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How to change brake rotors and pads?

LouG

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I also suggest that on the front brakes you crack the bleeder and force the pads back with a screwdriver levering against the rotor and caliper.

This prevents any crap in the pucks from being forced back up the line, and I also suggest gravity bleeding them by just opening the bleeder a little when done and letting a little fluid drain out. then add fluid AS YOU GO from corner to corner
Good idea. I remove the pads and spray a dose of brakecleen around the pistons etc before retracting them.
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DarkHorsePremium

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I never thought about using bungee cords before for a brake change! Great suggestion.

Can you post a picture of your pad spreading tool?

I am guilty of being in the screwdriver club. :facepalm:
Sorry for the late reply. Yes. The Lisle 29100. That's the one I have too.
S650 Mustang How to change brake rotors and pads? 3644
 

LouG

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Greetings,
One thing I didn't see mentioned here. I recommend you remove some of your brake fluid from the reservoir before compressing the pistons. When you push the pistons in, the brake fluid level increases in the reservoir. If the top is off it will dump in your engine bay. This will make your life a lot easier. I use a pad spreader. I never use a screwdriver even if I'm going to replace the rotor and pads. Poor man's method.... Some people use C-Clamps, rags and wood door frame shims. If you're not really careful though you'll scratch your calipers. Another item you absolutely need are bungee cords. These are used to hold the caliper up and out of the way. You can wrap it around the spring and then take the tension off of the brake line. Do not let your calipers hang on the brake lines 🙂.

If you're going to do a brake fluid replacement / flush, I use a Motiv bleeder. Another thing that's often overlooked and mentioned above.... A good OBD II reader that can cycle your ABS module. Old fluid will remain in the module if you can't electronically cycle it. I saw something about service mode (above) and don't know if that's just for the parking brake or if it can be used to cycle the ABS module as well. I've only had my Mustang for 2 months but I've been running big brakes for over a decade. Make sure you have a good supply of brake grease on hand, and brake kleen.

When you take the rotors off the hubs, make sure the hub surface is absolutely clean. Wire brush off any surface rust. Put a thin coating of brake grease on the hub or on the back of the disc hat. Don't get any on the lugs. Use brake kleen to clean all of the springs, pins, retention clips and surfaces. Clean brake components function better and remain quiet. You can put a thin film of brake grease on the back of of your pads. It won't hurt the piston boots and further ensures quiet brakes. If you don't put a film on the back plates, vibration will cause noise.

I'll probably think of some other stuff 😂 but these are some key things to look at. Don't scrimp, assemble all the tools you'll need. To get the pins out on the calipers you need a proper punch set. You can do a lot of things with the wrong tools, but you will mar your calipers. Just take your time. Hope this helps.
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BimmerDriver

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Sorry for the late reply. Yes. The Lisle 29100.
That's pretty sweet! I used to have a pad spreader, but it appears that someone borrowed it and never returned it. That's why I hate loaning out tools.

I am a charter member of the long fat screwdriver club. 🪛

The worst brake job I can remember was on my Zupra, putting on track pads. The factory pads are glued on, probably to reduce noise and perhaps simplify installation at the factory. But what a pain to get them off! And yes, I damaged the finish on the calipers. Grrrrrr.
 

DarkHorsePremium

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Are you a Tech, or a very learned DIY'er? This is golden.
@Lou G,
That's very kind of you. I'm just a car enthusiast, a learned DIY'er 👨‍🔧

My Dad started the boys with mini bikes and dirt bikes when I was eight or nine. He taught us how to wrench and ride. That turned into cars. We had a marine dealership for 16 years too so I saw my share of motors. I've never stopped learning. I'm no expert, cars are just a hobby. The 7G forum is great. I've learned so much from everyone. Lots of friendly helpful people here. After coming from Subaru, the Mustang was exactly what I needed. Looking forward to learning my DH. 👍
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