Need help with brakes, I dont know what I'm doing - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Suspension - Brakes - Steering
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-29-2005, 09:12 PM
Nightfire's Avatar
Young & Idealistic
 
Last wiki edit: How to rebuild an engine
Last journal entry: 1950 Fargo - losing hope
Last photo:
Join Date: Mar 2004
Location: Canada
Age: 26
Posts: 1,192
Wiki Edits: 4

Thanks: 0
Thanked 0 Times in 0 Posts
Need help with brakes, I dont know what I'm doing

So my brothers cars brakes are acting up....a lotta times they dont work at all and if they do only do brake slowly. I checked his master cylinders, it had 2. A big and a small one. The small one was all outta fluid so I filled it up. There is a round piece of rubber floating in it, is this normal? Car is a 90's Toyota Corolla. What could be the problem?





Mike

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-29-2005, 09:16 PM
Member
 
Last photo:
Join Date: Aug 2003
Location: Detroit, MI
Posts: 139
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If your out of fluid you must have a leak. Pump the brakes and look for the leak.

Be carefull with brake fluid it can damage paint!


Bad master or booster ? or something else
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-29-2005, 09:18 PM
30desoto's Avatar
Dodge ain't all bad
 
Last photo:
Join Date: Sep 2003
Location: Eugene OR
Age: 59
Posts: 262
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Nightfire
The master cylinder is bad, you need to either, rebuild or replace it. Then you need to bleed the brake system
Good luck
30dee
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-29-2005, 09:41 PM
Nightfire's Avatar
Young & Idealistic
 
Last wiki edit: How to rebuild an engine
Last journal entry: 1950 Fargo - losing hope
Last photo:
Join Date: Mar 2004
Location: Canada
Age: 26
Posts: 1,192
Wiki Edits: 4

Thanks: 0
Thanked 0 Times in 0 Posts
Allright guys, thanks. I really dont want to do this but I guess I'l have to? Whats the little round rubber floating in the rear master cylinder? Is it a seal? If so, where is the fluid going...? into the booster? And pardon the ignorant question, whats a booster? I never worked on a new car with dual MC's...




Mike
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-30-2005, 10:59 AM
oldschoolrods's Avatar
Member
 

Last journal entry: Engine Compartment
Last photo:
Join Date: Dec 2003
Location: Lancaster, Pennsylvania
Age: 28
Posts: 806
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
nightfire, a booster is that large round thing behind the MC, it uses engine vaccum to give you your power assist, look to see if there is any paint removed from around where the mc bolts to it. i am almost embarrased to type this but when adding power brakes to my ford i forgot to put the seals in the MC and bolted it up and boy did I have a mess of fluid comming out of that area. hope that helps.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-30-2005, 11:19 AM
66GMC's Avatar
Get in, sit down, hang on
 

Last journal entry: Cab Removal
Last photo:
Join Date: May 2005
Location: Olds, Alberta Canada
Age: 57
Posts: 2,763
Wiki Edits: 0

Thanks: 32
Thanked 91 Times in 86 Posts
Quote:
Originally Posted by Nightfire
Allright guys, thanks. I really dont want to do this but I guess I'l have to? Whats the little round rubber floating in the rear master cylinder? Is it a seal? If so, where is the fluid going...? into the booster? And pardon the ignorant question, whats a booster? I never worked on a new car with dual MC's...




Mike
Dual Master Cylinders? or one M/C with dual chambers?

If there are indeed 2 cylinders, then I suspect that one of them (probably the one mounted closest to the LH side) is for a hydraulic clutch. There will be no booster behind a clutch M/C.

Be sure to use the approved fluid (probably DOT-3 brake fluid) ... but check the owner's manual or have someone check a shop manual to verify.

It's really surprising how many cylinders I have come across that people have put ATF, PSF, and even MOTOR OIL in them ... which really screws them up.

What you see floating in the fluid is likely part of the gasket from the cylinder cap ... as I doubt anything very large could be "coming back up".

If this lid gasket is damaged or missing, be sure to replace it, as brake fluid is hygroscopic (absorbs atmospheric moisture).

Last edited by 66GMC; 10-30-2005 at 11:35 AM.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-30-2005, 11:34 AM
66GMC's Avatar
Get in, sit down, hang on
 

Last journal entry: Cab Removal
Last photo:
Join Date: May 2005
Location: Olds, Alberta Canada
Age: 57
Posts: 2,763
Wiki Edits: 0

Thanks: 32
Thanked 91 Times in 86 Posts
Proportioning valve

Thought I might add this too...
(I'm not a mechanic, but this is what I believe to be true...)

You had said something about braking slowly when it does work. If the BRAKE master cylinder is a dual-compartment (has 2 fluid lines coming out of it) that means that it should also have a proportioning valve, usually mounted to the frame at the end of those two fluid lines.

It's possible that this valve may have been "tripped" and needs to be re-set.
When this valve gets "tripped" it diverts all fluid to the side that is able to maintain pressure. There is usually a pin (~= 1/8" dia) that protrudes from a fitting when tripped. Simply push that back in and pump SLOWLY when bleeding the brakes.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-30-2005, 11:48 AM
Chopt 48's Avatar
Registered User
 
Last photo:
Join Date: Oct 2005
Location: Toppenish, washington
Posts: 452
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Fist, I think one of the replies is correct in saying that the floating item was part of a gasket or seal.

If you haven't, take a look at the backside of each wheel/tire to see if one shows to be wet from brake fluid. Check the flex lines to the wheels.
As stated above look at the area behind and below where the cylinder mounts to see if brake fluid has been dripping down there.

Make sure that (ONLY) the proper brake fluid was put in the system. No matter what someone says There are NO substitutes. If anything else was put in the cylinder the system will have to be completely flushed and all cylinders replaced or rebuilt.

Most likely there is a leak somewhere that can be easily repaired, If you don't know anything about brakes I would suggest having a mechanic repair it. Your safety is worth more than the bucks you would save attempting to do it without proper knowledge.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 10-30-2005, 08:13 PM
milner's Avatar
Member
 
Last photo:
Join Date: Feb 2003
Location: ontario canada
Posts: 245
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
the one master cyl that you are referring to is the clutch master, the piece of rubber floating in it is supposed to be there, it is a little rubber cup. this master only holds very little fluid, and the cup floats on top. never put fluid inside the cup. as far as the brake problems, try all the things the guys on hear have suggested. good luck
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 10-30-2005, 09:03 PM
73oldsman's Avatar
Member
 
Last photo:
Join Date: Jun 2004
Location: Northwest Florida
Posts: 1,116
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Me...I like having brakes on my car. Does the brake pedal feel spongy when you apply the brakes, assuming you now have fluid in the master cylinder? Or, sitting in the driveway and you apply the brakes, does the pedal slowly go to the floor? Or, sometimes when your driving, do you put on the brakes only to have it go right to the floor? If so, don't mess around with this. If you don't know what you're doing go to someone who does. A brake job is cheaper than an ambulance ride to the hospital or possibly a lawsuit for hurting someone else! Just my 2 cents...
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 11-01-2005, 06:39 PM
Nightfire's Avatar
Young & Idealistic
 
Last wiki edit: How to rebuild an engine
Last journal entry: 1950 Fargo - losing hope
Last photo:
Join Date: Mar 2004
Location: Canada
Age: 26
Posts: 1,192
Wiki Edits: 4

Thanks: 0
Thanked 0 Times in 0 Posts
Sorry for the late reply. It had 2 different MC's, not one with 2 compartments. One turned out to be the hydraulic clutch MC, thanks 66GMC. We decided to rather have it fixed professionally then attempt it ourselves, so it's now in the brake shop. Thanks for all your help guys, much appreciated



Mike
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 11-01-2005, 07:01 PM
Fast Orange's Avatar
Member
 
Join Date: Apr 2005
Location: Hightstown,NJ
Age: 58
Posts: 174
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Mike-
Smart move takin' it to a pro-sometimes no matter how bad you want to do it yourself,you're better off going to someone who knows what's going on with the problem.Congratulations on a good call.
When you pick it up,ask to see the old parts and what was wrong.That way you'll get a little more knowledge too.

George
Reply With Quote Quick reply to this message

Recent Suspension - Brakes - Steering posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
disk brakes conversion no pressure to back brakes shiner Suspension - Brakes - Steering 10 01-24-2011 12:09 PM
G body with manual brakes - it works! - pics dh79 Suspension - Brakes - Steering 7 08-27-2005 11:55 PM
Brakes locking up in non ABS system nprfan Suspension - Brakes - Steering 9 08-24-2005 01:37 PM
Does the 76 Lincoln Continental come with 9" and disc Brakes Tri5Nerd Transmission - Rearend 8 08-23-2005 12:22 PM
streetrod brakes bigbadchev Suspension - Brakes - Steering 2 03-10-2004 07:02 AM


All times are GMT -6. The time now is 11:41 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.