Remove and replace brake master cylinder - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Mechanical "If it moves, rotates, spins, pings, shakes, or goes clunk, here's how to fix it -- without duct tape. MAny area's of Mechanical help for our GM produced cars and trucks.

Thread Tools Search this Thread
Old 02-04-2009, 10:52 AM   #1
Retired Senior Admin

Expert Gearhead
Thread Starter
Danthurs's Avatar
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default Remove and replace brake master cylinder

For this you can replace your master cylinder with a new/rebuilt unit, or remove yours and rebuild it,

Make sure you cover your fender to prevent scratches or brake fluid dripping on your paint.

Locate your master cylinder. It'* on the drivers side fire wall.

First thing you will need to do is unplug the fluid level sensor. Pull on the plug, not the wires.

You will need a small pan or cup to catch your brake fluid. Do not reuse this fluid. Only use new fluid to refill the reservoir. Remove these two brake lines and allow reservoir to drain in to pan. Cover tube ends to prevent debris from entering the brake system.

Now, there are two bolts holding the master cylinder to the brake booster. You will need a 15mm wrench to remove these. One on each side.

Here is the other.

Now, simply slide the master cylinder out.

Rebuild your master cylinder or use a new/rebuilt one

Install master cylinder in the reverse order as it was removed. Torque bolts holding master cylinder to brake booster to 20 ft lbs.

Install brake lines and torque to 11 ft lbs.

Plug in brake fluid level sensor.

Fill reservoir to the full line.

You will need to bleed all 4 brake calipers to ensure ALL air is out of the brake lines.

Press brake peddle with your foot. It should feel firm and not fade. Hold peddle down, it should stay in place. If not, bleed the brakes some more.

Check the
reservoir several times while bleeding. Keep it full.
Danthurs is offline  

Related Topics
Thread Thread Starter Forum Replies Last Post
how to replace clutch master cylinder and slave 1986 corvette nikos Chevrolet 0 04-05-2015 10:44 AM
can i replace the master cylinder w/abs on my 88 sse myself? 88bonnsse 1987-1991 7 05-03-2007 03:56 AM
'91 Olds 98 Master Cylinder Replace dandyd 1987-1991 5 04-02-2007 12:13 AM
re: master brake cylinder Joey_Malone 1992-1999 3 10-26-2003 07:40 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 01:48 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.