Replacing a master cylinder

You will know if your master cylinder goes bad because your brake pedal won't get firm and probably go all the way to the floor. This can happen if you leak brake fluid somewhere and run the master cylinder dry, or it'll just happen with age.

Things you need:

• Line wrenches
• Flat head screw driver
• Sockets and wrenches
• DOT 3 brake fluid
• Plugs for the new master (should come with the new one )

Removing old one:





Basically what it'll look like


• First disconnect the brake lines from the master
• Then disconnect the 2 bolts holding the master to the brake booster
• Carefully pull it out
• Dump out the old brake fluid out of the resevoir
• Pull off the old resevoir because new masters don't come with it

Bench Bleeding:

• Once you put the resevoir on the new master, you have to bench bleed it
• Take the plugs that should have came with the new master and screw them in where all the brake lines go, make them finger tight
• Fill the resevoir with brake fluid and leave the cap off
• Find a sterdy bench or tabel
• Take the pointy end of a screw driver and put it in the back of the master where the piston is
• Lean against the screw driver handle and have the master against the bench.
• Push the piston in on around 3 inches
• Keep doing this untill you don't see any more air bubbles
• When you're done, leave the plastic caps in

Installation:

• Take the new master and slide it on the 2 studs on the booster and tighten them down
• Take the caps out 1 by 1 and put the coresponding brake lines in their holes
• Once all the brake lines are connected, make sure everything is tight
• Bleed the brakes
• Add fluid if needed
• You're done