Tuesday, October 25, 2011

Car brakes vibrating, clunking noise?

ok long story short. a month or two ago my 93 chevy corsica had some heavy brake grinding when driving below 30. checked the front pads, turned out the passenger side caliper seized and had no pad left. changed front diver and passenger pads and only front passenger caliper. when going for a test drive i noticed my brake petal was now vibrating hard with each stop and car was pulling to the left (opposite the side with the new caliper) while driving and a tiny bit when stopping. when it stops its very jerky like its getting tighers, then lets go a little, then tighens again and does this till i come to a stop. a week or two later i noticed extreme heat and smell comming from the side we changed the caliper on but i thought it was just the pads wearing in. now its a month or two later and the font passenger with the newer caliper has no pad and is begining to grind again. also theres a nice clunking noise comming from the rear driver side. what the hell is wrong with my car?
Car brakes vibrating, clunking noise?
There could be a number of things. First of all your brake fluid could be bad. Brake fluid is hydroscopic and absorbs water. When there is too much water in the fluid it will begin to rust the insdies of your brake lines and the rust will settle in your calipers and seize or damage the cylinder in the caliper, causing them to stick. To change your fluid get a syringe or something to remove all the fluid that you can from the reservoir and then fill it with new fluid. Then open up your bleeders one each wheel and either try and pump through the fluid with the pedal or a bleeder vaccum. This is to push out all the fluid still in your lines. Make sure you keep your reservoir full and when you see the new fluid coming through your lines then your done. (The old fluid will be very cloudy and the new will be an amber color). Close up your lines after that and then bleed all your lines like normal. You will need to rebuild or replace your caliper(s) to ensure that they work right but only after you have flushed the new fluid through or else you will find yourself in the same situation as before. And you probably should also replace your rotors because that can cause vibrations in you petal when stopping. Especially since you had metal to metal grinding.

As for the rear does it clunk when you hit the brakes? If so then you need to adjust your rear brake pads. Assuming that they are drum brakes then open the inspection hole on the botom back side to reveal the adjuster turn it a litlle bit (it will only go one way) and then test it, repeat until the clunk goes away.
Car brakes vibrating, clunking noise?
your caliper may have not been the original problem. replace both flexlines going to the calipers. if one has collapsed inside itself it would do the same thing as a stuck caliper. when you have finished this job and while the car is still up in the air have someone apply the brakes for you and when they are released, spin the tires to make sure that they spin freely. good luck