Help I my brakes are srewed after brake job

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Thread: Help I my brakes are srewed after brake job

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    Default Help I my brakes are srewed after brake job

    Let me start by saying I've done many brake jobs but never on a vehicle with ABS brakes. Following another threads suggestion I bled the brakes before compressing the caliper pistons. I used a vacuum bleeder. Now my brakes are installed but I have excessive pedal travel. I've bled the brakes the old fashioned way with pumping several times and I'm getting no improvement in pedal travel. Am I missing something?

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    Default Re: Help I my brakes are srewed after brake job

    You shouldn't have blead the brakes before compressing the calipers. I've never blead the brake system unless there was air in the lines. If you were just replacing pads, there should be NO reason to bleed the system. If you have everything put together with new pads, bleed the system again.
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    Default Re: Help I my brakes are srewed after brake job

    Quote Originally Posted by VC-17 View Post
    You shouldn't have blead the brakes before compressing the calipers. I've never blead the brake system unless there was air in the lines. If you were just replacing pads, there should be NO reason to bleed the system. If you have everything put together with new pads, bleed the system again.
    I agree, I've never dont this before either. But a member on here suggested that with ABS brakes you don't want to send dirty fluid from the calipers back to the control system. It made sense to me.

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    Default Re: Help I my brakes are srewed after brake job

    Quote Originally Posted by VC-17 View Post
    You shouldn't have blead the brakes before compressing the calipers. I've never blead the brake system unless there was air in the lines. If you were just replacing pads, there should be NO reason to bleed the system. If you have everything put together with new pads, bleed the system again.
    You can open the bleeder screws and compress the pistons which will force the old fluid out and not back into the system.
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    Default Re: Help I my brakes are srewed after brake job

    Does anyone have an idea as to why, with repeated bleedings I still have spongy brakes? I took the truck around the block and it is slightly improved but at stops the pedal travels a little to close to the floor for my liking.

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    Default Re: Help I my brakes are srewed after brake job

    You added more brake fluid right????

    Also if you let fluid out to fast you may have let air in at the master cylinder and then down into the line.

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    Default Re: Help I my brakes are srewed after brake job

    hmm did u change out fronts? and rear?
    mine had alot of travel when i changed the fronts...i did the rears today..kinda disappointed that the rear were lower than the fronts! and i have alot less pretravel now

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    Default Re: Help I my brakes are srewed after brake job

    Quote Originally Posted by teallin View Post
    You can open the bleeder screws and compress the pistons which will force the old fluid out and not back into the system.
    Exactly.
    It's not a complete system bleed, it's just allowing the nasty fluid at the caliper to be expelled instead of returned to the reservoir. You will likely need to connect a scantool with ABS capabilities and do a bleed procedure using the scantool. I have also had great results using a pressure bleeder (not a vacuum bleeder) on ABS systems. Keep plenty of fluid in the reservoir at all times.

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    Default Re: Help I my brakes are srewed after brake job

    Thanks for the responses. Answers to questions are. I never bled the system down, just about 30 mls of fluid at each caliper. The resevior never went below the minimum line. I changed both fronts and rears. As one poster suggested, perhaps I bled to quickly and drew air into the lines. Next time I'll just open the bleeder nuts as suggested, I guess I thought that might let air in so I applied vacuum. I didn't know if I may have caused damage to some internal check valves when I applied vacuum. My understanding is that a vacuum bleeder should be fine for ABS brakes, but then the Tundra is a little more complex then just an ABS system. I'll try a couple more bleedings.

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    Default Re: Help I my brakes are srewed after brake job

    Have you actually tried driving it to feel if the brakes 'firm up'? Sitting at a stop, I can push my brake pedal all the way to the floor (as can everyone else with a Tundra).

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    Default Re: Help I my brakes are srewed after brake job

    I work on Ford E-350 and E-450 busses and after any brake work, the pedal feels like crap. The only way to get the pedal back to normal is to accellerate to 20 MPH and then stand on the brake pedal. This will put it into ABS active mode (pump running and wheel solenoids working) to control the stop. After doing this, the pedal always feels like it should. I don't know if this works on Tundra's, but it is something to try.
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    Default Re: Help I my brakes are srewed after brake job

    Quote Originally Posted by RONE View Post
    Have you actually tried driving it to feel if the brakes 'firm up'? Sitting at a stop, I can push my brake pedal all the way to the floor (as can everyone else with a Tundra).
    Yes. I can stop without issue, and as you sugested at a stop can push my brake pedal all the way to the floor. I've seen the threads on this, but never noticed this before my brake job. Perhaps it's always been this way but I don't think so. It seems they at least felt firm.

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    Default Re: Help I my brakes are srewed after brake job

    Quote Originally Posted by gobblerman View Post
    Yes. I can stop without issue, and as you sugested at a stop can push my brake pedal all the way to the floor. I've seen the threads on this, but never noticed this before my brake job. Perhaps it's always been this way but I don't think so. It seems they at least felt firm.
    Thanks I'll give this a try.

    By the way sorry about the thread title. I don't know what I was smoking. Unfortunately it cannot be edited.

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