I open the bleeder before pushing the piston in. This keeps the heat cycled fluid from going back into the master cylinder. It also partially flushes the fluid. Also with the pads backed off the rotors you can get a better feel on the wheel bearings. I found a bad bearing on a pickup that came in for a brake squeek only on left turns yesterday.
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02 Saturn L200 5 speed- 265k miles
84 Gmc 6.5 na diesel K30 4x4, TMU
2006 Lincoln Navigator, 215k miles
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