ratz
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Post by ratz on Jun 3, 2016 9:36:48 GMT
Morning All
Hoping someone can help with what may or may not be an issue.
Recently bought a 2006 Mk3 Sport which had new disks & pads 2k miles ago (but almost 12 months ago in time). One of the front calipers was clearly sticking because the disk was mad hot just from normal use, so I've bought & fitted refurbed calipers from Autolink.
In addition I felt the rears were getting pretty hot from relatively light/normal use - i.e. not nailing it, plus there was excessive brake dust build up on both rear wheels (much more than the front). So again, I've bought refurbed calipers from Autolink and fitted them.
My concern is that all the brakes still seem to get pretty hot (my only measures are touching the disks & the fact they smell hot) in 'normal' use compared to the Mk1 I used to have. My journey this morning was predominantly motorway with no traffic / heavy braking & 40mph dual carriageway again with no heavy braking. There's no sign that they're sticking, i.e. car rolls very easily, handbrake is engaged after only 5 clicks, no binding noises, brakes aren't grabby.
Question is am I just being paranoid?
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Post by atlex on Jun 3, 2016 10:58:24 GMT
Just one brake from 60 to 0 will dump a lot of energy into heat - imagine the fuel you used to get to 60 in the first place. unless the car is driving badly I don't think there is anything wrong.
First thing is to compare fronts to each other and rears to each other. unless you put one side or the other through a puddle they should both have similar temperatures if they are working correctly. unless you're driving outside the limits of the pads, it should be fine.
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Post by atlex on Jun 3, 2016 11:03:02 GMT
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Don
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Post by Don on Jun 3, 2016 11:03:21 GMT
Sounds like you've pretty much ruled out sticking with the standard 'roll' test. The discs on my mk3 are hot to the touch after normal braking. Not sizzling hot like a stuck caliper would cause, but certainly warm enough.
Are they even? If both fronts & both rears are similarly hot and they're not so hot that the tip of your finger blisters, then I reckon you're fine. Perhaps they are just more efficient than your MK1 brakes & with increased efficiency comes increased friction and thus increased heat. Could just be that you just have very dusty pads.
If it's rolling freely before, during, and after driving, not pulling to once side, and not showing any other symptoms I would just accept that you have efficient brakes and be happy.
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ratz
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Post by ratz on Jun 3, 2016 14:32:03 GMT
Thanks for the responses everyone.
Just tried to do a control test to gather more information. Rolled to a halt after one stop from 40-0 and a 10 mile run at 70mph. Front disks were what I would expect, rears were hotter, could only touch for half a second. Same test after a further 5 miles at 30mph and very light braking, fronts are now 'warm' but rears are still hot. Side to side comparison is even at least across each axle. They are not getting sizzling hot even after I've been out for a blast down lanes.
As has been said, in the absence of other symptoms I just need to drive it and see - not least because I'm not sure what else could be wrong.
Thanks again for the fast feedback, much appreciated.
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Don
Chats A Bit
Posts: 146
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Post by Don on Jun 3, 2016 15:21:25 GMT
Back much hotter than the front sounds a bit odd. I don't know enough about brake bias to start dishing out advice so I can only suggest you give someone like Rodders or Blink or Skuzzle a phone and ask them if they have any ideas.
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Post by superdan on Jun 3, 2016 20:12:13 GMT
My other car is a Skoda Octavia VRS, I'm led to believe that on these somehow at light braking (only) it actually brakes the rear first so you get less weight tranfer and better ride quality. Does a mk3 do this?
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