steering shake

Discussion in 'All Things Technical' started by Obey 1, Jul 12, 2019 at 8:09 PM.

  1. Obey 1

    Obey 1 Well-Known Member

    i have had fitted in the past some prodrive alcons ran for a while then replaced the discs since running them in and new pads ebc blues i have had the discs skimmed twice for this issue , now its happening again and peeing me off , the car when braking at speed shakes the steering wheel like mad and feels the front end is shaking like a loose wheel or buckle or even something else with suspension bushes or whishbones its doing my head in as theses brakes are not cheap to service , need someone of expertise to oversee this please
     
  2. ELV1S

    ELV1S Administrator

    Sometimes you just have to bite the bullet and buy new discs Dave, skimming them doesn't always work bud
     
  3. Obey 1

    Obey 1 Well-Known Member

    i know but the discs were run in as normal then not long after shaking again so had skimmed then ran again then came back so im thinking something else a problem suspension or not seated correctley and having run out issues
     
  4. I'd start by ruling out issues one by one, based on price (Cheapest first).

    1. Are the disks warped ? - You can check if the disk is warped with a simple DTI set up on a flat table or simply suspend a pointer over a flat table so its just missing the disk surface then spin the disk through 360 degrees. If the gap between the pointer and disk changes at any point you have warped disks (most Engineering firms will be able to test this with a DTI on a flat table and tell you the exact variation - the cheap "pointer" solution just informs you if they are warped or not).

    2. If not warped, check all the mating surfaces for any contamination. Even the smallest piece of grit on the hub may throw the disks out.

    3. Caliper set up - Strip everything down. Clean out the groove in the pads (if you have one) and make sure all the caliper pistons are free. Make sure everything is spotless (including caliper mounting points) as you refit and double check all bolts are tight.

    4. Check all bolts on the suspension, drop links, Anti roll bar etc, etc, etc. Also try jacking up the car and try pulling the wheel/tyre (MOT style) to see if you have any movement issues.

    5. Book it in at a specialist and wait for the bill.

    6. Don't bother braking - last option as it could be the most expensive route :)

    Good Luck :)
     
  5. Obey 1

    Obey 1 Well-Known Member

    Was speeking to guy today when picking up a spare wheel he knows brian at cams to he said sounds like a piston sticking
     
  6. HAGGY

    HAGGY Admin

    id of thought a piston sticking ,, woud result in the car pulling to one side not shaking , have you checked the wheels are balanced ! or check tyres for bulges or wheel damage ! just some more options dave really !
     

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