Brake Bleeding Methodology

Discussion in 'General Motoring' started by melbourne, Oct 20, 2003.

  1. melbourne

    melbourne Guest

    Vehicle - 1994 Civic

    Is there a specific order one should follow to correctly bleed brakes?

    Is the following order correct for a '94 Civic:

    1) Rear Drivers Side
    2) Front Drivers Side
    3) Rear Passenger Side
    4) Front Passenger Side

    Or should you bleed the rear brakes first and then the front brakes?

    Any assistance is greatly appreciated.
    melbourne, Oct 20, 2003
  2. melbourne

    Tegger® Guest

    The system is dual-diagonal, so your sequence is correct. If you have ABS,
    you'll have to bleed the power unit separately.
    Tegger®, Oct 20, 2003
  3. melbourne

    Rod Guest

    Normally you start witht he wheel furthest from the master cylinder and work
    in from there. So it would be:

    1) Rear Passenger Side
    2) Rear Drivers Side
    3) Front Passenger Side
    4) Front Drivers Side
    Rod, Oct 20, 2003
  4. melbourne

    dimmi Guest

    RR R
    FR L
    RR L
    FR R
    is the correct order for 5 gen Civic
    dimmi, Oct 20, 2003
  5. melbourne

    dimmi Guest

    As per shop service manual...

    dimmi, Oct 20, 2003
  6. melbourne

    melbourne Guest


    Do you mean,

    Rear Drivers Side
    Front Passenger Side
    Rear Passenger Side
    Front Drivers Side

    Is this what you are saying or is it something else?
    melbourne, Oct 20, 2003
  7. melbourne

    Tegger® Guest

    OK, your sequence is NOT correct, despite my reply earlier. I did not look
    carefully enough at your sequence. Dimmi's is correct.

    His acronyms mean:
    ReaR Right
    FRont Left
    ReaR Left
    FRont Right.

    This is the correct procedure for dual-diagonal.

    Dual front/rear split (as on most Toyotas) would involve:
    RR R
    RR L
    FR R
    FR L
    Tegger®, Oct 20, 2003
  8. melbourne

    dimmi Guest

    RR to me always meant ReaR
    FR - FRont (sometimes they screw it and FR means front right, but nevermind
    R - RIGHT
    L- LEFT

    I encoded the sequence in this manner so that it doesn't matter whether your
    car has steering wheel on the right or left side.
    It is pretty dangerous to refer "driver's" or "passenger's" 'cause you never
    know what country the other poster is from, how freaky his vehicle is, etc.
    ....and of course I assumed you are from Australia, therefore I did not use
    your terminology, instead I used something more common to eliminate
    intercontinental misunderstanding (RR, FR, R, L). Did not work though...

    Thanks to Tegger for decoding! Good job ;-)))
    dimmi, Oct 20, 2003
  9. melbourne

    melbourne Guest

    Thanks dimmi,

    So regardless if your Civic 1994 (non ABS) is a left hand drive or right
    hand drive, the correct order to bleed your brakes is:

    1) Rear Right
    2) Front Left
    3) Rear Left
    4) Front Right
    melbourne, Oct 21, 2003
  10. melbourne

    dimmi Guest

    this is supper-dupper correct and you are welcome ;-)))
    dimmi, Oct 21, 2003
  11. melbourne

    Gus Guest

    If the steering wheel is reversed, i.e., RHD instead of LDH, wouldn't
    the bleeding procedure be reversed also?
    Gus, Oct 21, 2003
  12. melbourne

    dimmi Guest

    No, it will stay the same, given that all brake system (routing of the brake
    lines)is the same. Which I am almost 99% sure - it wouldn't make sense for
    Honda to make 2 or 3 or more sets of the brake lines depending on what
    country this model is going to be sold at.
    Correct me if I am wrong.
    Where is the brake booster on RHD Hondas? If look at the front of the
    vehicle, is it on your right, same side where the timing belt is?
    dimmi, Oct 21, 2003
  13. melbourne

    melbourne Guest

    Looking from the front of a RHD Honda Civic, the brake booster is located on
    the left hand side. The timing belt is located on the right hand side of
    the motor.
    melbourne, Oct 22, 2003
  14. melbourne

    Gus Guest

    I was thinking that this would be different, making the bleeding
    procedure different (probably reversed).
    If a manufacturer moves the steering wheel to the opposite side, I think
    a lot of things would change. Parts vary by country to meet emission &
    noise regs. OTOH, I can certainly understand wanting to minimize the no.
    of parts that have to be inventoried.
    Gus, Oct 22, 2003
  15. melbourne

    Tegger® Guest

    What I always found funny was how even though the driving position can be
    on either side of the car, the pedals are always exactly the same
    regardless of where the driver sits.

    Therefore, in a LHD car, the gas is up against the transmission tunnel. In
    a RHD car, it's up against the driver's door, still operated by the right
    foot. Freaky, huh?
    Tegger®, Oct 22, 2003
  16. melbourne

    dimmi Guest

    After melbourne wrote that his Booster is on the left hand side I tought
    Whoa, that might mess everything up.
    I went to online Honda UK service manuals at

    British models have absolutely the same bleeding sequence to my greatest
    RR R
    FR L
    RR L
    FR R

    It is still unknown how brake lines (eg their length) is different between
    RHD and LHD Hondas.

    dimmi, Oct 22, 2003
  17. melbourne

    Tegger® Guest

    Chances are the lines are identical after the proportioning valve, which is
    likely in the same place for both versions.
    Tegger®, Oct 22, 2003
  18. melbourne

    E. Meyer Guest

    The brake booster is always directly behind the brake pedal.

    The bleeding order has more to do with which circuit is connected to the
    front of the master cylinder and which is connected to the rear or it. So
    it really would not be a big deal to swap the circuits. The two connections
    are only about 3 inches apart at the master cylinder. In any event you
    would still be bleeding a rear followed by the opposite front, then the
    other rear followed by the opposite front.
    E. Meyer, Oct 22, 2003
  19. melbourne

    Gus Guest

    Hmm, yes. I guess they assume (or determined) that drivers can more
    easily learn to shift with their opposite hands (thinking manual trans
    here) than step on the gas with their opposite foot. Be interesting to
    hear from some automotive engineers on this.
    Gus, Oct 22, 2003
  20. melbourne

    dimmi Guest

    well, maybe it is just a matter of changing lines that go to the pressure
    dimmi, Oct 24, 2003
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