Vibration when braking??
04-01-2009, 03:49 PM
#11
could be something as simple as pad deposit buildup in one place.. Give it a few really good hard stabs on the brake from speed, without coming to a complete stop, then drive around slowly for a few miles to let the brakes cool.. Might help.
04-01-2009, 05:39 PM
#12
Rotors are like Cinnamon buns, not every one comes out of the oven perfect. The only way to determine if the rotor is out of spec is to attach a dial indicator and measure the runout. A technician should do this.
There are other reasons you could feel vibration. Bad or sintered bearings, or bent, broken, or cracked suspension components. Trouble with wheel sensors and the anti-lock braking system. Could also be a set of pads that are not to specification.
It is not acceptable on a new car. Take it back, Jack. Dealers usually try to blame drivers for warranty brake problems because claims are looked at very carefully by VW. Let them know you are having none of that, and the factory should cover the repair.
There are other reasons you could feel vibration. Bad or sintered bearings, or bent, broken, or cracked suspension components. Trouble with wheel sensors and the anti-lock braking system. Could also be a set of pads that are not to specification.
It is not acceptable on a new car. Take it back, Jack. Dealers usually try to blame drivers for warranty brake problems because claims are looked at very carefully by VW. Let them know you are having none of that, and the factory should cover the repair.
04-01-2009, 10:24 PM
#13
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It is a common misconception that brake vibration is caused by warped rotors. In most cases, the vibration is caused from uneven pad deposits that affect the pads as the are pressured against the rotor as the rotor turns. So, the marked area that is visible on the rotor is likely the culpret.
It appears that somehow, during manufacture or shipping your brakes were held tightly against the rotor, causing the vibration. There are two ways to resolve the problem.
The first method is to remove the brake pads, and insert brake pads that have a much higher destruction rate. The more aggressive pads will quicly wear away the uneven pad deposits and as soon as the problem is resolved, you can once again put in the right pads.
The second method is to put the brake rotors on a magnetic surface grinder, and have them ground flat.
As this is a new car, is under warranty, and has only 700 miles, you should not have to deal with any of this nonsense, and you should simply bring the car into the dealer. When you bring the car in, make it clear that driving the car in this condition to "slowly wear away the pad deposits" is not an acceptable corrective action for a $50K car. The car should be perfect at delivery, and you have every right to make them know that you're dissatisfied. To get them to respond properly, you can simply mention that it's this kind of defect and the response from the technician that will cause signifficant and detrimental damage to your confidence in the car, which will be reflected in the customer satisfaction survey.
That will get them to jump,
Good luck
It appears that somehow, during manufacture or shipping your brakes were held tightly against the rotor, causing the vibration. There are two ways to resolve the problem.
The first method is to remove the brake pads, and insert brake pads that have a much higher destruction rate. The more aggressive pads will quicly wear away the uneven pad deposits and as soon as the problem is resolved, you can once again put in the right pads.
The second method is to put the brake rotors on a magnetic surface grinder, and have them ground flat.
As this is a new car, is under warranty, and has only 700 miles, you should not have to deal with any of this nonsense, and you should simply bring the car into the dealer. When you bring the car in, make it clear that driving the car in this condition to "slowly wear away the pad deposits" is not an acceptable corrective action for a $50K car. The car should be perfect at delivery, and you have every right to make them know that you're dissatisfied. To get them to respond properly, you can simply mention that it's this kind of defect and the response from the technician that will cause signifficant and detrimental damage to your confidence in the car, which will be reflected in the customer satisfaction survey.
That will get them to jump,
Good luck
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