The 8th Gen Riviera Resource
 
HomeDashboardSearchRiviera Questions & AnswersWrite-Ups IndexRegisterRelated LinksLog in

Share
 

 Write-Up: Brake Master Cylinder - Install & Bench Bleed

Go down 
Go to page : Previous  1, 2, 3, 4  Next
AuthorMessage
95ParkAveUltra
Member


Joined : 2009-01-26
Post Count : 68
Merit : 0

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: bad master cylinder?   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyWed Apr 07, 2010 11:35 pm

im pretty sure its the MC but want a second opinion to make sure its not the booster. when i brake from a good amount of speed. pedal is alil soft goes down about halfway and car stops. now when i let up alil and let the idle move me. press back on the pedal and it goes to the floor. if i let up and brake quick and hard i have pressure again and car stops. started this about two days ago. fluid level has not changed.
Back to top Go down
Mr.Riviera
Expert
Mr.Riviera

Name : Matthew
Age : 33
Location : Florida
Joined : 2007-01-17
Post Count : 4394
Merit : 101

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyWed Apr 07, 2010 11:37 pm

sounds similar to what mine is doing. i just bought a new MC and plan on replacing it this friday. i'll report back and let you know if it fixed the problem.
With mine though the peddle slowly sinks to the floor when at a light then if i let off it's fine and at normal height. no leaks.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily
Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Dsc_0110
Back to top Go down
95ParkAveUltra
Member


Joined : 2009-01-26
Post Count : 68
Merit : 0

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyWed Apr 07, 2010 11:43 pm

ya sounds the same. but mines getting pretty bad. almost rolled into someone( wasn't watching, my bad) i will probably end up changing it tomorrow though. got the time and money on hand so y not.
Back to top Go down
Rickw
Guru


Name : Rick
Location : Lancaster, MA
Joined : 2008-09-13
Post Count : 6218
Merit : 111

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyWed Apr 07, 2010 11:45 pm

Definitely sounds like a Master Cylinder, if you are loosing NO fluid.
Back to top Go down
95ParkAveUltra
Member


Joined : 2009-01-26
Post Count : 68
Merit : 0

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyWed Apr 07, 2010 11:50 pm

k thanks. if i change it tomorrow. will post back and let yall know.
Back to top Go down
98inSFl
Enthusiast
98inSFl

Name : Ed
Location : WPB Florida
Joined : 2010-01-16
Post Count : 249
Merit : 14

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyThu Apr 08, 2010 2:37 am

Bad master for you both.

A bad booster will fail to assist (like the car is off) or have a vacuum leak that affects idle.
Back to top Go down
Mr.Riviera
Expert
Mr.Riviera

Name : Matthew
Age : 33
Location : Florida
Joined : 2007-01-17
Post Count : 4394
Merit : 101

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyThu Apr 08, 2010 11:56 pm

Brake Master Cylinder Write-Up

Tools Needed:
14mm open ended wrench
5/8" deep well socket
ratchet with long extension
brake fluid x3 (i used DOT 4 synthetic)
New/reman master cylinder (part # 25632708 for acdelco dealer replacement)
bench bleeder kit
pliers and flat head

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 P4080010

1. Start by removing the strut tower bar if your car is equipped with one.
2. Next siphon out the old fluid from the reservoir on the MC.
I laid out a towel on the fender and below the MC because brake fluid likes to eat paint!
Note the coke bottle to catch the old fluid.
Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 P4080011

3. Un-clip the level sensor and set it out of the way. Be careful as there is a pull tab on the bottom holding the clip on.
4.Remove both nuts holding the MC on the brake booster with the 5/8" socket.
5. Disconnect the brake lines going to the MC with the 14mm wrench.
Fluid will still drain at this point so you may want to have a small catch ready.
Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 P4080012

6.Using the pliers and screw driver remove the ABS tube from the MC and set aside. DO NOT drain the fluid from this tube! If air enters the EBTCM you will need a tech-II to bleed that part of the system.
7.Finally remove the old MC from the car. Again, the brake fluid will eat paint so watch for drips.
Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 P4080013

8.Bench bleed the new MC on a vise and reinstall. I do not have a vise so i bolted it to the booster and pumped the brake with the MC disconnected from the lines.
Pump the fluid until there are no air bubbles coming through the lines.
You will need about a bottle and a half to completely fill the MC and reservoir. Only depress the piston inside the MC about 1".
Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 P4080014

9.Reconnect the brake lines and have someone hold the brake while you tighten the line nuts down.
10. Plug in the level sensor.
11. Start vehicle and check for leaks while pumping the brake.
Note, the peddle will likely be very spongy due to air in the lines. You will need to bleed all 4 wheels and top off the fluid as you go.
12. Stand back and admire your fully functioning brakes and clean reservoir.
Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 P4080015

If you liked this write-up please give me a "+" or feel free to post if i left something out.

-Matthew

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily
Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Dsc_0110


Last edited by Mr.Riviera on Fri Apr 09, 2010 9:37 am; edited 1 time in total
Back to top Go down
Eldo
Expert
Eldo

Name : Mark
Age : 54
Location : West Salem, Oregon... FINALLY
Joined : 2009-04-09
Post Count : 3046
Merit : 102

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyFri Apr 09, 2010 12:52 am

Very nice write-up. Just one small correction: #3 - "Un-clip the Low-Fluid-sensor connector and set it out of the way", not the the ABS connector...
Back to top Go down
BrianEsser
Enthusiast
BrianEsser

Name : Brian Esser
Age : 43
Location : Ohio
Joined : 2010-01-22
Post Count : 168
Merit : 8

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyFri Apr 09, 2010 12:57 am

Another thing you may mention is, when bench bleeding, DO NOT depress the master cylinder piston all the way, or you may damage the internal seals.
Back to top Go down
http://www.brianesser.com
robotennis61
Guru
robotennis61

Name : robotennis
Age : 58
Location : las vegas
Joined : 2007-12-17
Post Count : 5561
Merit : 142

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyFri Apr 09, 2010 1:27 am

dynomite job mr.Riv. dynomite!
Back to top Go down
Mr.Riviera
Expert
Mr.Riviera

Name : Matthew
Age : 33
Location : Florida
Joined : 2007-01-17
Post Count : 4394
Merit : 101

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyFri Apr 09, 2010 9:38 am

fixed, and thanks for the comments.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily
Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Dsc_0110
Back to top Go down
werdstrave
Enthusiast
werdstrave

Name : Drew
Joined : 2011-09-12
Post Count : 153
Merit : 1

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptySat Dec 01, 2012 11:30 pm

Hey guys,

I've had similar symptoms to both 95ParkAveUltra and Matthew above. Brake pedal is spongy but will stop the car. At a full stop, the pedal can be depressed to the floor. When pumped, it acts correctly. No hard stopping power at all though.

I replaced my master cylinder today and rear two calipers. All calipers are now new. Bled and changed fluid. However, I still have the same symptoms.

Am I missing something? Is my new MC bad? Please help

- Drew
Back to top Go down
albertj
Guru
albertj

Name :
Location : Finger Lakes of New York State
Joined : 2007-05-31
Post Count : 7446
Merit : 148

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptySun Dec 02, 2012 12:36 am

Ok I get it now.

Look for one or more bad wheel cylinders, a bad brake line, or is your abs light on?

Albertj
Back to top Go down
werdstrave
Enthusiast
werdstrave

Name : Drew
Joined : 2011-09-12
Post Count : 153
Merit : 1

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptySun Dec 02, 2012 12:58 am

Wheel cylinder? Confused. My riv has disc brakes all around. All calipers are new.

Brake lines should be ruled out due to no fluid leak. I traced them too, they look fine.

ABS light has been on for years and has not operated for years.

Should I look at booster vacuum issues? I hear no hissing .
Back to top Go down
98riv
Moderator


Location : USA
Joined : 2007-01-14
Post Count : 981
Merit : 30

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyThu Oct 10, 2013 1:53 pm

I noticed that my brake pedal just about goes to the floor under hard braking. I can't get the ABS to kick on if I wanted to. When the car is off, I can get enough pressure built up so that I can't move the brake pedal but when the car is running I can't get much pressure on the pedal. Could this be the master cylinder?

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
Back to top Go down
robotennis61
Guru
robotennis61

Name : robotennis
Age : 58
Location : las vegas
Joined : 2007-12-17
Post Count : 5561
Merit : 142

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyThu Oct 10, 2013 1:58 pm

98riv wrote:
I noticed that my brake pedal just about goes to the floor under hard braking.  I can't get the ABS to kick on if I wanted to.  When the car is off, I can get enough pressure built up so that I can't move the brake pedal but when the car is running I can't get much pressure on the pedal.  Could this be the master cylinder?
have you completely bleed the system?
Back to top Go down
98riv
Moderator


Location : USA
Joined : 2007-01-14
Post Count : 981
Merit : 30

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyThu Oct 10, 2013 1:59 pm

robotennis61 wrote:


98riv wrote:
I noticed that my brake pedal just about goes to the floor under hard braking.  I can't get the ABS to kick on if I wanted to.  When the car is off, I can get enough pressure built up so that I can't move the brake pedal but when the car is running I can't get much pressure on the pedal.  Could this be the master cylinder?
have you completely bleed the system?
Just changed the fluid and bled it.  The pedal also felt spongy before and after the brake fluid change. I just went out and checked it again and I can get some pressure in the lines if I pump the brake quickly but it will then slowly go to the floor.

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
Back to top Go down
albertj
Guru
albertj

Name :
Location : Finger Lakes of New York State
Joined : 2007-05-31
Post Count : 7446
Merit : 148

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptySun Oct 13, 2013 6:11 am

98riv wrote:

robotennis61 wrote:



98riv wrote:
I noticed that my brake pedal just about goes to the floor under hard braking.  I can't get the ABS to kick on if I wanted to.  When the car is off, I can get enough pressure built up so that I can't move the brake pedal but when the car is running I can't get much pressure on the pedal.  Could this be the master cylinder?
have you completely bleed the system?
Just changed the fluid and bled it.  The pedal also felt spongy before and after the brake fluid change.  I just went out and checked it again and I can get some pressure in the lines if I pump the brake quickly but it will then slowly go to the floor.
Check your brake lines for seepage or outright leaks, replace any damp or rusty lines then replace master cylinder. At your cars age you're probably due.
Back to top Go down
98riv
Moderator


Location : USA
Joined : 2007-01-14
Post Count : 981
Merit : 30

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptySun Oct 13, 2013 1:54 pm

albertj wrote:




98riv wrote:





robotennis61 wrote:







98riv wrote:
I noticed that my brake pedal just about goes to the floor under hard braking.  I can't get the ABS to kick on if I wanted to.  When the car is off, I can get enough pressure built up so that I can't move the brake pedal but when the car is running I can't get much pressure on the pedal.  Could this be the master cylinder?

have you completely bleed the system?

Just changed the fluid and bled it.  The pedal also felt spongy before and after the brake fluid change.  I just went out and checked it again and I can get some pressure in the lines if I pump the brake quickly but it will then slowly go to the floor.

Check your brake lines for seepage or outright leaks, replace any damp or rusty lines then replace master cylinder.  At your cars age you're probably due.

I replaced my master cylinder and bled the lines again.  As an FYI, the AC Delco unit doesn't come with the bleeder kit so make sure to buy one before you start.  Went for a test drive and it still felt like a little air in the lines.  I saw the below YouTube video and gave it a try and it seemed to help get rid of the remaining spongy feeling.  When should the rubber brake hoses be changed out?  Should they be changed every x number of years or miles?  They look fine on the outside, but don't know how they look internally.


_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
Back to top Go down
bmcd9179
Fanatic
bmcd9179

Name : Bryson
Age : 23
Location : Utah
Joined : 2013-09-21
Post Count : 288
Merit : 1

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyWed Dec 25, 2013 1:15 am

Hi guys sorry to butt in but I'm leaking brake fluid, further investigation the brake fluid is coming out of the brake booster line, that's going from the supercharger to the firewall( leak comes from firewall) next to the brake tub thingy.(sorry still learning) what's going on? Cause that cannot be good at all.
Back to top Go down
LARRY70GS
Aficionado
LARRY70GS

Name : Larry
Age : 63
Location : Oakland Gardens, NY
Joined : 2007-01-23
Post Count : 1687
Merit : 111

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyWed Dec 25, 2013 7:43 am

If it is leaking at the back of the master cylinder, it is a seal. Replace the master cylinder.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
Back to top Go down
bmcd9179
Fanatic
bmcd9179

Name : Bryson
Age : 23
Location : Utah
Joined : 2013-09-21
Post Count : 288
Merit : 1

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyWed Dec 25, 2013 2:27 pm

Ok sweet I was hoping it was something minor
Back to top Go down
al_roethlisberger
Junkie
al_roethlisberger

Name : Al Roethlisberger
Age : 51
Location : Sanford, NC
Joined : 2013-03-12
Post Count : 956
Merit : 23

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptySun Apr 27, 2014 10:59 pm

How is the booster rod adjusted on the Riviera?

After replacing the master cylinder and bleeding the system, when the car is very quiet I can hear a slight "tick" when I first press the brake pedal, and I can feel it through the pedal.

I'm relatively certain there is a very small gap between the booster rod and MC, and the "tick" is the rod taking up that tiny bit of slack before pushing on the MC piston.

Some cars have the booster/brake rod adjustment under the dash, others have one screw/unscrew the rod itself with the MC off.

I'm hopeful the rod is adjustable and can be done from inside the car under the dash  wink 

Anyone know if/how the rod is adjusted?

Thanks,
Al
Back to top Go down
deekster_caddy
Master


Name : Derek
Age : 47
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyMon Apr 28, 2014 9:09 am

Be sure the 'tick' you hear isn't just the park safety solenoid. I recall hearing a click when I touch my brake pedal. Further investigation revealed that it was the safety switch that releases the shifter so you can take it out of Park.
Back to top Go down
al_roethlisberger
Junkie
al_roethlisberger

Name : Al Roethlisberger
Age : 51
Location : Sanford, NC
Joined : 2013-03-12
Post Count : 956
Merit : 23

Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 EmptyMon Apr 28, 2014 4:32 pm


Good point. The "click" seems to have cleared itself up as of this morning though.

I'll keep an eye, well an ear and foot, out for it if it comes back or not.
Back to top Go down
Sponsored content




Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty
PostSubject: Re: Write-Up: Brake Master Cylinder - Install & Bench Bleed   Write-Up: Brake Master Cylinder - Install & Bench Bleed - Page 3 Empty

Back to top Go down
 
Write-Up: Brake Master Cylinder - Install & Bench Bleed
Back to top 
Page 2 of 4Go to page : Previous  1, 2, 3, 4  Next
 Similar topics
-
» Can anyone help me about hydrolic brake?
» 4wd brakes
» bleed promax hornet brakes
» Disc brake on transaxle
» Master bedroom for rent(newly renovated & fully furnish)

Permissions in this forum:You cannot reply to topics in this forum
Riviera Performance ::   General Tech :: Brakes & Suspension-
Jump to: