Re: [MBZ] Cheap rotors
When Rusty was still in business and I was rehabbing my $400 '83 240D. I did all 4 brakes with the absolute cheapest rotors he had. I remember them being $25 or less each with a weird brand name like "Standard" which was what was printed on the box.I forget exactly but I think I drove that car for 25-30,000 miles on those brakes with the only issue being a failed rear caliper which was IIRC an ATE reman I got at Advance which they replaced under warranty.I'm not saying they were the best brakes in the world but they worked fine for the money. More expensive brakes wouldn't have made any sense on that hoopty... -Curt On Monday, March 23, 2020, 3:03:09 PM EDT, Andrew Strasfogel via Mercedes wrote: AutohausAZ offers a 4 different brake rotor brands selling from $27.59 to $61.99 (OEM Mercedes). I would probably settle for ATE at the cheaper end of the spectrum. On Mon, Mar 23, 2020 at 2:41 PM Karl Wittnebel via Mercedes < mercedes@okiebenz.com> wrote: > I read a pretty good description of the relationship btw pad and rotor > somewhere. Basically the pad transfers a certain amt of material to the > rotor when it is hot. If this is not done uniformly, the rotor surface > becomes uneven and causes vibration when brakes are applied. There is also > some change to the grain structure of the rotor which occurs unevenly if > you stop when the brakes are hot. So you are supposed to get them good and > hot a few times when new while avoiding full stops to get the material onto > the rotor evenly and the structure to change evenly. After that it becomes > less of a problem. > > On Mon, Mar 23, 2020, 11:15 AM G Mann via Mercedes > wrote: > > > All the "bedding in" procedures seem to be a poor mans heat treat to > > stabilize the rotor grain structure and keep it from warping. > > In the good old days, cast rotors were made from virgin iron ore, rather > > than recycled scrap, such as they are now. > > Recycled steel in today's foundry mix is a melt of steel and cast iron of > > fairly unknown mix, since the scrap today is most likely steel or cast > made > > from previous mixes of steel and cast when it recycled the last 6 times. > > Few castings are made from virgin iron ore these days. > > Thus, rotors have hard and soft areas which react to heat/cool cycles > > differently and warp, or expand at different rates which makes "pulsing > > brakes"... > > > > Those are my thoughts.. yours may be different. > > > > On Mon, Mar 23, 2020 at 7:43 AM Jaime Kopchinski via Mercedes < > > mercedes@okiebenz.com> wrote: > > > > > Some 116 and 107 rotors with a 116 part number are NLA from Mercedes. > > Just > > > got a set of Ate for a car, still available. > > > > > > Jaime > > > > > > > > > On Mon, Mar 23, 2020 at 9:31 AM Dan Penoff via Mercedes < > > > mercedes@okiebenz.com> wrote: > > > > > > > Ritter always said 3-4 stops from 60 to near zero in rapid > succession, > > > > then continue to drive normally for 10 minutes or so in order to > allow > > > > everything to cool off. I’ve used this approach for some years and > > never > > > > had a problem. However, I use ceramic pads almost exclusively now, so > > I’m > > > > not sure if this matters or not. > > > > > > > > -D > > > > > > > > > On Mar 23, 2020, at 9:26 AM, Curt Raymond via Mercedes < > > > > mercedes@okiebenz.com> wrote: > > > > > > > > > > There is much tribalism around how to bed in rotors. I've not found > > any > > > > value in it but I still give it a try occasionally. > > > > > My thought is that the first few stops with new pads and rotors > > should > > > > probably not be panic stops or descents down long grades while > holding > > > the > > > > car at speed only with the brakes. Beyond that it doesn't seem to > > matter. > > > > Probably best to follow whatever the manufacturer recommends. > > > > > > > > > > -Curt > > > > > > > > > > On Sunday, March 22, 2020, 9:02:58 PM EDT, Kaleb Striplin via > > > > Mercedes wrote: > > > > > > > > > > I have read something about bedding them in. Supposed to make > about > > 10 > > > > > slow downs but not come to a complete stop so the pad does not sit > on > > > > > there and imprint material on the rotor. I have actually never > > > followed > > > > > this procedure before. I may have to replace these cheap rotors > and > > > > > actually go thru the bed in procedure. > > > > > > > > > > On 3/22/2020 7:49 PM, OK Don via Mercedes wrote: > > > > >> Well, that would be hard with a new car - I'm calling BS. > > > > >> You don't turn them because they are too thin. > > > > >> Put a dial indicator on the rotor and measure to see if it's > > wobbling > > > or > > > > >> not. > > > > >> > > > > >> On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < > > > > >> mercedes@okiebenz.com> wrote: > > > > >> > > > > >>> . I seem to recall a long time ago hearing that you should > > not > > > > put > > > > >>> brand new pads on brand new rotors, but not sure what the reason > > > would > > > > b
Re: [MBZ] Cheap rotors
AutohausAZ offers a 4 different brake rotor brands selling from $27.59 to $61.99 (OEM Mercedes). I would probably settle for ATE at the cheaper end of the spectrum. On Mon, Mar 23, 2020 at 2:41 PM Karl Wittnebel via Mercedes < mercedes@okiebenz.com> wrote: > I read a pretty good description of the relationship btw pad and rotor > somewhere. Basically the pad transfers a certain amt of material to the > rotor when it is hot. If this is not done uniformly, the rotor surface > becomes uneven and causes vibration when brakes are applied. There is also > some change to the grain structure of the rotor which occurs unevenly if > you stop when the brakes are hot. So you are supposed to get them good and > hot a few times when new while avoiding full stops to get the material onto > the rotor evenly and the structure to change evenly. After that it becomes > less of a problem. > > On Mon, Mar 23, 2020, 11:15 AM G Mann via Mercedes > wrote: > > > All the "bedding in" procedures seem to be a poor mans heat treat to > > stabilize the rotor grain structure and keep it from warping. > > In the good old days, cast rotors were made from virgin iron ore, rather > > than recycled scrap, such as they are now. > > Recycled steel in today's foundry mix is a melt of steel and cast iron of > > fairly unknown mix, since the scrap today is most likely steel or cast > made > > from previous mixes of steel and cast when it recycled the last 6 times. > > Few castings are made from virgin iron ore these days. > > Thus, rotors have hard and soft areas which react to heat/cool cycles > > differently and warp, or expand at different rates which makes "pulsing > > brakes"... > > > > Those are my thoughts.. yours may be different. > > > > On Mon, Mar 23, 2020 at 7:43 AM Jaime Kopchinski via Mercedes < > > mercedes@okiebenz.com> wrote: > > > > > Some 116 and 107 rotors with a 116 part number are NLA from Mercedes. > > Just > > > got a set of Ate for a car, still available. > > > > > > Jaime > > > > > > > > > On Mon, Mar 23, 2020 at 9:31 AM Dan Penoff via Mercedes < > > > mercedes@okiebenz.com> wrote: > > > > > > > Ritter always said 3-4 stops from 60 to near zero in rapid > succession, > > > > then continue to drive normally for 10 minutes or so in order to > allow > > > > everything to cool off. I’ve used this approach for some years and > > never > > > > had a problem. However, I use ceramic pads almost exclusively now, so > > I’m > > > > not sure if this matters or not. > > > > > > > > -D > > > > > > > > > On Mar 23, 2020, at 9:26 AM, Curt Raymond via Mercedes < > > > > mercedes@okiebenz.com> wrote: > > > > > > > > > > There is much tribalism around how to bed in rotors. I've not found > > any > > > > value in it but I still give it a try occasionally. > > > > > My thought is that the first few stops with new pads and rotors > > should > > > > probably not be panic stops or descents down long grades while > holding > > > the > > > > car at speed only with the brakes. Beyond that it doesn't seem to > > matter. > > > > Probably best to follow whatever the manufacturer recommends. > > > > > > > > > > -Curt > > > > > > > > > >On Sunday, March 22, 2020, 9:02:58 PM EDT, Kaleb Striplin via > > > > Mercedes wrote: > > > > > > > > > > I have read something about bedding them in. Supposed to make > about > > 10 > > > > > slow downs but not come to a complete stop so the pad does not sit > on > > > > > there and imprint material on the rotor. I have actually never > > > followed > > > > > this procedure before. I may have to replace these cheap rotors > and > > > > > actually go thru the bed in procedure. > > > > > > > > > > On 3/22/2020 7:49 PM, OK Don via Mercedes wrote: > > > > >> Well, that would be hard with a new car - I'm calling BS. > > > > >> You don't turn them because they are too thin. > > > > >> Put a dial indicator on the rotor and measure to see if it's > > wobbling > > > or > > > > >> not. > > > > >> > > > > >> On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < > > > > >> mercedes@okiebenz.com> wrote: > > > > >> > > > > >>> . I seem to recall a long time ago hearing that you should > > not > > > > put > > > > >>> brand new pads on brand new rotors, but not sure what the reason > > > would > > > > be > > > > >>> if I did hear that somewhere. > > > > >>> > > > > > > > > > > ___ > > > > > http://www.okiebenz.com > > > > > > > > > > To search list archives http://www.okiebenz.com/archive/ > > > > > > > > > > To Unsubscribe or change delivery options go to: > > > > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > > > > > > > ___ > > > > > http://www.okiebenz.com > > > > > > > > > > To search list archives http://www.okiebenz.com/archive/ > > > > > > > > > > To Unsubscribe or change delivery options go to: > > > > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > > > > > > > >
Re: [MBZ] Cheap rotors
I read a pretty good description of the relationship btw pad and rotor somewhere. Basically the pad transfers a certain amt of material to the rotor when it is hot. If this is not done uniformly, the rotor surface becomes uneven and causes vibration when brakes are applied. There is also some change to the grain structure of the rotor which occurs unevenly if you stop when the brakes are hot. So you are supposed to get them good and hot a few times when new while avoiding full stops to get the material onto the rotor evenly and the structure to change evenly. After that it becomes less of a problem. On Mon, Mar 23, 2020, 11:15 AM G Mann via Mercedes wrote: > All the "bedding in" procedures seem to be a poor mans heat treat to > stabilize the rotor grain structure and keep it from warping. > In the good old days, cast rotors were made from virgin iron ore, rather > than recycled scrap, such as they are now. > Recycled steel in today's foundry mix is a melt of steel and cast iron of > fairly unknown mix, since the scrap today is most likely steel or cast made > from previous mixes of steel and cast when it recycled the last 6 times. > Few castings are made from virgin iron ore these days. > Thus, rotors have hard and soft areas which react to heat/cool cycles > differently and warp, or expand at different rates which makes "pulsing > brakes"... > > Those are my thoughts.. yours may be different. > > On Mon, Mar 23, 2020 at 7:43 AM Jaime Kopchinski via Mercedes < > mercedes@okiebenz.com> wrote: > > > Some 116 and 107 rotors with a 116 part number are NLA from Mercedes. > Just > > got a set of Ate for a car, still available. > > > > Jaime > > > > > > On Mon, Mar 23, 2020 at 9:31 AM Dan Penoff via Mercedes < > > mercedes@okiebenz.com> wrote: > > > > > Ritter always said 3-4 stops from 60 to near zero in rapid succession, > > > then continue to drive normally for 10 minutes or so in order to allow > > > everything to cool off. I’ve used this approach for some years and > never > > > had a problem. However, I use ceramic pads almost exclusively now, so > I’m > > > not sure if this matters or not. > > > > > > -D > > > > > > > On Mar 23, 2020, at 9:26 AM, Curt Raymond via Mercedes < > > > mercedes@okiebenz.com> wrote: > > > > > > > > There is much tribalism around how to bed in rotors. I've not found > any > > > value in it but I still give it a try occasionally. > > > > My thought is that the first few stops with new pads and rotors > should > > > probably not be panic stops or descents down long grades while holding > > the > > > car at speed only with the brakes. Beyond that it doesn't seem to > matter. > > > Probably best to follow whatever the manufacturer recommends. > > > > > > > > -Curt > > > > > > > >On Sunday, March 22, 2020, 9:02:58 PM EDT, Kaleb Striplin via > > > Mercedes wrote: > > > > > > > > I have read something about bedding them in. Supposed to make about > 10 > > > > slow downs but not come to a complete stop so the pad does not sit on > > > > there and imprint material on the rotor. I have actually never > > followed > > > > this procedure before. I may have to replace these cheap rotors and > > > > actually go thru the bed in procedure. > > > > > > > > On 3/22/2020 7:49 PM, OK Don via Mercedes wrote: > > > >> Well, that would be hard with a new car - I'm calling BS. > > > >> You don't turn them because they are too thin. > > > >> Put a dial indicator on the rotor and measure to see if it's > wobbling > > or > > > >> not. > > > >> > > > >> On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < > > > >> mercedes@okiebenz.com> wrote: > > > >> > > > >>> . I seem to recall a long time ago hearing that you should > not > > > put > > > >>> brand new pads on brand new rotors, but not sure what the reason > > would > > > be > > > >>> if I did hear that somewhere. > > > >>> > > > > > > > > ___ > > > > http://www.okiebenz.com > > > > > > > > To search list archives http://www.okiebenz.com/archive/ > > > > > > > > To Unsubscribe or change delivery options go to: > > > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > > > > ___ > > > > http://www.okiebenz.com > > > > > > > > To search list archives http://www.okiebenz.com/archive/ > > > > > > > > To Unsubscribe or change delivery options go to: > > > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > > > > > ___ > > > http://www.okiebenz.com > > > > > > To search list archives http://www.okiebenz.com/archive/ > > > > > > To Unsubscribe or change delivery options go to: > > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > -- > > Jaime Kopchinski > > http://www.jaimekop.com/ > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or chang
Re: [MBZ] Cheap rotors
All the "bedding in" procedures seem to be a poor mans heat treat to stabilize the rotor grain structure and keep it from warping. In the good old days, cast rotors were made from virgin iron ore, rather than recycled scrap, such as they are now. Recycled steel in today's foundry mix is a melt of steel and cast iron of fairly unknown mix, since the scrap today is most likely steel or cast made from previous mixes of steel and cast when it recycled the last 6 times. Few castings are made from virgin iron ore these days. Thus, rotors have hard and soft areas which react to heat/cool cycles differently and warp, or expand at different rates which makes "pulsing brakes"... Those are my thoughts.. yours may be different. On Mon, Mar 23, 2020 at 7:43 AM Jaime Kopchinski via Mercedes < mercedes@okiebenz.com> wrote: > Some 116 and 107 rotors with a 116 part number are NLA from Mercedes. Just > got a set of Ate for a car, still available. > > Jaime > > > On Mon, Mar 23, 2020 at 9:31 AM Dan Penoff via Mercedes < > mercedes@okiebenz.com> wrote: > > > Ritter always said 3-4 stops from 60 to near zero in rapid succession, > > then continue to drive normally for 10 minutes or so in order to allow > > everything to cool off. I’ve used this approach for some years and never > > had a problem. However, I use ceramic pads almost exclusively now, so I’m > > not sure if this matters or not. > > > > -D > > > > > On Mar 23, 2020, at 9:26 AM, Curt Raymond via Mercedes < > > mercedes@okiebenz.com> wrote: > > > > > > There is much tribalism around how to bed in rotors. I've not found any > > value in it but I still give it a try occasionally. > > > My thought is that the first few stops with new pads and rotors should > > probably not be panic stops or descents down long grades while holding > the > > car at speed only with the brakes. Beyond that it doesn't seem to matter. > > Probably best to follow whatever the manufacturer recommends. > > > > > > -Curt > > > > > >On Sunday, March 22, 2020, 9:02:58 PM EDT, Kaleb Striplin via > > Mercedes wrote: > > > > > > I have read something about bedding them in. Supposed to make about 10 > > > slow downs but not come to a complete stop so the pad does not sit on > > > there and imprint material on the rotor. I have actually never > followed > > > this procedure before. I may have to replace these cheap rotors and > > > actually go thru the bed in procedure. > > > > > > On 3/22/2020 7:49 PM, OK Don via Mercedes wrote: > > >> Well, that would be hard with a new car - I'm calling BS. > > >> You don't turn them because they are too thin. > > >> Put a dial indicator on the rotor and measure to see if it's wobbling > or > > >> not. > > >> > > >> On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < > > >> mercedes@okiebenz.com> wrote: > > >> > > >>> . I seem to recall a long time ago hearing that you should not > > put > > >>> brand new pads on brand new rotors, but not sure what the reason > would > > be > > >>> if I did hear that somewhere. > > >>> > > > > > > ___ > > > http://www.okiebenz.com > > > > > > To search list archives http://www.okiebenz.com/archive/ > > > > > > To Unsubscribe or change delivery options go to: > > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > ___ > > > http://www.okiebenz.com > > > > > > To search list archives http://www.okiebenz.com/archive/ > > > > > > To Unsubscribe or change delivery options go to: > > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > -- > Jaime Kopchinski > http://www.jaimekop.com/ > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
Some 116 and 107 rotors with a 116 part number are NLA from Mercedes. Just got a set of Ate for a car, still available. Jaime On Mon, Mar 23, 2020 at 9:31 AM Dan Penoff via Mercedes < mercedes@okiebenz.com> wrote: > Ritter always said 3-4 stops from 60 to near zero in rapid succession, > then continue to drive normally for 10 minutes or so in order to allow > everything to cool off. I’ve used this approach for some years and never > had a problem. However, I use ceramic pads almost exclusively now, so I’m > not sure if this matters or not. > > -D > > > On Mar 23, 2020, at 9:26 AM, Curt Raymond via Mercedes < > mercedes@okiebenz.com> wrote: > > > > There is much tribalism around how to bed in rotors. I've not found any > value in it but I still give it a try occasionally. > > My thought is that the first few stops with new pads and rotors should > probably not be panic stops or descents down long grades while holding the > car at speed only with the brakes. Beyond that it doesn't seem to matter. > Probably best to follow whatever the manufacturer recommends. > > > > -Curt > > > >On Sunday, March 22, 2020, 9:02:58 PM EDT, Kaleb Striplin via > Mercedes wrote: > > > > I have read something about bedding them in. Supposed to make about 10 > > slow downs but not come to a complete stop so the pad does not sit on > > there and imprint material on the rotor. I have actually never followed > > this procedure before. I may have to replace these cheap rotors and > > actually go thru the bed in procedure. > > > > On 3/22/2020 7:49 PM, OK Don via Mercedes wrote: > >> Well, that would be hard with a new car - I'm calling BS. > >> You don't turn them because they are too thin. > >> Put a dial indicator on the rotor and measure to see if it's wobbling or > >> not. > >> > >> On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < > >> mercedes@okiebenz.com> wrote: > >> > >>> . I seem to recall a long time ago hearing that you should not > put > >>> brand new pads on brand new rotors, but not sure what the reason would > be > >>> if I did hear that somewhere. > >>> > > > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > -- Jaime Kopchinski http://www.jaimekop.com/ ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
Ritter always said 3-4 stops from 60 to near zero in rapid succession, then continue to drive normally for 10 minutes or so in order to allow everything to cool off. I’ve used this approach for some years and never had a problem. However, I use ceramic pads almost exclusively now, so I’m not sure if this matters or not. -D > On Mar 23, 2020, at 9:26 AM, Curt Raymond via Mercedes > wrote: > > There is much tribalism around how to bed in rotors. I've not found any value > in it but I still give it a try occasionally. > My thought is that the first few stops with new pads and rotors should > probably not be panic stops or descents down long grades while holding the > car at speed only with the brakes. Beyond that it doesn't seem to matter. > Probably best to follow whatever the manufacturer recommends. > > -Curt > >On Sunday, March 22, 2020, 9:02:58 PM EDT, Kaleb Striplin via Mercedes > wrote: > > I have read something about bedding them in. Supposed to make about 10 > slow downs but not come to a complete stop so the pad does not sit on > there and imprint material on the rotor. I have actually never followed > this procedure before. I may have to replace these cheap rotors and > actually go thru the bed in procedure. > > On 3/22/2020 7:49 PM, OK Don via Mercedes wrote: >> Well, that would be hard with a new car - I'm calling BS. >> You don't turn them because they are too thin. >> Put a dial indicator on the rotor and measure to see if it's wobbling or >> not. >> >> On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < >> mercedes@okiebenz.com> wrote: >> >>> . I seem to recall a long time ago hearing that you should not put >>> brand new pads on brand new rotors, but not sure what the reason would be >>> if I did hear that somewhere. >>> > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
There used to be a time when a truckload of brake rotors got a special, increased, price at the scrap yard. That time has passed... -Curt On Sunday, March 22, 2020, 9:25:17 PM EDT, David Bruckmann via Mercedes wrote: At least for the W115 and W123, Mercedes used to cast the rotors themselves. Not sure if that's still the case, but there's most DEFINITELY a difference between brands based on manufacturing methodology. On Mar 22, 2020, Kaleb Striplin wrote: > > I bought some cheap rotors off rockauto a while back for the 01 e320.? > They seem to already be warped as I am already getting some pulsation on > braking.? I just figured a piece of metal is a piece of metal as far as > rotors go.? Perhaps not. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
There is much tribalism around how to bed in rotors. I've not found any value in it but I still give it a try occasionally. My thought is that the first few stops with new pads and rotors should probably not be panic stops or descents down long grades while holding the car at speed only with the brakes. Beyond that it doesn't seem to matter. Probably best to follow whatever the manufacturer recommends. -Curt On Sunday, March 22, 2020, 9:02:58 PM EDT, Kaleb Striplin via Mercedes wrote: I have read something about bedding them in. Supposed to make about 10 slow downs but not come to a complete stop so the pad does not sit on there and imprint material on the rotor. I have actually never followed this procedure before. I may have to replace these cheap rotors and actually go thru the bed in procedure. On 3/22/2020 7:49 PM, OK Don via Mercedes wrote: > Well, that would be hard with a new car - I'm calling BS. > You don't turn them because they are too thin. > Put a dial indicator on the rotor and measure to see if it's wobbling or > not. > > On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < > mercedes@okiebenz.com> wrote: > >> . I seem to recall a long time ago hearing that you should not put >> brand new pads on brand new rotors, but not sure what the reason would be >> if I did hear that somewhere. >> ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
Just some more info. My old Indies used the rule of thumb that you replaced the rotors with every 2nd or 3rd set of pads, depending on the rotor wear. Never turn the rotors. This worked great on both my 123 and 116. Best Wishes, Roger Roger Hale Dinnerware Classics, Inc. Monroe, Ga. 770-267-0850 www.dinnerwareclassics.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
Only thing you need to do is rough up the surface of rotors shipped in cosmoline after removing the "grease". This prevents the spiral grooves from turning or the coarse grind from wearing the pads funny initially. No prep needed for the coated ones, just install and drive. Light pedal if at all possible until the pads and rotor wear together to prevent localized overheating, but that doesn't take long. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
At least for the W115 and W123, Mercedes used to cast the rotors themselves. Not sure if that's still the case, but there's most DEFINITELY a difference between brands based on manufacturing methodology. On Mar 22, 2020, Kaleb Striplin wrote: > > I bought some cheap rotors off rockauto a while back for the 01 e320.? > They seem to already be warped as I am already getting some pulsation on > braking.? I just figured a piece of metal is a piece of metal as far as > rotors go.? Perhaps not. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
> Scott wrote: > This is interesting. Some say rotors literally warp and others > say it's a break-in issue. Does anyone really know? Gotta brake in the breaks right. Actually, "bed" them. I used to have a lot of trouble with my Suburban. After finding the info from Carroll Smith I have not had _any_. And I've done a few brake jobs on a few cars. https://www.brakes-shop.com/brakepedia/general/myths-of-the-braking-system Seems accurate, sciences holds up (so far as I can tell). ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
> Kaleb wrote: > I bought some cheap rotors off rockauto a while back for the 01 > e320. They seem to already be warped as I am already getting > some pulsation on braking. I just figured a piece of metal is a > piece of metal as far as rotors go. Perhaps not. Sounds like the fault of the installer, not the metal. See this article by Carrol Smith. My experience aligns with this article. https://www.brakes-shop.com/brakepedia/general/myths-of-the-braking-system ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
I have read something about bedding them in. Supposed to make about 10 slow downs but not come to a complete stop so the pad does not sit on there and imprint material on the rotor. I have actually never followed this procedure before. I may have to replace these cheap rotors and actually go thru the bed in procedure. On 3/22/2020 7:49 PM, OK Don via Mercedes wrote: Well, that would be hard with a new car - I'm calling BS. You don't turn them because they are too thin. Put a dial indicator on the rotor and measure to see if it's wobbling or not. On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < mercedes@okiebenz.com> wrote: . I seem to recall a long time ago hearing that you should not put brand new pads on brand new rotors, but not sure what the reason would be if I did hear that somewhere. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
One thing that can cause pedal pulsation is a hard spot in the rotor. Usually happens when you make a panic stop and then hold the pedal down, there is enough carbon in the pads and the rotor is hot enough you add some carbon the the spot under the pads, making it wear less that the rest of the surtace. Can be cured by very light turning (couple thousandths removed only) and prevented by allowing the car to roll a few feet after very hard stops. MB rotors are sacrificial -- by the end of the second set of pads they are too thin and need to be replaced. Reduces unsprung weight in the suspension and reduces the cost of the rotors. They are cheap, replace when necessary. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
I call BS on this as well. Along with the “you can’t turn Mercedes rotors”. As long as the rotor hasn’t exceeded the minimum thickness, there’s no reason why you can’t take metal off of it. OE rotors have a little quarter moon sort of notch in them that is the indicator of minimum thickness. You have to look close to see it, but it’s there. -D > On Mar 22, 2020, at 8:49 PM, OK Don via Mercedes > wrote: > > Well, that would be hard with a new car - I'm calling BS. > You don't turn them because they are too thin. > Put a dial indicator on the rotor and measure to see if it's wobbling or > not. > > On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < > mercedes@okiebenz.com> wrote: > >> . I seem to recall a long time ago hearing that you should not put >> brand new pads on brand new rotors, but not sure what the reason would be >> if I did hear that somewhere. >> > > -- > OK Don > > "Whenever you find yourself on the side of the majority, it is time to > pause and reflect." Mark Twain > > “Basic research is what I’m doing when I don’t know what I am doing.” Wernher > Von Braun > 2013 F150, 18 mpg > 2017 Subaru Legacy, 30 mpg > 1957 C182A, 12 mpg - but at 150 mph! > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
Well, that would be hard with a new car - I'm calling BS. You don't turn them because they are too thin. Put a dial indicator on the rotor and measure to see if it's wobbling or not. On Sun, Mar 22, 2020 at 7:34 PM Kaleb Striplin via Mercedes < mercedes@okiebenz.com> wrote: > . I seem to recall a long time ago hearing that you should not put > brand new pads on brand new rotors, but not sure what the reason would be > if I did hear that somewhere. > -- OK Don "Whenever you find yourself on the side of the majority, it is time to pause and reflect." Mark Twain “Basic research is what I’m doing when I don’t know what I am doing.” Wernher Von Braun 2013 F150, 18 mpg 2017 Subaru Legacy, 30 mpg 1957 C182A, 12 mpg - but at 150 mph! ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
I don’t know. All I do know is your not supposed to turn MB rotors for some reason. I replaced the pads and rotors at the same time btw. I seem to recall a long time ago hearing that you should not put brand new pads on brand new rotors, but not sure what the reason would be if I did hear that somewhere. Sent from my iPhone > On Mar 22, 2020, at 7:31 PM, Scott Ritchey via Mercedes > wrote: > > This is interesting. Some say rotors literally warp and others say it's a > break-in issue. Does anyone really know? > >> -Original Message- >> From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of >> Kaleb Striplin via Mercedes >> Sent: Sunday, March 22, 2020 7:54 PM >> To: Dan Penoff via Mercedes ; >> davesl...@okiebenz.com >> Cc: Kaleb Striplin >> Subject: [MBZ] Cheap rotors >> >> I bought some cheap rotors off rockauto a while back for the 01 e320. They >> seem to already be warped as I am already getting some pulsation on >> braking. I just figured a piece of metal is a piece of metal as far as >> rotors >> go. Perhaps not. >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Cheap rotors
This is interesting. Some say rotors literally warp and others say it's a break-in issue. Does anyone really know? > -Original Message- > From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of > Kaleb Striplin via Mercedes > Sent: Sunday, March 22, 2020 7:54 PM > To: Dan Penoff via Mercedes ; > davesl...@okiebenz.com > Cc: Kaleb Striplin > Subject: [MBZ] Cheap rotors > > I bought some cheap rotors off rockauto a while back for the 01 e320. They > seem to already be warped as I am already getting some pulsation on > braking. I just figured a piece of metal is a piece of metal as far as rotors > go. Perhaps not. > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] Cheap rotors
I bought some cheap rotors off rockauto a while back for the 01 e320. They seem to already be warped as I am already getting some pulsation on braking. I just figured a piece of metal is a piece of metal as far as rotors go. Perhaps not. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
