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Loud 'clunk/knocking' Noise When Braking.
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<blockquote data-quote="sudha" data-source="post: 597815" data-attributes="member: 1233"><p>Hi ... I experienced a few uneasy clunking sounds my self on my e32.</p><p></p><p>based on your description, i had a similar problem. During low speeds after just starting, i would have loud grinding noise (not clunking - sounded more like **Groong..Groong..Groong*) whevenever the brake is applied, and there would be kickbacks from the pedal, as if the pedal is kicking back...with vibrations.</p><p></p><p>I had it checked and the mechanic discovered that the culprit was the ABS sensor. what made it worse was that the warning system was somehow disabled and the bulb for the ABS warning system was removed.</p><p></p><p>Had the sensors replaced and the problem did not resurface.</p><p></p><p>However, after that episode, i had another problem which bothered me for exactly a year. i would hear loud metal clunking noise from the front right wheel whenever i hit uneven road surface. After multiple visits to the mechanic, I could not diagnose the fault or the source of the problem.</p><p></p><p>Suspension bushings were replaced, mountinfs changed and suspension checked and given the green light but the problem still persisted. One fine day it hit that the sound does not appear when the brake is applied, so I guessed it was the brake system on the front right wheel.</p><p></p><p>So with the new found theory, i headed to the mechanic and had the car checked.</p><p></p><p>The mech took off the wheel and started hitting the front caliper and true enough, i heard a familiar sound. The first mechanic who sorted the problem of my ABS sensors, missed out something.</p><p></p><p>The cuplrit was a missing clip on the front calipers.</p><p></p><p>So, if you have a grinding sound when applying brake with some vibration or feedback on the pedals, try looking at the ABS sensors. you may also want to see if the ABS light on your instrument cluster lights up when ignition key is turned on.</p><p></p><p>if you have loud clunking noise like to metal bits are colliding...then check your calipers. </p><p></p><p>I know we have two very different cars but no harm checking. Just a thought.</p><p></p><p>Cheers!</p></blockquote><p></p>
[QUOTE="sudha, post: 597815, member: 1233"] Hi ... I experienced a few uneasy clunking sounds my self on my e32. based on your description, i had a similar problem. During low speeds after just starting, i would have loud grinding noise (not clunking - sounded more like **Groong..Groong..Groong*) whevenever the brake is applied, and there would be kickbacks from the pedal, as if the pedal is kicking back...with vibrations. I had it checked and the mechanic discovered that the culprit was the ABS sensor. what made it worse was that the warning system was somehow disabled and the bulb for the ABS warning system was removed. Had the sensors replaced and the problem did not resurface. However, after that episode, i had another problem which bothered me for exactly a year. i would hear loud metal clunking noise from the front right wheel whenever i hit uneven road surface. After multiple visits to the mechanic, I could not diagnose the fault or the source of the problem. Suspension bushings were replaced, mountinfs changed and suspension checked and given the green light but the problem still persisted. One fine day it hit that the sound does not appear when the brake is applied, so I guessed it was the brake system on the front right wheel. So with the new found theory, i headed to the mechanic and had the car checked. The mech took off the wheel and started hitting the front caliper and true enough, i heard a familiar sound. The first mechanic who sorted the problem of my ABS sensors, missed out something. The cuplrit was a missing clip on the front calipers. So, if you have a grinding sound when applying brake with some vibration or feedback on the pedals, try looking at the ABS sensors. you may also want to see if the ABS light on your instrument cluster lights up when ignition key is turned on. if you have loud clunking noise like to metal bits are colliding...then check your calipers. I know we have two very different cars but no harm checking. Just a thought. Cheers! [/QUOTE]
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