• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Leaky brake fluid resevoir

DimitriT

DimitriT

Forum Sage
Past Site Supporter
This is an 82 GS550L which has the rectangular front resevoir. I noticed that it leaks fluid.

Is it a simple replacement of the gasket (with the expanding rubber bladder) or should I rebuild the master cylinder.

Is it normal for some fluid to squirt our from the master (back into the resevoir) when I squeeze the lever?

The front brake seems to work ok. Probably needs a new hose.
 
You may need a new cover They warp sometime & then will not seal.
A bubble when moving the lever is normal
 
Re: Leaky brake fluid resevoir

DimitriT said:
This is an 82 GS550L which has the rectangular front resevoir. I noticed that it leaks fluid.

Is it a simple replacement of the gasket (with the expanding rubber bladder) or should I rebuild the master cylinder.

Is it normal for some fluid to squirt our from the master (back into the resevoir) when I squeeze the lever?

The front brake seems to work ok. Probably needs a new hose.
Click to expand...

Hey, I have a brand new rectangular resevoir with the cap, rubber and o-ring. I haven't had it a month. Check your PM.
Fwiw, I changed out the master cyl to the older round type 'cause the piston was leaking on mine. I thought it was the resevoir too but...Nope.
 
So I made a gasket for it out of some cork/rubber material. I cut it out using an x-acto knife and the results were pretty good. I also went back and read some old posts on bleeding the brakes. This time I tried compressing the caliper using an big C-clamp. Sure enough a bunch of bubbly brake fluid came out when I released the bleed nozzle. I bled out about a resevior's full of fluid and then release the clamp and pumped the master cylinder until I had pressure back through the system. The results are good: less drag on the wheel and the springiness in the lever is gone. Action now is smoother with a little more travel in the lever. The resevior leak is also fixed.

BTW, I was worried the brake fluid would eat this gasket material. So I experimented by cutting a piece and putting it in a small pyrex dish with some fluid. I then let it sit in a warm place for a couple of nights. No visible change in either the fluid or the material but I plan on opening up the resevior in a few months to check on it. This is the same stuff I used to fix my leaky gas cap.
 
Just make sure the cork is cut really clean. It doesn't take much to clog the tiny return feed into the resevoir.
 
You must log in or register to reply here.
Back
Top