Olly350z Posted December 26, 2016 Share Posted December 26, 2016 (edited) Hey Boys and Girls, Hope everyone has had a good Christmas so far! I swear my Z is one of the most temperamental cars on the planet! As some will know I had issues last month with the Clutch slave cylinder which decided to give up, luckily saved by Chris @ Tarmac Sportz. I don't think the two are linked but it is odd how the two have coincided. Its possible its been caused by the car sitting for a nearly a month? So basically I've had the car back on the road just over a week now, and everything seemed great. I took it for a run the day I got it back as the disks were looking a bit crusty on the surfaces but nothing a few normal braking stops would sort. But the last couple of days I've noticed what I can only assume is a warped disk. It happens at low speeds when the pedal is applied lightly, doesn't happen under harder braking from speed. You can easily hear a grinding "Donk" Donk" from inside the cabin and outside, and more importantly you can actually feel a "kickback" through the pedal. It feels like the pedal is fighting back. Braking isn't affected at all it just does not feel right for obvious reasons. The brakes themselves are MTEC drilled and grooved with HELL braided lines Another thing to note is that at slow speeds (less than 10MPH, turning speed basically), I get an audible "Donk" Donk" which is rhythmic (gets quicker or slower) but ONLY when turning left... Id thought this was driveshaft click but its bloody loud for that So to summarise Happens at low speeds, with light pedal pressure. Hard braking is fine until you slow down Easily hear and feel a "Donk" Donk" metally sound, and feel through the pedal Brakes are newish, less than a year old and done less than 10K miles Any ideas guys? Edited December 26, 2016 by Olly350z Quote Link to comment Share on other sites More sharing options...
Ekona Posted December 26, 2016 Share Posted December 26, 2016 Probably, but might just be pad transfer. Go and do a proper clean up procedure, and see what happens. 50 to 30 light pressure x5 70 to 30 med pressure x5 100 to 40 hard as you can but not triggering ABS x5 Leaving a good few miles of driving without touching the brakes in between. Quote Link to comment Share on other sites More sharing options...
350zedd Posted December 26, 2016 Share Posted December 26, 2016 Do I have a wrapped Disk? Seeing as its Christmas, that's a good possibility! Check under the tree to make sure! Quote Link to comment Share on other sites More sharing options...
NazMan Posted December 26, 2016 Share Posted December 26, 2016 Do I have a wrapped Disk? Seeing as its Christmas, that's a good possibility! Check under the tree to make sure! Quote Link to comment Share on other sites More sharing options...
Ekona Posted December 26, 2016 Share Posted December 26, 2016 Being correct is never pedantic. And hey, it wasn't me for once! 2 Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted December 26, 2016 Share Posted December 26, 2016 I was thinking of getting my disks wrapped but couldn't decide on a colour What do you guys think ? 2 Quote Link to comment Share on other sites More sharing options...
davey_83 Posted December 26, 2016 Share Posted December 26, 2016 Maybe unevenly torqued wheel nuts Quote Link to comment Share on other sites More sharing options...
Ricey Posted December 26, 2016 Share Posted December 26, 2016 Maybe unevenly torqued wheel nuts Im gonna say highly unlikely. It would he giving it hell at all speeds and would be pulling all over the road Shirley? Sent from my SM-G925F using Tapatalk Quote Link to comment Share on other sites More sharing options...
Alpinaman Posted December 26, 2016 Share Posted December 26, 2016 Shirley ? I would say pad transfer.... Discs rarely warp.. If i dont drive mine over weekend i can feel the discs until they have cleaned up/. Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted December 26, 2016 Share Posted December 26, 2016 PH speak Quote Link to comment Share on other sites More sharing options...
Olly350z Posted December 26, 2016 Author Share Posted December 26, 2016 Just an FYI guys, heavily dyslexic person here! Doh on the topic title. My bad, mybe ill tlk lyke dis yh Thanks to those for the sensible replies. If anyone else has any other ideas id appreciate to hear them, just if the grammar teachers could pipe down. Whats padd transference? 1 Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted December 26, 2016 Share Posted December 26, 2016 Just an FYI guys, heavily dyslexic person here! Doh on the topic title. My bad, mybe ill tlk lyke dis yh Thanks to those for the sensible replies. If anyone else has any other ideas id appreciate to hear them, just if the grammar teachers could pipe down. Whats padd transference? So what did you mean to say ? Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted December 26, 2016 Share Posted December 26, 2016 (edited) Pad transferance is when, after using the brakes heavilly for a period (say on a spirited drive), a little bit of the pad bonds to the disc. Usually caused by not coming off the brakes when coming to rest HTH Edited December 26, 2016 by ATTAK Z Quote Link to comment Share on other sites More sharing options...
350zedd Posted December 26, 2016 Share Posted December 26, 2016 Quote Link to comment Share on other sites More sharing options...
Mopedmark Posted December 26, 2016 Share Posted December 26, 2016 Also check the wheel bearing 1 Quote Link to comment Share on other sites More sharing options...
RobPhoboS Posted December 26, 2016 Share Posted December 26, 2016 http://www.stoptech.com/technical-support/technical-white-papers/-warped-brake-disc-and-other-myths 1 Quote Link to comment Share on other sites More sharing options...
Olly350z Posted December 27, 2016 Author Share Posted December 27, 2016 Ive tried doing tbe braking procedures you mentioned tonight Ekona, doesnt seem to have made a difference. Although its pretty cold tonight so didnt go too mad. Will pull them apart tomorrow armed with a wire wheel brush for the hubs and brake cleaner tomorrow. Sigh Quote Link to comment Share on other sites More sharing options...
Ekona Posted December 27, 2016 Share Posted December 27, 2016 You do need to go pretty tough on them, the idea is to generate some serious heat (especially the last set) and accelerate as quickly as you can to target speed. Quote Link to comment Share on other sites More sharing options...
Olly350z Posted December 27, 2016 Author Share Posted December 27, 2016 You do need to go pretty tough on them, the idea is to generate some serious heat (especially the last set) and accelerate as quickly as you can to target speed. Think I owe you a beer Ekona, took them all apart today and cleaned everything, sanded the padds slightly and cleaned the disks then took it for another heavy braking session as it was dry, really dod some harsh stops and it seems to have cured it! Touch wood 2 Quote Link to comment Share on other sites More sharing options...
davey_83 Posted December 27, 2016 Share Posted December 27, 2016 Or you bolted the wheel on square this time haha....... Quote Link to comment Share on other sites More sharing options...
Olly350z Posted December 28, 2016 Author Share Posted December 28, 2016 Nah because it was still doing it in the beginning! Was only after a record breaking stop from 100MPH that its started behaving itself! Nice try DaveyWavey "DEEZ NUTZ" Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.