squealing brake

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  #1  
Old 07-03-04, 09:09 PM
daniel22
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squealing brake

I have a 98 chevy malibu....just recently the passenger side brake has started squealing if you push the brake in all the way it will stop......oh and the abs light has been on since we bought the car....figured it was supposed to be.
 
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Old 07-04-04, 07:29 AM
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Pull the wheel and check your brake pads for wear; may need new ones.
 
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Old 07-04-04, 07:30 AM
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You probably have a wear indicator touching the rotor if the noise stops when you apply the brakes. If so it is warning you that you need to replace the brake pads soon, before you tear up the rotors.

The ABS light should come on as a check when you start the car but it should not be on when you are driving the car. You need to get the codes pulled from the onboard computer and see what is wrong.
 
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Old 07-04-04, 07:45 AM
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You might also check the brake fluid level in the reservoir, but check the pad wear first; if you need new pads the fluid level will go back up some when you compress the pistons in the calipers to install the new pads.
 
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Old 07-04-04, 06:53 PM
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Originally Posted by the_tow_guy
You might also check the brake fluid level in the reservoir, but check the pad wear first; if you need new pads the fluid level will go back up some when you compress the pistons in the calipers to install the new pads.
If you compress the caliper pistons and force the old brake fluid back to the master cylinder in a car with ABS brakes you are inviting very expensive repairs in the future!!
 
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Old 07-05-04, 05:24 AM
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Oops, thanks for the catch, nut. I think I knew that, but none of my current vehicles have ABS so got a little absent-minded. Don't think I've ever heard the engineering explanation for that; educate us?
 
  #7  
Old 07-05-04, 08:17 PM
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The brake fluid becomes most contaminated at the calipers or wheel cylinders because they are subject to the highest swings in temperature because of the heat generated during braking. Normally this fluid stays there and the only risk is a leaky caliper or wheel cylinder.

The ABS units are said to be very sensitive to contaminated fluid so when you let the fluid go back to the master cylinder it can then get into the ABS unit during ABS operation and over time cause early ABS problems.

Some manufacturers such as Honda have recomended brake fluid replacement every 2-3 years as preventive maintainence in non ABS systems to prevent master cylinder and caliper/wheel cyl. leaks. Few people do this but with ABS systems as you know the cost can be huge for ABS repair/replacement. I feel it is now even more important with ABS as preventive maintenance. Those who do not change their brake fluid and keep their cars long enough may wish they had changed it.
 
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