Crank down on the C clamp slowly (so that no fluid shoots out of the reservoir) until there is enough space to fit the new pads and have them fit over the rotor.
This method doesn't open the system, so air can't get in.
(No need to bleed the system afterwards)
:)90 lexus ls 400 how to change front brake pads?Always open the bleeder, then compress with a clamp or large pliers. After installing your brakes, take the top off the master cylinder, fill it up, and crack the bleeders one at a time for a few seconds to let it gravity bleed. If you dont open the bleeders to compress the caliper, you take a chance of forcing old/dirty brake fluid back into the master cylinder possibly damaging it internally.90 lexus ls 400 how to change front brake pads?Open the bleeder valve and push the pistons back. But you should remove the calipers, blow the pistons out with low (20psi) air pressure, clean out the calipers and carefully put them back together. Again you will need low air pressure. If you have never done this try and find a friend or someone that has to help you. Any dirt or crud in the calipers can cause the brakes to lock up.
