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Having trouble bleeding brake lines for 2005 chevy trailblazer replaced pads and rotors along with passenger side caliper have been getting air in the lines for three hours

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Hi. First you need to gravity bleed the left caliper or wheel cylinder, if you replaced a large section of line it will take longer to bleed. If you ran it low on brake fluid until the brake pedal was on the floor, then you may have damaged the master cylinder, and will need to replace it in order to bleed the brakes.

Posted on Sep 04, 2010


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Put in new calipers and brake pads but I am getting no pressure on the passenger side front brakes. Tried bleeding the brakes but I am getting nothing from the bleeder on the passenger side, no air or...

it sounds like you are having trouble with one of the centering valves
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Antilock brake systems don't like fluid pushed back through the system.

You should follow good standard practice, by blocking and ensuring the car is stable and safe.

When the wheel is removed, clamp off the flexible brake fluid line. When you push he caliper back to change the pads, do it with the bleed screw open and catch the fluid that comes out. When the caliper is fully depressed, close the bleed screw up. Change the pads, ensure you put anti-squeel on the outter surfaces. Inspect the clips, ensure they are all seated properly.

Check the runout on the rotor, make sure it's not warped. Get them turned or replace them as necessary.

When done, reinstall everything and remove the clamp.

Start the truck, pump the brakes a few times to get fluid back to the front calipers. Inspect the fluid level in the resivoiour to ensure enough fluid is there.

Do some safe test brakes to ensure all is ok.

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