Jump to content
SAU Community

What's wrong with my brakes...

Remix-

By Remix-,
in General Automotive Discussion

 Share

Recommended Posts

Remix- Mentor

Remix-

Posted
Posted

After a few hard brakes and some spirited driving in the gtst, i was cruising down a street and went to hit the brakes and there was nothing there!! The pedal went all the way to the floor, i pumped them then it sort of came back then there was nothing. I left the car at home then the next day went for a drive and everything is perfect again? Though i am feeling very uneasy about braking atm after what happened. Any ideas would be greatly appreciated!

Some of my thoughts:

Brake master cylinder is on the way out?

Brake fluid is crap?

Brakes need to be bled?

Link to comment
https://www.sau.com.au/forums/topic/51141-whats-wrong-with-my-brakes/
Share on other sites
Jae_s15 Rookie

Jae_s15

Posted
Posted

I would guess that you more than likely need the brakes bled and get new fluid. Sounds like you current brake fluid has absorbed a fair bit of water and is boiling really easily, as the spongy pedal is the main symptom of overheating fluid. Don't know what you currently use, but it might be worth upgrading to something like a DOT 5.1 fluid or something along those lines.

If that doesn't fix it, then have a better look at other possible problems.

Cheers,

Jae.

slipperywhenboosting Contributor

slipperywhenboosting

Posted
Posted

If you have cheap brake pads on it and you were driving hard you may have heated the pads up past their working temperature causing them to lose there resistance which would explain why they worked fine afterwards,(they cooled down) this happens a lot when the pads are low aswell, i dont think it would be the master cyclinder, check for leaks anywhere on the brake line or the master cylinder though.

benm Grand Master

benm

Posted
Posted
Thanks mate, i will bleed the brakes the following weekend and change the fluid.
My suggestion would be to take it to the best brake mechanic in your area and explain what happened. You are best off getting new brake fluid (which involves getting them bled). I spent ~9mths with a very bad brake pedal and driving was no fun. It cost well over $2,500 in total, I got everything fixed/upgraded because the feeling of having no brakes is the worst and I was happy to spend money to ensure it doesn't happen again.

Once your fluid has boiled, replace it.

I boiled/cooked my brakes so badly after literally 2x 10 lap sessions (very average speed laps too) at Eastern Creek that it destroyed my brake system. Pedal went to the floor, pumping it did nothing, had to limp home and it basically spent the next week at a workshop and took more than 5 mechanics and ~9mths of mucking around to get the problem solved.

Good quality DOT5.1 will cost about $100 and an hour of their time. Depending on how much damage you have done you may also require new brake pads which could be around $200 all up.

It's fun hitting boost and watching that speedo increase rapidly, it's not fun watching the car infront get closer and closer with your foot already firmly on the pedal.

riggaP Veteran

riggaP

Posted
Posted

Sounds like you cooked the brakes. Better pads and fluid should fix it.

The same thing happened in my previous car, which was caused by a faulty handbrake. The master cylinder followed soon after :) It had a similar feeling under the pedal but a lot more expensive to fix.

SLIM V 2.1.0 Enthusiast

SLIM V 2.1.0

Posted
Posted
After a few hard brakes and some spirited driving in the gtst, i was cruising down a street and went to hit the brakes and there was nothing there!! The pedal went all the way to the floor, i pumped them then it sort of came back then there was nothing. I left the car at home then the next day went for a drive and everything is perfect again? Though i am feeling very uneasy about braking atm after what happened. Any ideas would be greatly appreciated!

Some of my thoughts:

Brake master cylinder is on the way out?

Brake fluid is crap?

Brakes need to be bled?

I reckon you should take another driving test?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Marek
      Hi everyone.

      By Marek · Posted

      Haha, i kow right? Could have bought so many cars for the same amount of money (or less) but driving Unicorn gives you at least +1mln to style 😅. Like wise man said "life's to short to drink cheap wine and drive boring cars" 😉
    • ARB26
      S1 Autech 260RS Wiring Diagrams

      By ARB26 · Posted

      Newbie here, proud owner of an Autech 260RS. I'm on the hunt for wiring diagrams specific to the 260RS, particularly S1. I've ran my eyes through R33, R34 Diagrams, there are some similarities, however continue to find incorrect wire colours and pins on connectors in the 33,34 diagrams.   I was hoping someone could point me in the right direction? I'd be happy to pay for the originals in Japanese. I can translate them, at least they would be accurate.   Any help please would be greatly appreciated, never heard an RB26DETT before let alone driven one, and I've got a spaghetti monster of goodness to sort out.   Cheers Benny  
    • DanMac34
      R34 Speedo not working after manual swap

      By DanMac34 · Posted

      Hey all  im wondering if you can help me please I have put a rb20 box in my r34 gtt as my auto packed up and a friend had a spare box I know it’s not ideal but it will get me up and running for now. we have done the conversation and everything is working great but my Speedo we got a s13 speed sensor but my Speedo reads double now and I bought a speed converter but still not having any luck.  so I thought I’ll reach out and pick your brains  any help would be appreciated please as I wanna drive my car again 
    • joshuaho96
      Speed Sensor replacement

      By joshuaho96 · Posted

      Drain it. I got official Matic D but you can get whatever is listed as Matic D compatible.
    • QB6SAGR
      Tein Circuit Master- rebuild worth it?

      By QB6SAGR · Posted

      Thanks guys,  Yeah I should at least have them dynoed, at least then I know what I've got as a starting point.  The springs on these are hard as rocks. I vaguely remember Russman saying he was going to sell the shocks to me with the rocks fitted, as he was keeping the softer springs for his new setup.  I didn't click at the time but of course that was to let me know the shock/spring wouldn't be matched.  I also remember pricing up new springs around 2014-15, but, house, money etc. it never happened. So that was another reason to have them rebuilt. I have rebuilt the forks on many motorcycles so I think I could handle the seals on these easily enough, but getting the valving right would be a rabbit hole I cbf exploring.  Duncan, interesting to hear RP was tuning these back then. I might give them a call.  In the mean time I have been busy fitting sway bars. The Whiteline rear sway bar I purchased 15 years ago finally got fitted, along with the Whiteline front bar that showed up last week. Just waiting on new links for the front sway bar to finish that off.  And my spare set of advan AVS VS5's should be back from the powder coaters in a Pearl White finish sometime this week, with a set of Hankook RS4's lined up for fitting.  And then I just have all the suspension bushes to do. A comprehensive kit is on the way... Lots to do before the Ararat hill climb. Cheers guys 🍻   
×
×
  • Create New...