Thread: Brake problems.
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Jdub Jdub is offline
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Join Date: Nov 2000
Location: Great NorthWest
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I am convinced you are experiencing the typical settling in of the new calipers, especially if you have put in new brake pads.

New caliper seals love to drag the puck back to the "last found" position. If this was deep in the caliper than it stands to reason that you must pump harder to get the pucks out that then engage the pads which then touch the rotors. That is why one poster suggested "pre-loading" the brakes by removing the pads and over-setting the pucks. By moving the pucks out, then pushing them in JUST ENOUGH TO BARELY get the pad in, you essentially take the slop out of the system. The degree of internal slop your foot is feeling is undoubtedly part air in the fluid (natural, must wait for it to disperse) and the mechanical disadvantage of pucks that have not yet settled out towards the rotor where they belong.

By the way, does the idle of the car change in any way when you touch the brakes? Question because that might indicate a leak at the booster (it is pressurized via manifold pressure). If you have idle fluctuation then you may have a leak.

Old 06-17-2003, 10:36 AM
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