Master Brake Cylinder Question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jsuh s14 · 04-18-2007, 11:53 PM

what are the symptoms of a busted master brake cylinder? ive heard of some people who have had leaks through their firewalls into where the pedal meets the firewall. Has anyone ever experienced otherwise? Also. what do the brakes feel like wiht a busted MBC. i have bled my brakes properly 7+ times, and i still cant seem to get it to work. thanks for the help guys

xblack240x · 04-19-2007, 12:00 AM

You can sometimes tell you have a busted master brake cylinder when you step on the brake and it goes all the way down to the floor and the car is only slowly slowing down or not slowing down at all.

g6civcx · 04-19-2007, 12:00 AM

Usually you will see fluid leak on the firewall under the BMC and near the brake pedal.

Your brake pedal will feel a little spongy.

What do you mean by "cant seem to get it to work"? Is it not engaging? Is the pedal spongy? What's going on?

slider2828 · 04-19-2007, 12:59 AM

You can do a vacuum tes of the master cylinder. A mechanic can do it for you easily. Simplest way to do is to see if the hose from the master cyclinder is holding vacuum using a vacuum tester that you can rent from somewhere.

04-18-2007, 11:53 PM	#1
jsuh s14 Leaky Injector Join Date: Mar 2007 Location: So Cal 818 Age: 35 Posts: 97 Trader Rating: (0) Feedback Score: 0 reviews	Master Brake Cylinder Question what are the symptoms of a busted master brake cylinder? ive heard of some people who have had leaks through their firewalls into where the pedal meets the firewall. Has anyone ever experienced otherwise? Also. what do the brakes feel like wiht a busted MBC. i have bled my brakes properly 7+ times, and i still cant seem to get it to work. thanks for the help guys

04-19-2007, 12:00 AM	#2
xblack240x Zilvia Junkie Join Date: Mar 2007 Location: Bay Area Posts: 555 Trader Rating: (2) Feedback Score: 2 reviews	You can sometimes tell you have a busted master brake cylinder when you step on the brake and it goes all the way down to the floor and the car is only slowly slowing down or not slowing down at all.

04-19-2007, 12:00 AM	#3
g6civcx Post Whore! Join Date: Apr 2004 Location: Virginia, USA Posts: 5,764 Trader Rating: (5) Feedback Score: 5 reviews	Usually you will see fluid leak on the firewall under the BMC and near the brake pedal. Your brake pedal will feel a little spongy. What do you mean by "cant seem to get it to work"? Is it not engaging? Is the pedal spongy? What's going on?

04-19-2007, 12:59 AM	#4
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	You can do a vacuum tes of the master cylinder. A mechanic can do it for you easily. Simplest way to do is to see if the hose from the master cyclinder is holding vacuum using a vacuum tester that you can rent from somewhere.