Question about 2003 Kia Rio

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I MISSED BRAKE OIL IN MY KIA I FILLED IT UP BUT SOMETIMES I HAVE BRAKES AND THE REST OF THE TIME I HAVE TO PUSH REALLY FAR ON THE BRAKE PEDAL

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  • Kia Master
  • 8,215 Answers

Hi, it is likely you have a leak in your system. Check under the car, especially at the wheels, for a leak. Also check behind the master cylinder, where you filled up the reservoir. Once the reservoir ran dry, you probably got some air in the system, which is now allowing too much pedal travel. You will need to repair the leak and bleed the system to restore your brakes. Once you find the leak, please get back to me with the problem, and I can provide repair instructions, if desired.
Thanks for using FixYa.

Posted on Mar 30, 2011

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  • 3 more comments 
  • ddenis932 Mar 31, 2011

    i have found the leak

  • Jeff Turcotte
    Jeff Turcotte Mar 31, 2011

    OK, where is the leak?

  • Jeff Turcotte
    Jeff Turcotte Mar 31, 2011

    Would you like advice on how to fix it?

  • ddenis932 Mar 31, 2011

    near the container we put the brake oil in but how do i get the air out of the brakes

  • Jeff Turcotte
    Jeff Turcotte Mar 31, 2011

    OK, if it's coming out the back of the master cylinder you will need a new one. You can bleed the brakes now to restore pedal pressure, but the are will not be real safe until you replace the master cylinder. I have pasted the bleeding instructions below. If your steering wheel is on the right, reverse the sequence in the front. Always bleed from the furthest wheel and end with the closest wheel to the brake master cylinder.

    To replace the master cylinder, first purchase the new one (or a rebuilt one) and bench bleed it by filling the reservoir and pumping the plunger with a large phillips screwdriver until no air comes up inside. The cylinder usually comes with plastic blleding lines you can guide into a full bottle of brake fluid. Once the master cylinder has no air in it, remove the bleeding lines and cap the ports with the plugs it had. Next, loosen the hydraulic lines of the old master cylinder. Use a line wrench if you have one, otherwise use an open end wrench. Do not use vice grips and do not strip the fittings. If the wrench slips, obtain a line wrench to loosen the fittings without stripping them. Next remove the 2 nuts holding the master cylinder to the booster. Then, remove the hydraulic lines and quickly swap the new for the old cylinders. Remove the caps from the ports and quickly screw the hydraulic fittings into the ports. Replace the nuts and tighten the master cylinder in place. tighten the hydraulic fittings just snug. Have an assistant pump the brake pedal and then hold it down while you briefly loosen and then retighten each hydraulic fitting. If either fitting releases air while loosening, repeat the process until no air is released. Tighten both fittings firmly and check the pedal for pressure. If the pedal is not firm, perform the full system bleed procedure pasted below. Please let me know if you have any questions, and thanks for using FixYa.




    WARNING

    When bleeding the brakes, note the following:


    Do not reuse the drained fluid

    Always use Genuine DOT 3 or DOT 4 Brake Fluid. Using a non-Genuine DOT3 or DOT 4 brake fluid can cause corrosion and decrease the life of the system

    Make sure no dirt of other foreign matter is allowed to contaminate the brake fluid

    Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water

    The reservoir on the master cylinder must be at the MAX (upper) level mark at the start of bleeding procedure and checked after bleeding each brake caliper. Add fluid as required



    1. Make sure the brake fluid level in the master cylinder fluid reservoir is a the MAX (upper) level line.

    2. Have someone slowly pump the brake pedal several times, and then apply steady pressure.

    3. Loosen the right-rear brake bleed screw to allow air to escape from the system. Then tighten the bleed screw securely before telling the assistant to let up on the pedal.

    4. Repeat the procedure for each wheel in the sequence shown below until air bubbles no longer appear in the fluid.

    5. Refill the master cylinder reservoir to the MAX (upper) level line.




      Fig. Brake bleeding sequence

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