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Re: 2003 toyota corolla low brake fluid
The fluid level will drop when the brake pads and or shoes wear thinner. A good way to check for a hydraulic fluid leak is Shut engine off step down on the brake pedal and hold it for 3 minutes. The pedal should not slowly drop. It will go down and hold.
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Did you also change the brake pads? Add fluid to top of reservoir?
Was the brake pedal low before you changed the calipers or is this something that developed after you worked on the car? If it was there before the caliper change then it has nada to do with the work you did.
If there is no visible leaking at the wheels around the braking assembly's, then the fluid will be leaking out he back of the blake master cylinder into the vacuum booster. The master cylinder is where you have been topping up the brake fluid and the booster is the big black thing the master cylinder is bolted to. You need to have this looked at by a mechanic for proper repair (unless you really trust someone),as brakes are something I think are important to a vehicles operation.
Just as a note, there is no need to buy a new master cylinder, as most brake places would have exchange units available.
did you bench bleed the master cylinder before putting it on car. if not there is air in braking system. you can try this, have someone pump the brakes and hold them. when loosening line the brakes will go to floor, tell person to hold them till line is retightened. loosen one brake line to get trapped air out. close line and have person pump then hold the brakes and repeat above till the brakes go to floor. if this does not get all air out! then bleed at wheels. ( how to bench bleed master cylinder ).----- put in vise, fill resovoir full of brake fluid. use a dowel or similar to pump master cylinder,pump untill fluid is free of air bubbles shoots out that has no more air in it. keep fluid in it or you will get more air in it. when putting on car have fluid in it. as long as you do not loose fluid from lines, you should be ok!! have a good holiday !! if all else fails. be sure there is no leaks at the wheels or brake lines. usually if a wheel cylinder is leaking. you will see this on inside of wheels on backing plate. be sure to fill fluid when done.
i try to help you, firts refill brake fluid container,open purge valve in one wheel front only,wait few minutes when drops fluid, close this valve and open other wheel, same procedure, finally repeat this in each 4 wheels