Tried bleeding them after replaceing the brakes, but the pressure isnt where it needs to be.
SOURCE: unable to bleed front brakes
loosen the front brake line that goes to the master cylinder fill master cylinder up with fluid and bleed it first by attaching a flexible line from master cylinder front brake side submerge that line into jar of brakefluid keeping air from entering line get someone to pump brake pedal while ur holding line in a jar keep refilling the brake resivoir so no air gets in, once the master is bled front brake side then reattach the origional brake line then remove bleed screw from caliper and let fluid gravity flow down to calliper then bleed the normal way. more than likely your master cylinder has air trapped in the front portion good luck
SOURCE: Bleeding Brakes on a 2001 Silverado Z71
Tony,
When bleeding brakes after the system has been opened for service (you didn't say if you were doing any work on the master cylinder) you should start with the farthest wheel away from the master cylinder, which is the righ rear. Fill the master cylinder, then have an assitant "pump up" the brake pedal. Tell them to hold it down firmly, then open the bleeder on the wheel cylinder(s). Do not release the brake pedal until you have closed the bleeder valve again. You'll know when the air is out - there won't be any more bubbles. Since this vehicle is 2001, this would be a great opportunity to flush the system. Just make sure you have enough brake fluid (DOT 3 or 4, depending on your vehicle). Good luck!
SOURCE: I need to know how to bleed the brakes on a 1999 chevy blazer
6.1.
Right rear wheel cylinder or caliper.
6.2.
Left rear wheel cylinder or caliper.
6.3.
Right front wheel caliper.
6.4.
Left front wheel caliper.
7.1.
Place the hex end of the wrench over the wheel cylinder bleeder valve.
7.2.
Immerse the opposite end of the hose into a clear container partially filled with clean brake fluid.
8.1.
Place the proper size hex end of the wrench over the caliper bleeder valve.
8.2.
Place a clear tube over the caliper bleeder valve.
8.3.
Immerse the opposite end of the hose into a clear container partially filled with clean brake fluid.
SOURCE: 98 chevy S10.Tried bleeding brakes,Front ok,Rear not reacting
Check the master cylinder and make sure it is working correctly and both resevoirs are full.
SOURCE: brake bleeding
if you didn't bleed the lines after putting the master in. then there is a good chance there is air in the lines now. may go through a quart of brake fluid before all the air is out. remember to start at r-rear/ l-rear/ r-front/ l-front last.will take some time. don't forget to adjust the rear brake while your there to help with the pedal
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