trucking45 Posted January 26, 2012 Share Posted January 26, 2012 my 81 brat just went through some brake fluid and after checking all four corners and doing a run though on the brake lines i could not find a noticeable leak and when i filled the reserve i got my brakes back no prob yet im scared to take it on the road...i'm gonna bleed the brakes just to be safe but any ideas as to wth is going on?:confused::-\:-\ Link to comment Share on other sites More sharing options...
zukiru Posted January 26, 2012 Share Posted January 26, 2012 check for a master cylinder leak. would be under the resevoir on either side of the fire wall. so under the rezzy and under the pedal. Link to comment Share on other sites More sharing options...
trucking45 Posted January 26, 2012 Author Share Posted January 26, 2012 Alright thanks Link to comment Share on other sites More sharing options...
aba4430 Posted January 26, 2012 Share Posted January 26, 2012 my 81 brat just went through some brake fluid and after checking all four corners and doing a run though on the brake lines i could not find a noticeable leak and when i filled the reserve i got my brakes back no prob yet im scared to take it on the road...i'm gonna bleed the brakes just to be safe but any ideas as to wth is going on?:confused::-\:-\ What do you mean by you could not find a noticeable leak? Any brake fluid leak is a problem! Have you removed the drums (assuming you have stock brakes in the rear) and verified no leaking wheel cylinders and no wetness within? Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted January 26, 2012 Share Posted January 26, 2012 my 81 brat just went through some brake fluid and after checking all four corners and doing a run though on the brake lines i could not find a noticeable leak and when i filled the reserve i got my brakes back no prob... Remember: An Old Brake fluid with enough Humidity, could evaporate easily if you use your brakes very much, in example: when you Drive a lot Downhill while using the brakes all the time, instead the gearbox to keep the speed. Kind Regards. Link to comment Share on other sites More sharing options...
trucking45 Posted January 26, 2012 Author Share Posted January 26, 2012 What do you mean by you could not find a noticeable leak? Any brake fluid leak is a problem! Have you removed the drums (assuming you have stock brakes in the rear) and verified no leaking wheel cylinders and no wetness within? Meaning i didnt find it dripping anywhere..and i have disc on all four corners...and loyal when i stop for a light or anything i use the engine to slow me down as much as possible Link to comment Share on other sites More sharing options...
aba4430 Posted January 27, 2012 Share Posted January 27, 2012 If you not see concrete evidence of leaks, then there should not be a problem. Perhaps the fluid levels were not checked frequently enough and you noted low brake fluid one day. As your brakes wear out, the fluid level in the reservoir will go down. Not sure if this is the case here. If it was totally empty when you noticed this and filled it back up, you should bleed the system. Did the warning lamp alert you to the brake problem? Link to comment Share on other sites More sharing options...
trucking45 Posted January 27, 2012 Author Share Posted January 27, 2012 Well it was about a month month and a half since i last checked em..and what made me notice it was when i was backing out of the drive way my foot went t the floor before my brakes did anything Link to comment Share on other sites More sharing options...
pksjeep Posted January 29, 2012 Share Posted January 29, 2012 I would look around the master cylinder. You could also be possibly be pulling the fluid thru the break booster and burning it. Link to comment Share on other sites More sharing options...
79ratbrat Posted May 24, 2012 Share Posted May 24, 2012 im having a problem on my gen 1 79 brat ive bled the brakes 4 time and all air is out and doesnt lose any fluid and no leaks but still have to pump brakes 2 or 3 times to get solid pressure only thing i havnt done is checked pads but doesnt make sense to me:banghead: if the pads were bad then why does it get good pressure and stop on a dime after acouple pumps ? please help! Link to comment Share on other sites More sharing options...
naru Posted May 24, 2012 Share Posted May 24, 2012 master cylinder Link to comment Share on other sites More sharing options...
Storydude1 Posted May 24, 2012 Share Posted May 24, 2012 master cylinder Yep. No visible leaks=MC is bad. You usually can see the paint bubbling on the booster if it's been leaking for a while. When you replace it, MAKE SURE to read the instructions for bench bleeding it BEFORE you install it. Every maker has a different procedure to bench bleed. AND when bench bleeding, DO NOT bottom the master cyl. plunger out. you WILL tear seals and be replacing it shortly if you do. Link to comment Share on other sites More sharing options...
79ratbrat Posted May 29, 2012 Share Posted May 29, 2012 it holds pressure tho and doesnt lose any fluid at all? Link to comment Share on other sites More sharing options...
naru Posted May 30, 2012 Share Posted May 30, 2012 Internal leak. Link to comment Share on other sites More sharing options...
79ratbrat Posted May 31, 2012 Share Posted May 31, 2012 what do u mean internal leak like in the booster? and mine builds pressure after a few pumps like they need to be bled but i have already ? Link to comment Share on other sites More sharing options...
Storydude1 Posted May 31, 2012 Share Posted May 31, 2012 Internal leak in the MC. It can build pressure but not build pressure from a single press. No leaks+Bled+crappy pedal=blown MC, or MC is on it's way out. Link to comment Share on other sites More sharing options...
naru Posted May 31, 2012 Share Posted May 31, 2012 http://www.britishv8.org/Articles/Tandem-Master-Cylinders.htm Cup on piston #2 is leaking. No leak into the booster. No external leak. Pretty common. Link to comment Share on other sites More sharing options...
79ratbrat Posted June 4, 2012 Share Posted June 4, 2012 cool thanks for the help Link to comment Share on other sites More sharing options...
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