How to change brake disc? —China Brake Disc Manufacturer
Hey guys, Qihai Auto Parts here. Today, I’m going to give you my Top 10 tips for changing brake pads and Brake discs. This video isn’t going to go in-depth about changing brake pads and brake discs. I have a few really good in-depth brake videos for both disc brakes and drum brakes and I’ll put a link to those in the description. This video is really about sharing my top tips that people typically overlook while changing their brakes.
Tip #1: Remember to work with your car, not against it. When you’re working on your brakes, it can be difficult to get your breaker bar or even a ratchet onto the bolts on the back here. So to get the bolts out, holding the caliper on, turn the steering wheel. It gives you more access and it makes your life a lot easier. Now look at the difference here. You can easily access the bolts here and the caliper bracket bolts right behind there.
Tip #2: Don’t forget to grease the guide pins. Remove the little rubber boot and then take a towel and clean it off. And then you want to make sure that you use silicone paste on these. Silicone won’t damage the rubber boot. Greasing the guide pins is a commonly forgotten thing to do and I have a video all about this and I even show how it can cause uneven brake pad wear. And it’s just that easy. Now these will slide freely. Make sure to do the bottom and the top.
Tip #3: After you’re getting the caliper bracket bolts out and you take your caliper off, never let the caliper dangle by the brake line. You’re putting way too much stress and pressure on this and the brake line is not designed to hold the weight of the caliper. So instead of letting it dangle, what I like to do is I like to get a bungee cord or a rope and then hang the brake caliper somewhere such as on the shock. And now, the brake isn’t just dangling there. All the pressure is on the bungee cord and there’s no pressure on the brake line itself.
Tip #4: Make sure you clean the brake rotor off with brake clean before you install it. You can see the oily coating on the brake discs, which they use to prevent them from rusting. You want to remove that coating, so take your brake clean, spray it on the surface, and wipe it down with a towel. And look at all that oil we removed. Don’t forget to do the other side as well. Look at that. Now this is ready to go on the vehicle.
Tip #5: Before you put that brake rotor on, get a wire brush and clean the hub right over here. If there’s rust buildup over here but not as much over here, the brake rotor could sit unevenly and that will cause the brakes to warp. But if you use a wire brush and brush all the rust off so it’s nice and smooth and even all around, you won’t have that problem. Another thing to do is add Anti-Seize right to the hub face here and here. With the Anti-Seize on here, it’ll make taking that rotor off really easy the next time you change your brakes so it doesn’t get rust welded to the hub. Now, we can put our brake rotor on. You can see with our brake rotor on it doesn’t want to sit evenly on the hub.
Tip #6: Grab a lug nut, push the rotor so it’s flat against the face of the hub, and screw that lug nut down all the way. Now, your rotor won’t move. This will help you a lot when you bolt the brake caliper back on.
Tip #7: Before you use your brake tool to compress that piston in, get a paper towel and clean around the rubber boot here, and then peel this rubber boot back to expose the brake piston surface and clean all the brake dust on the piston behind the boot. Because the brake piston’s going to be compressed back into the caliper, you don’t want to force all that dirt and debris into the caliper, where it’s going to contaminate the brake fluid and maybe even damage a seal, which would cause a leak over time. A plain towel or even a towel with some brake cleaner on it will do the job. In my case, these are pretty clean because I do this every brake job, but yours might take some more time to clean. Alright, once you clean the dust behind the rubber boot, you can compress that piston.
Tip #8: When compressing the piston, crack the bleeder valve located right here. I’m using my one-man bleeder, which prevents air from getting in the system. You can see the old brake fluid getting forced out as the piston’s getting compressed. This brake fluid right at the caliper gets the hottest and breaks down the quickest. So this process helps get some of that old brake fluid out. And you can add some new brake fluid to the master cylinder when you’re all done. And once that brake piston’s almost completely pushed in, tighten the bleeder valve as you continue to compress the piston. Not only will you remove some of that old brake fluid, but you’re also going to use the bleeder valve, which will keep it from seizing up and it won’t snap off in the future. So a little bit of use keeps that free and moving.
Tip #9: When installing new brake pads, make sure you get brake pads with wear indicators. That’s this little clip right here. This is actually an old brake pad, and you can see the wear indicator sticks out just a little so when your brake pads wear down to about 10-20% left, this will squeak against the rotor. So when you’re driving around and you hear a constant squeaking noise, both while pressing the brakes and even when you don’t press the brakes, you know it’s time to replace your pads. This is a great safety feature because if you don’t have wear indicators, you might not realize your brakes are dangerously low. And as you can see, this brake pad without the wear indicator is worn down all the way to the backing plate, which could be very dangerous. So make sure your brakes have wear indicators. For a few extra bucks, it’s completely worth it.
Alright, your brakes are all done. Tip #10: When you’re done with everything, hit the discs with brake clean one more time to get all that dirt off. Oil and dirt is one of the main causes your brand new brakes might squeak and make noise. You might not even notice, but your hands are dirty, and they could have contaminated the rotor surface. So just to be safe, clean it off.
And those are my top ten brake job tips. And I want to hear some of yours. So make sure you comment below. So hopefully this video was helpful. If it was, remember to give it a thumbs-up. Also, if you’re not subscribed, consider subscribing. Up on the screen are a couple of brake videos that I’ve done. Show you how to change the brakes. You can click on the screen or find the links to those videos in the description. Also in the description are the links to any products that I’ve used in this video.