brakes, the caliper pushes the brakes into the rotor, which then slows down your wheel. If a vehicle was originally equipped with composite rotors, the original rotors can be replaced with similar composite rotors or cast rotors. But then you either have to grind a new spot each time you make the measurement or you have to lift both wheels up -which I'd rather not- to rotate the disk to the right spot, a pain.
I did think about adding some foil pads wrapped around the caliper fingers and it could be done but it's a bit of hack work and a bit awkward. The checking process takes you less than 5 minutes and is a good safety measure to be in the habit of. Moreover, by no mean it should exceed the minimum brake parallelism values on the list in the manual. I have read that I should measure the thickness in several different places. Remove the pads and hit everything with brake cleaner, including the slide pins.
The noise sounds like metal on metal which is what made me think they need to be replaced. There's also a drastic distinction in top quality and price of the elements utilised, so be sure you discover what exactly pads are being installed to determine the actual worth of the support. A significant difference in rotor thickness may cause the brakes to pull toward one side. With this tool, it makes it similar to having wheel studs, or at least one of them to help you out. This is mandatory to ensure a consistent and smooth braking performance.
You really can't judge the condition by looking at them through the rims and feeling the rotors. It means that the pads are completely worn out. The quality of original equipment rotors can vary from excellent to questionable. Dealer will always swap out the rotors with pads if done under warranty. The other thing I was checking for was - no broken pigtail on the rear springs. In order to be a candidate for resurfacing, the rotor must exceed discard thickness by at least 0. Rotor runout also can be corrected using a conventional bench lathe, but it requires a multi-step process.
Re lube everything with slide guide my favorite from napa ecstuning sells packets for like 98 cents. But several things can cause a rotor to wear unevenly, resulting in thickness variations that produce an annoying pedal vibration when the brakes are applied. Does anybody know the torque specs for the caliper bolts? Can't measure that because of the rough casting in the cooling fins. I would remove all 4 tires and disassemble the brakes to first make sure they just don't need to be cleaned up and re oiled up. I'm planning on pulling the passenger wheel to check it as well but I'm expecting the same results pulled the passenger side wheel and that rotor was 22. Look at the brake disc also called a rotor , but don't attempt to remove it from. Thanks but my breaks aren't squeaking, they're grinding.
Replacing original equipment rotors with ones that do not cool as efficiently because of reduced fin count or fin design may cause the brakes to run hot and increase the risk of brake fade. Important Things To Know About Rotor Thickness In the past, most rotors were designed with enough thickness to go 02 or more pad replacements. How to correctly do the brake pad measurements and take necessary action? Brake pads and rotors are some of the more common items to replace on a vehicle. Most procedures often say you can simply use a micrometer to measure rotor thickness, in 8-10 different places. Doing this will make sure that the rotors have enough metal left for safe braking. There are two layers of rubberized coating and thermal insulation coating on the outside.
. An example is shown below. Same stopping distance and power, but quiter, much easier on rotors, and best of all, leave your wheels cleaner than you can imagine. This sounds very complicated just to measure a rotor thickness but to you none the less. Besides, prices depend heavily on many other factors like type, brand and quality. Consequently, the rotors may be worn down to minimum thickness specifications which is usually marked on the casting itself by the time the first set of brake pads need to be replaced — or even sooner in some cases.
If they are original, probably close to needing replacement. But, quick replacement when the thickness is between 6. And depending on the backing plate it may be hard to measure several places unless you remove the discs. Visually can't detect any difference, so will just revisit things in another 15K km. To be a candidate for resurfacing, the technician must calculate how much rotor material must be removed to level the rotor face and remove the grooves, while still meeting the machine to thickness. It will also reduce the thickness of the rotors, shortening their useful service life.
To measure the brake rotor thickness and parallelism proceed as follows:. Should I just replace both the rotors and pads at the same time or can I only do the rotors? Re lube everything with slide guide my favorite from napa ecstuning sells packets for like 98 cents. If you car runs rough, that's one thing. When the material rubs away completely, the next stage is the failure of the brake. New Vws have more options than ever and brakes are no exception.