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Car Forum / Ford / Ford Focus / April 2004Brake discs
Last year, when my then three-year old Focus was serviced, I was told that my brake pads would need replacing at the next annual service, and that the brake discs were 'lipped'. The car is now four years old, and I am not convinced that it should be needing new brake discs by this age. Has anyone else been told that new discs would be needed with new pads, and, if so, did you just have the pads done anyway. A visual look at the discs suggests that, yes, there is a 'lip' around the edge of the disc, but that this will always appear, as this is the part that the discs are not touching. But it doesn't look as though they are too badly worn to me. I've bought the Haynes manual, but this recommends doing checks upon the brake discs using a micrometer - something that I don't have. The car is coming up for having done 50,000 miles. What would be a usual time for a car's brake discs to need replacing? TIA JW > Last year, when my then three-year old Focus was serviced, I was told that > my brake pads would need replacing at the next annual service, and that the [quoted text clipped - 13 lines] > The car is coming up for having done 50,000 miles. What would be a usual > time for a car's brake discs to need replacing? This is normal wear with modern asbestos free pads and 'soft' discs. 50k is actually pretty good going. My Focus (00 Zetec) will be having new pads and discs at its next service (55k) Any mileage from around 25k upwards would be considered a reasonable lifespan for front discs now. Tim.. > This is normal wear with modern asbestos free pads and 'soft' discs. 50k is > actually pretty good going. My Focus (00 Zetec) will be having new pads and > discs at its next service (55k) > > Any mileage from around 25k upwards would be considered a reasonable > lifespan for front discs now. Thanks. It seems it is probably a good time to have them done. I think I shall be doing it myself though, and will probably plump for my gut feel of replacing front pads and discs, but only the pads at the rear, as the rear discs look a lot less worn than the front. Cheers JW > The car is coming up for having done 50,000 miles. What would be a usual > time for a car's brake discs to need replacing? You are fortunate to have got that much out of your brakes. See the thread a couple of days ago on the same topic. Always replace both disks and pads at the same time. Brakes are too important for safety to cut corners. > > The car is coming up for having done 50,000 miles. What would be a usual > > time for a car's brake discs to need replacing? > > You are fortunate to have got that much out of your brakes. See the thread a > couple of days ago on the same topic. Always replace both disks and pads at > the same time. Brakes are too important for safety to cut corners. Thanks Dave. I'm going to get myself a micrometer, and check them properly to see if they are within spec. JW > > > The car is coming up for having done 50,000 miles. What would be a usual > > > time for a car's brake discs to need replacing? [quoted text clipped - 9 lines] > > JW I found that over the years many service shops of various tyes have tried to persuade me that all sorts of amazing things were wrong with my cars - and a very serious safety hazard they were too! Ah, ha?! Thus I have always done my own servicing. Yes, discs lip very quickly, and you need to measure them to find out if they need replacing. You don't need to use a micrometer ....... if you have lots of spare cash! Does anyone know what the specs are on the front discs i.e. thickness when new and the minimum thickness? I was told that mine will need to be replaced soon and I have only 20k on them! > > > > The car is coming up for having done 50,000 miles. What would be a > usual [quoted text clipped - 20 lines] > they need replacing. You don't need to use a micrometer ....... if you > have lots of spare cash! > Does anyone know what the specs are on the front discs i.e. thickness > when new and the minimum thickness? I was told that mine will need to > be replaced soon and I have only 20k on them! Usually the minimum thickness is stamped on the disk itself. This info is from the 2000 Ford car service CD: (use a fixed width font if you want the columns to align) Disc Brake Specification mm inches ---------------------------------------------- Disc diameter 258 10.16 New disc nominal thickness 22 0.87 Worn disc discard thickness* 20 0.79 Maximum disc runout (installed) 0.050 0.002 Maximum thickness variation 0.020 0.0008 * When the discard thickness has been reached install a new disc. Particular care must be taken when refinishing discs that they are not below the minimum thickness dimensions. Appologies if I'm being a bit thick (if you excuse the pun). You say > New disc nominal thickness 22mm > Worn disc discard thickness* 20mm Is the thickness difrence between new and worn out discs really only 2mm? This sounds very low to me. Chris.. > > Does anyone know what the specs are on the front discs i.e. thickness > > when new and the minimum thickness? I was told that mine will need to [quoted text clipped - 17 lines] > disc. Particular care must be taken when refinishing discs that they > are not below the minimum thickness dimensions. > Appologies if I'm being a bit thick (if you excuse the pun). You say >> New disc nominal thickness 22mm >> Worn disc discard thickness* 20mm > > Is the thickness difrence between new and worn out discs really only 2mm? > This sounds very low to me. I copied and pasted the specs from the official Ford model year 2000 car service CD. HTH >Appologies if I'm being a bit thick (if you excuse the pun). You say >> New disc nominal thickness 22mm >> Worn disc discard thickness* 20mm > >Is the thickness difrence between new and worn out discs really only 2mm? >This sounds very low to me. The figures Mark posted are correct. 2mm is quite a lot of wear on a brake disk.  SignaturePaul Giverin British Jet Engine Website http://www.britjet.co.uk GUYS GET YOUR DISC ROTORS CRYO HARDENED!!! Goto search this out -- or go see THE BRAKE MAN.COM also, use a good grease!! TRY AMSOIL OR MOBIL 1 Your rotors will last five times longer!!!! John. > >Appologies if I'm being a bit thick (if you excuse the pun). You say > >> New disc nominal thickness 22mm [quoted text clipped - 10 lines] > > British Jet Engine Website http://www.britjet.co.uk In message <408D10E9.677262DF@rcip.com>, John Shk <john30@rcip.com> wrote >GUYS > [quoted text clipped - 5 lines] > >Your rotors will last five times longer!!!! The rotors may be the only things that survive the crash if you apply grease to their faces. SignatureAlan mailto:news2me_a_2003@amacleod.clara.co.uk Just for the record, rotors (or discs) should not be wearing out this quickly. This is a design fault. IN addition, no one is talking about turning the rotors instead of buying new ones. Are Focus rotors too thin to be turned? In another thread I mentioned that I had replaced pads and shoes on my 2000 Focus. The rotors were "lipped" as Dublevay noted but I don't see this as a problem if the surface is not scored. jor > Last year, when my then three-year old Focus was serviced, I was told that > my brake pads would need replacing at the next annual service, and that the [quoted text clipped - 17 lines] > > JW > Last year, when my then three-year old Focus was serviced, I was told that > my brake pads would need replacing at the next annual service, and that the [quoted text clipped - 17 lines] > > JW AFAIK I have 97K on my 2K ZX3, with original brakes, no problems with them at all, I bought the car used with 42K so if they were done before that I don't know. at 30,000 miles my car needed new rotors and pads. i have the 2001. The disks on my 2000yr 1600 were replaced last year at 52,000 when the drop links and the air con were also done. A good car in it's time but obviously Ford still don't know how to build a car to last or how to deliver one without a list of problems in the firrst place. If it is that difficult how do Mazda and Nissan manage it? > at 30,000 miles my car needed new rotors and pads. i have the 2001. |
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