Question about 2004 Saturn VUE

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After replacing drive side caliper, both front disk brakes, and rear drum brakes, bleed all three lines, both my front calipers lock grinding my front brakes. I am going to re-bleed my lines tomorrow but what else could it be?

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  • kluczak Oct 04, 2009

    rbarton,

    Thanks for the quick reply. Yes, rear shoes on the drums.

    No, they are grinding and produced smoke (caliper did not retract enough on both sides). No grease on the brake shoes when reinstalled.

    I am going to test the front hoses to see if that is the proplem where it isn't releasing the pressure from the lines as the brake peddle become very "hard" when the brakes heat up.

  • kluczak Oct 04, 2009

    rbarton,

    Thanks for the quick reply. Yes, rear shoes on the drums.

    No, they are grinding and produced smoke (caliper did not retract enough on both sides). No grease on the brake shoes when reinstalled.

    I am going to test the front hoses to see if that is the proplem where it isn't releasing the pressure from the lines as the brake peddle become very "hard" when the brakes heat up.

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I assume you mean that you replaced the front pads and rear shoes. Or did you also replace the disks and drums?? Either way you should be ok unless you also replaced the slave cylinders on the rears.
The fluid flows back up to the Master Cylinder as you squeeze the calipers and the slaves to fit the new parts in. Some people pre-fill the caliper to reduce the amount of air and make bleeding easier.Now .....Grinding better be a wrong choice of words. Possibly you spilled fluid on the pads while bleeding the lines. This will cause a binding and shuddering when you apply brake pressure. This will also make you think the lines are not bled properly because of the increased pedal pressure you are putting on the wet/lubricated front pads. If so, replace the pads. Don't try washing them with aerosol cleaner cause it takes more time and money than simply changing them.

Posted on Oct 04, 2009

  • rbarton433 Oct 04, 2009

    OK,
    1> The only way anything is grinding is if you put the old pads back in.
    2> Smoke would also indicate that brake fluid spilled on to the pads. Or is leaking from a damaged caliper.
    The design of disk brakes is that the pad rides touching the disk. The puck in the caliper only applies pressure to the pad. (there isn't a spring return as in the rear drum brake). If the disk brake is overheating with no pedal pressure, then go back and check that the puck inside the caliper is ok.


    The new caliper should have been ready to install, but the old caliper required pressing back the puck.
    Since the travel of a puck is small and squeezing them back is difficult, I would only guess that it might be jammed at an angle from rough squeezing. Unless there are excessive miles on the car, The answer has to be ....... Buy a second caliper.

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More than likely if you have new calipers and they are sticking it sounds like the master cylinder. loosen the bleeder screw on the calipers then try to push the caliper piston in if it goes in easily then the master cylinder is bad if they dont push in easily with the bleeders open then the calipers are bad

Posted on Oct 19, 2009

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