How do I replace master cylinder on a Pontiac Bonneville?

Answer by  NateB (571)

It should be located on the firewall. It's a simple matter of removing the brake line coming out of the bottom, removing the bolts that hold the master cylinder to the firewall, and sliding it out towards the front of the car. To install the new one, just reverse the steps.

Answer by  carguy12 (136)

Most master cyclinder are just bolted to the fire wall. So start by removing the brake lines leaving the master cylinder, then unbolt it from the fire wall. There is usully a push rod that is activated by the brakes. After you have reversed the process, remember you will now have to bleed the brakes as air may have entered.

Answer by  James916 (539)

You need to drain all the brake fluid out. Then you can unbolt the master cylinder from the firewall. Remove all the brake lines from it. Then you can put the new one in, hook up the brake lines, and fill it with fluid.

Answer by  nicksdakota (74)

Remove the brake lines that screw into the master cylinder. Remove the clip that holds the rod running from the brake pedal, through the firewall, into the master cylinder. Remove the two bolts that hold the master cylinder in place. The master cylinder can now be removed from the outside.

Answer by  NateB (571)

Master cylinders are only held on by a couple of screws. Remove the screws, slowly pull off the old one then reverse the steps to install the new one.

Answer by  Amber40 (24961)

Well usually you start be draining the system and unhooking the brake lines. Then you just unbolt the maser cylinder and replace it with the new one.

Answer by  bigdogg2828 (11)

First you disconect all your fluid lines and change the master cylinder.After you get thet done you reatach lines and bleed the lines by pumping the brakes and loosing lines to get all the air out.

Answer by  Allstar (2071)

empty the reservoir, disconnect the linkage and brake lines, unbolt the master cylinder, bench bleed the new cylinder, re-assemble with new cylinder, bleed the brakes.

Answer by  Doug77 (1433)

Bleed new cylinder in a vise. Remove the lines and bolts on the old cylinder. Install the new cylinder, leaving the lines a little loose. Press brake once. Hold. Tighten.

Answer by  worker8388 (994)

Remove all the break fluid connections from master cylinder. Remove the cylinder by loosening the nuts using socket wrench. Replace the master cylinder and connect the break fluid connections.