Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13

Thread: another ae86 brake question

  1. #1
    Veteran Rice86's Avatar
    Join Date
    Jan 2009
    Name
    Richard
    State
    NSW
    Location
    Liverpool
    Country
    Australia
    Posts
    1,853

    Default another ae86 brake question

    AE86

    JDM slotted rotors with JDM calipers, QFM A1RM pads
    JDM T rear end, JDM slotted rotors, QFM A1RM pads

    SO the brakes work but just wanting to know if there is anything i can do to stop the brake pedal feeling all spongy.

    When everything was brand new and just installed, it felt great but as time went by and driving this thing everyday, it has worn down the "new" feel of everything and is now feeling more like a soft-cock

    i like my pedal feel to be solid, so what can i do if anything with this?

    i have bleed the brakes already and it was good but shortly back to soft.
    dose

  2. #2
    Senior Member AIROCOBRA's Avatar
    Join Date
    Apr 2009
    Name
    Bob
    State
    ACT
    Location
    Weston
    Country
    Australia
    Posts
    343

    Default

    I had a similar problem a year ago . Turned out to be the brake booster ( leaking seal ) Had it rebuilt and good pedal again . Same can apply for a internal leak in the master cylinder .
    ONLY THE GOOD DIE YOUNG ------ I MUST BE VERY VERY VERY BAD

    AE86 4AGE 16V N/A TRACK CAR ( RED )
    AE86 ROLLING SHELL --- IN CASE i F-CK UP !!!!!! (PRIMER )
    AE86 ADM UNDER CONSTRUCTION ( STREET CAR) 4AGE 16V , (RED )
    AE86 Trueno ( RESTORE TO PERIOD GOODNESS ) White
    AE86 4AGZE Wreck ( to be rebuilt into Khannacross fun car )
    KE 15 x 2 -- SPRINTER ( RESTORE TO PERIOD GOODNESS ) RED
    TE72 (T18) X 2 BIT OF PAINT , BIT OF MECHANICAL way we go RED
    Soarer 1995 1JZ Factory 5speed (R154 )

  3. #3
    Veteran
    Join Date
    Aug 2009
    Name
    Jake
    State
    QLD
    Location
    Northgate
    Country
    Australia
    Posts
    1,595

    Default

    I would put a new master cylinder in. I would think if it was the brake booster it would be the opposite, would be a harder pedal?
    "Not all commodore drivers are wankers, but all wankers drive commodores"

  4. #4
    Veteran timbo's Avatar
    Join Date
    Aug 2009
    Name
    Tim?
    State
    QLD
    Location
    Wild West
    Country
    Australia
    Posts
    2,145

    Default

    Good setup, I run the exact same in my car, awesome! Wouldn't you bleed your brakes first? Maybe check none of the calipers are leaking etc. Sorry if you have already done this.

  5. #5
    Veteran
    Join Date
    Jan 2009
    Name
    Adan
    State
    NSW
    Location
    Oxley Park
    Country
    Australia
    Posts
    1,082

    Default

    How spongy is it? Like it needs to be bled again? Or just like the brakes are a bit hot?

    As said, the master cylinder can leak internally.

  6. #6
    Veteran Rice86's Avatar
    Join Date
    Jan 2009
    Name
    Richard
    State
    NSW
    Location
    Liverpool
    Country
    Australia
    Posts
    1,853

    Default

    i was hoping i wouldn't need a new/newer/rebuild booster or master.

    Thanks for the replies i guess i'll just slowly shop around for a better upgrade to be had
    dose

  7. #7
    Senior Member dansomerville's Avatar
    Join Date
    Jun 2011
    Name
    Daniel
    State
    QLD
    Location
    Townsville
    Country
    Australia
    Posts
    246

    Default

    I've got a similar problem, exact same setup, bar maybe braided brake lines. I can't get rid of my spongy pedal. Car stops well, just shitty pedal feel.

    I've rebuilt my calipers, new rotors, pads bled them plenty of times. I always assumed it was my masters fault because it visibly leaky at the rear seal.

    Recently while the engine was out i got it resleeved and sealed, and pulled the booster apart to check the seals, bled them quickly yesterday, it is a lot better and I know there's still air in there as it was a just a dodgy job to get it rolling again. Hopefully after a vacuum bleed It will be all good.

  8. #8
    Veteran
    Join Date
    Aug 2009
    Name
    Jake
    State
    QLD
    Location
    Northgate
    Country
    Australia
    Posts
    1,595

    Default

    For the price of a new master cylinder why would you not just replace it.
    "Not all commodore drivers are wankers, but all wankers drive commodores"

  9. #9
    Senior Member dansomerville's Avatar
    Join Date
    Jun 2011
    Name
    Daniel
    State
    QLD
    Location
    Townsville
    Country
    Australia
    Posts
    246

    Default

    ADM and JDM masters have different mounts, I would have to find a ADM booster to buy a local master.

    And good luck finding a new JDM master for sale. Maybe through Toyota but the wait would have been ridiculous.

  10. #10
    Veteran Rice86's Avatar
    Join Date
    Jan 2009
    Name
    Richard
    State
    NSW
    Location
    Liverpool
    Country
    Australia
    Posts
    1,853

    Default

    yup so have to look at other alternative such as nissan stuff like what others are already using here and there
    dose

Page 1 of 2 1 2 LastLast

Similar Threads

  1. Brake Master cylinder question
    By luke20 in forum Technical - Questions
    Replies: 2
    Last Post: 29th October 2012, 10:58 AM
  2. Quick sr20det brake question!
    By what-psi in forum General Topics (No Technical Questions)
    Replies: 3
    Last Post: 4th June 2009, 12:23 PM
  3. brake master cylinder question?
    By shinny in forum Technical - Questions
    Replies: 7
    Last Post: 13th October 2007, 02:15 PM
  4. FC brake conversion question
    By ae86 drifter in forum Technical - Questions
    Replies: 2
    Last Post: 5th April 2007, 01:25 PM
  5. brake booster question
    By Akury in forum Technical - Questions
    Replies: 2
    Last Post: 31st March 2007, 09:28 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •