Re: [MBZ] Rear brake part 2
Neal - Along the same line of thought as Jim, how about measuring the OD of the new rotor. Could it possibly be too great of a diameter and sometimes under the right conditions be rubbing inside the caliper? Barry after the rotors were replaced, this noise appeared. Well, just reading the above I'd say you have defective rotors, or the wrong ones.
Re: [MBZ] Rear brake part 2
Barry, Both rotors were replaced at the same time and only the left has been a problem. Last night I switched rotors and on my ususal drive to work got the same results on the left side. I dropped the car at my local shop and asked for someone to give it drive until they hear the noise. Maybe if someone else with more experience hears it they will be able to narrow down the problem Neal Barry Stark wrote: Neal - Along the same line of thought as Jim, how about measuring the OD of the new rotor. Could it possibly be too great of a diameter and sometimes under the right conditions be rubbing inside the caliper? Barry after the rotors were replaced, this noise appeared. Well, just reading the above I'd say you have defective rotors, or the wrong ones. ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
Re: [MBZ] Rear brake part 2
On May 17, 2006, at 10:22 AM, [EMAIL PROTECTED] wrote: A warped rotor? Something in the brake hydraulics? I guess it's time to switch rotors as a test as I'm getting a bit tired of replacing parts with no effect. Thanks for the help . Neal, How about the rear wheel bearings? When one goes South, it can screech and thump and whine and scrape. Most of the time the sound will change while negotiating bends in the road. Johnny B. I Mac Therefore I am
Re: [MBZ] Rear brake part 2
Since I'm stumped after all the manipulations I dropped the car at my inde to test drive and maybe their trained ears can define the problem. Since switching the rotors didn't change anything I looking at all possibilities. Neal John Berryman wrote: On May 17, 2006, at 10:22 AM, [EMAIL PROTECTED] wrote: A warped rotor? Something in the brake hydraulics? I guess it's time to switch rotors as a test as I'm getting a bit tired of replacing parts with no effect. Thanks for the help . Neal, How about the rear wheel bearings? When one goes South, it can screech and thump and whine and scrape. Most of the time the sound will change while negotiating bends in the road. Johnny B. I Mac Therefore I am ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
[MBZ] Rear brake part 2
Thanks for the help list. But even without the parking brake shoes the noise continues. I can hear the rubbing of the pads on the rotor and am more convinced that the rotor is the problem; it just seems too loose. Maybe wheel bolts are too long to give a tight fit, but I really snug them with a cheater bar. The basic sound at very low speed is the rotor flopping on the hub and at high speed a constant rubbing and the occasional bang. A warped rotor? Something in the brake hydraulics? I guess it's time to switch rotors as a test as I'm getting a bit tired of replacing parts with no effect. Thanks for the help . Neal
Re: [MBZ] Rear brake part 2
Neal, First note that back shock absorbers can make funny noises too. However if you believe the problem is with breaks here is a couple of things to try. #1 swap rotors with other side. #2 take brake caliper and compress it like you were putting on new pads. Then take a pair of needle nose vise grips and clamp off rubber brake line. This will disable the brake on that side. Note that this is not safe. Also note your car will pull to one when applying brakes. The first one will tell you of the problem is the rotor. The second one will tell you if the problem is in the brakes at all. Trampas -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Neal Kramarcy Sent: Wednesday, May 17, 2006 7:53 AM To: Mercedes Discussion List Subject: [MBZ] Rear brake part 2 Thanks for the help list. But even without the parking brake shoes the noise continues. I can hear the rubbing of the pads on the rotor and am more convinced that the rotor is the problem; it just seems too loose. Maybe wheel bolts are too long to give a tight fit, but I really snug them with a cheater bar. The basic sound at very low speed is the rotor flopping on the hub and at high speed a constant rubbing and the occasional bang. A warped rotor? Something in the brake hydraulics? I guess it's time to switch rotors as a test as I'm getting a bit tired of replacing parts with no effect. Thanks for the help . Neal ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
Re: [MBZ] Rear brake part 2
Thanks for the help Trampas. Trampas wrote: Neal, First note that back shock absorbers can make funny noises too. However if you believe the problem is with breaks here is a couple of things to try. #1 swap rotors with other side. #2 take brake caliper and compress it like you were putting on new pads. Then take a pair of needle nose vise grips and clamp off rubber brake line. This will disable the brake on that side. Note that this is not safe. Also note your car will pull to one when applying brakes. The first one will tell you of the problem is the rotor. The second one will tell you if the problem is in the brakes at all. Trampas -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Neal Kramarcy Sent: Wednesday, May 17, 2006 7:53 AM To: Mercedes Discussion List Subject: [MBZ] Rear brake part 2 Thanks for the help list. But even without the parking brake shoes the noise continues. I can hear the rubbing of the pads on the rotor and am more convinced that the rotor is the problem; it just seems too loose. Maybe wheel bolts are too long to give a tight fit, but I really snug them with a cheater bar. The basic sound at very low speed is the rotor flopping on the hub and at high speed a constant rubbing and the occasional bang. A warped rotor? Something in the brake hydraulics? I guess it's time to switch rotors as a test as I'm getting a bit tired of replacing parts with no effect. Thanks for the help . Neal ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
Re: [MBZ] Rear brake part 2
I know this is strange. And for years I had no problems with the rear brakes or noise. This car had been used by my ex until last year and I rarely drove it unless to tend to a repair job. But in the last year, after the rotors were replaced, this noise appeared. Since I thought it a bad driveaxle and I was a bit short on cash and had a reliable 300TD for a daily driver, I parked the coupe. But once I started attending to the noise problem and replacing various parts, all with no effect, the rotor and /or bolts are my point of attack now. These are the original bundt pans (I labeled the inside of wheel since I sometimes swaped them around with the others). The rotor has the locating hole and I position it on the pin and snug everything down. One of the first times I heard the sound I pulled the wheed and found the brake pad pins loose and thought that was a possible source of the problem, but since then the pins are driven home and flush with the caliper. Last night I removed the parking shoes on the suspect wheel, so even if the bolts were too long there is nothing in there to rub. A few weeks ago one of my strategies was to compress the pads into the caliper before leaving in the morning and got a little bit of relief. My thinking was a faulty caliper with failed seals ( the caliper was the original and looked quite worn at the piston edges). Yet replacing the caliper changed nothing. I will check the perceived tightness of the wheel tonight after snugging the bolts. Maybe the bolts a loosening from the hub enough to give the problem, so I will switch bolts as a test. Neal Jim Cathey wrote: more convinced that the rotor is the problem; it just seems too loose. Maybe wheel bolts are too long to give a tight fit, but I really snug them with a cheater bar. This sounds totally strange. The rotor is one piece, and is supposed to be tightly pinned between the hub and the wheel by the bolts. I believe it has an extra sixth hole for a locator pin that's on the hub that has to be in the right rotor hole or you can't even put the wheel on. I don't see how the rotor could be loose at all without the wheel also being loose. Wheel bolts that are too long (such as alloy wheel bolts used on steel wheels) will protrude into the hub far enough to interfere with the parking brake mechanism. That's usually obvious, and bad! These _are_ the right wheels for the car, right? Stock alloys? -- Jim ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
Re: [MBZ] Rear brake part 2
In a message dated 5/17/2006 4:53:53 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: Thanks for the help list. But even without the parking brake shoes the noise continues. I can hear the rubbing of the pads on the rotor and am more convinced that the rotor is the problem; it just seems too loose. Maybe wheel bolts are too long to give a tight fit, but I really snug them with a cheater bar. The basic sound at very low speed is the rotor flopping on the hub and at high speed a constant rubbing and the occasional bang. A warped rotor? Something in the brake hydraulics? I guess it's time to switch rotors as a test as I'm getting a bit tired of replacing parts with no effect. Thanks for the help . Neal, If the rotor is loose, maybe the studs have too much shoulder and you are running out of threads before the rotor tightens. Jim Friesen Phoenix AZ 79 300SD, 262 K miles 98 ML 320, 142 K miles
Re: [MBZ] Rear brake part 2
after the rotors were replaced, this noise appeared. Well, just reading the above I'd say you have defective rotors, or the wrong ones. -- Jim
