Question about 2000 Daewoo Leganza
About 6000 miles ago i replaced the front rotoes & pads due to wear& brake judder from the right so i replaced both sides all seemed fine no judder,then about 3 weeks ago the brakes started making a noise scimilar to thet of lorry brakes when they need the drums cleaning out,the noise is not a squeel but sounds more like a low pitched mountain horn but loud,this comes on after about 5 miles after applying the brakes&then even when released the noise remains untill i brake again&the noise stops under hard braking,i have replaced the brake hose & caliper piston seal & another new rotor but the problem persists,the wheel bearing seems smooth with no play in any direction
ie side to side up & down & in or out , the problem gets worse when driving at say 50 miles an hour or more when the rotor seems to be banging rapidly as it rotates ps the car brakes in a straight line with no vibration through the steering wheel or pedal or floor pan,its now getting to desperate stages & having worked on cars of my own for some 25 years i do not have any idea whats causing this
It may be caused by Disc Thickness Variation, which occurs when the pads brush the sides of an out of alignment rotor. Also, it could be that the rotors need to be resurfaced due to poor surface finish. I have also seen that when the brakes drag on the pads (DTV) that any pad dust will collect in the low spots and squeal after braking. I would recommend dropping the calipers and thoroughly cleaning the rotors and pads off with warm soapy water and a rag. I don't recommend brake cleaner or silencing sprays because they just add un-needed material to a contact surface and can actually cause noise and prevent full pad contact.
See HERE for troubleshooting information from English Brake Corp.
See HERE for Tech Questions answered from Bendix Corp.
I can also suggest checking the hub face with a roller-tipped dial indicator gauge to confirm that it doesn't have any lateral run-out. Run-out of over .002" would be out of spec.
HOPE THIS HELPS!!! Please don't forget to rate!
Posted on May 17, 2010
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Posted on Jan 02, 2017
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