Changing front disc pads
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Open the bleed valve to allow the fluid to exit the caliper as you compress it. You do not want to push the fluid back through the ABS system. There could be come crud in the caliper that could cause problems.
I even do this on non-ABS systems. It is a good thing to flush the fluid to replace it with fresh fluid. Water can be in the old fluid and it needs to be removed.
I even do this on non-ABS systems. It is a good thing to flush the fluid to replace it with fresh fluid. Water can be in the old fluid and it needs to be removed.