Master cylinder - low fluid in rear reservoir? - Team Camaro Tech
Team Camaro Tech join team camaro
 
Camaro Parts at SS396.com     
GROUND UP & SS396.com         
Official Sponsor of Team Camaro
   

Auto Insurance



Registered users (free) do not see these large ads

Brakes, Suspension & Steering Conversion questions, Steering & Handling

Reply
 
Thread Tools Display Modes
  #1  
Old Aug 3rd, 12, 06:50 AM
DarrenX33 DarrenX33 is offline
Senior Tech

 
Join Date: Sep 2004
Location: St. Charles, Illinois
Posts: 117
Default Master cylinder - low fluid in rear reservoir?

Having a strange problem with my master cylinder. Recently pulled my 69Z out of storage and found that the brake pedal was going to the floor. I pulled the cap off and found that the rear reservoir was near empty. The funny thing was that when I pulled the cap off a lot of fluid spilled over and out of the front reservoir, almost like the rear fluid was going into the front.

I do see a small drip line down the booster. But when I separate the master from the booster it seems dry so I don't think its coming out the back of the MC when I push the pedal. Wheels cylinders look dry and nothing visible on any of the brake lines running to the rear.

Proportioning valve???
__________________
-Darren
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old Aug 3rd, 12, 07:12 AM
parkbrau's Avatar
parkbrau parkbrau is offline
Senior Tech

John
 
Join Date: Sep 2004
Location: Germany
Posts: 4,888
Default Re: Master cylinder - low fluid in rear reservoir?

I'm just guessing here...But did you have the emergency brake on all the time? If yes, that may have forced fluid from the back reservoir to the front. Sounds like a MC rebuild would not hurt.
__________________
John, 69 Base Coupe, Rallye Green
69 L78 Rallye Green Nova
Remember, Its not WWIII until France surrenders!
Reply With Quote Quick reply to this message
  #3  
Old Aug 3rd, 12, 08:12 AM
DarrenX33 DarrenX33 is offline
Senior Tech

 
Join Date: Sep 2004
Location: St. Charles, Illinois
Posts: 117
Default Re: Master cylinder - low fluid in rear reservoir?

I topped it off and drove it around town and it proceeded to empty again.

When I restored my car in the early 90's I sent the master out to be re-sleeved. I wasn't thinking I needed it again. But maybe?
__________________
-Darren

Last edited by DarrenX33; Aug 3rd, 12 at 08:27 AM.
Reply With Quote Quick reply to this message
  #4  
Old Aug 3rd, 12, 09:29 AM
parkbrau's Avatar
parkbrau parkbrau is offline
Senior Tech

John
 
Join Date: Sep 2004
Location: Germany
Posts: 4,888
Default Re: Master cylinder - low fluid in rear reservoir?

Then you have to be able to see where the fluid is dripping or leaking from if its that noticeable.
__________________
John, 69 Base Coupe, Rallye Green
69 L78 Rallye Green Nova
Remember, Its not WWIII until France surrenders!
Reply With Quote Quick reply to this message
  #5  
Old Aug 3rd, 12, 11:48 AM
DarrenX33 DarrenX33 is offline
Senior Tech

 
Join Date: Sep 2004
Location: St. Charles, Illinois
Posts: 117
Default Re: Master cylinder - low fluid in rear reservoir?

Quote:
Originally Posted by parkbrau View Post
Then you have to be able to see where the fluid is dripping or leaking from if its that noticeable.
I agree. One would think but nada.
__________________
-Darren
Reply With Quote Quick reply to this message
  #6  
Old Aug 3rd, 12, 12:10 PM
Vintage 68's Avatar
Vintage 68 Vintage 68 is offline
Gold Lifetime Member

John
 
Join Date: Mar 2002
Location: Moraga,Ca.,USA
Posts: 13,346
Wink Re: Master cylinder - low fluid in rear reservoir?

If the fluid is transferring from the 'rear' reservoir to the 'front' - then the problem is internal to the Master cylinder
The secondary cup seal(s) have been damaged or failed ...

Rebuild/replace the master.
__________________
1968 Convertible
Some trucks
Other V8 things - some of which float
Other V6 things - none of which float
Oh yeah, and 1 "Straight-Six" ...

If a man says something in the garage - and his wife can't hear him - is he still wrong !!!
Reply With Quote Quick reply to this message
  #7  
Old Aug 3rd, 12, 03:27 PM
Steptoe Steptoe is offline
Senior Tech

Steps
 
Join Date: Dec 2005
Location: New Zealand
Posts: 12,959
Default Re: Master cylinder - low fluid in rear reservoir?

How long has the car been sitting... storage is bad on brake seals...MC and wheels.
Have seepage marks down the booster but no signs behind the MC seals....
Check inside the booster for fliud... it may need emting of brake fliud.

Is there air when u bleed the brakes?
Does sound like what John above describes.. replace rebuil MC, and caution with calipar and slave seals... storage, plus extra pressure from a new MC usually blows those over the next couple 1000 miles to.
Reply With Quote Quick reply to this message
  #8  
Old Aug 3rd, 12, 09:28 PM
DarrenX33 DarrenX33 is offline
Senior Tech

 
Join Date: Sep 2004
Location: St. Charles, Illinois
Posts: 117
Default Re: Master cylinder - low fluid in rear reservoir?

Hardcore storage since last November. It's usually out by april but I needed it in 3 mos longer than usual. I'll check into those things.
__________________
-Darren
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply
Team Camaro Tech > First Generation Camaro Info and Tech - 1967- 1969 "Where it all started" > Brakes, Suspension & Steering      Current Topic: Master cylinder - low fluid in rear reservoir?
Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user 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.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

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.



Thread Tools
Display Modes

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

Forum Jump


All times are GMT -7. The time now is 09:11 AM.



Camaros.net - 2009 AutoForums.com