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Originally Posted by mmafanatic36
Thanks for the info. I have another question. My corolla had aftermarket brakes on the front installed on it when I purchased it years ago. I've replaced brake pads several times on other vehicles, but not with an ABS system. My question is do I need to relieve the pressure on the system by some technique and do I need to take some brake fluid out of the master cylinder before I compress the caliper (replacing pads and rotors),and is there any reason to bleed the brakes at the calipers? Also, my new brakes came with 2 wear indicators (squealers is what I've always known them as) where do I put them - top or bottom of pad and inside pad or outside. The research I've done online is very confusing and any advice would be greatly appreciated.
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You don't need to relive any pressure as there is none stored in the system. It has been a common practice to open the bleeder, then push the pistons in when dealing with ABS. This is to prevent pushing crude back into the ABS unit. Most modern ABS systems have screens that prevent this, and I have never seen a problem from just simply pushing the pistons back.
I do recommended removing the master cylinder lid before retracting the piston. If there is too much fluid, it will be pushed out. Also make sure that after pumping up the brakes that the fluid level is only up to the Max line. Brake fluid will expand, so it need a little room in the reservoir.
You don't not need to bleed the brakes, but if your fluid is older then 3-4 years you may want to consider replacing it.
As a rule the wear sensors always go opposite the rotation of the rotor when driving forward. Most times they will go on the inside, but they can go on the outside if there is no interference.
Mike