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Old 04-24-2006, 09:33 PM
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brake system trouble

my brakes are spoungy i have to push the brake 3/4 of the way in befor i get any resistance
i have flushed the brake system with new brake fluid and bled the brakes for about 2 hours
i have isolated the system i took a pair of pliers and pinched of each wheel if i pinch off the right front wheel the brakes still spoungy but if i pinch off the left wheel they are rock solid
so i feel that there is somthing wrong with my left front caliper
does this make sense?

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Old 04-24-2006, 09:48 PM
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What kind of car are you working on?

Steve
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Old 04-24-2006, 09:52 PM
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well its a mazda b2200 with brembo brake calipers the calipers where installed about a year ago
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Old 04-24-2006, 09:57 PM
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Do you have any fluid leaks at that caliper? If not I would have to think by pinching off the fluid to that caliper, and getting a brake pedal, it would be a bad caliper.

Steve
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Old 04-24-2006, 10:02 PM
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nope no leakes
is pinching off the lines some thing that is ok to do to a brake system i didnt pinch them really tight i just kind of put a little squeze on them to stop the fluid
i think its the caliper to
i guess ill have to rebuild it
and find out if thst fixes it
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Old 04-24-2006, 10:52 PM
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Do you have a hose on that side..sometimes hoses can get spongy and create that feel..

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Old 04-24-2006, 11:05 PM
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One time I was putting new calipers on a 89 K car and couldn't get any brakes. Must have bled a couple of litres of fluid through, and finally figured out I had the calipers mixed up. Bolted right up no problem. The only thing was the bleed screws were on the bottom instead of the top. Maybe something like that?
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Old 04-25-2006, 07:55 AM
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As crownver mentioned, make SURE the bleeder screw is at the TOP of the caliper. If not the caliper WILL NOT bleed all the air out. If that's okay, sounds like you have an air leak in the offending caliper. Replace the hose and caliper, either one could be leaking. Before you do that though, try tightening the hose connection to the caliper then bleed again. That might be all it is.

Clamping off the hoses was a good idea! As long as you didn't really put the squeeze on them there should be no damage. If there is visible damage on the outside they need to be replaced, of course. Don't want one to burst in a panic stop! If the caliper is bad enough to need replacing I always replace the hose then, unless I know for sure it's been replaced in the last few years. Since you have to take the caliper off and bleed it's quick and easy to replace the hose too.
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