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29th March 2022, 14:51 | #11 | |
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MG ZT 260 #442 in XPower Grey Join Date: Mar 2022
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Or at least that's how it was done on Girling sliding caliper brakes (the Colette) on which all sliding calipers are based. Still have no explanation about how pads can wear at the top and bottom unless the pad backplate is bent.
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MG ZT 260 #442 in XPower Grey and Cupra Formentor Hybrid VZ2 |
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29th March 2022, 15:51 | #12 |
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55 cdti tourer slush box executive grill Join Date: Feb 2022
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Cheep discs can cause this hard /soft spots ,then you get uneven wear in the pads which accelerate the wear in the discs then you fit new pads and they ride on the high spots and the low spots get rusty because the pads aren't touching the low spots and so it continues until you fit new discs and pads and it all starts over again
When I was spannering back in the 80s you could buy abrasive pads which cleaned the discs up a treat don't seem to be able to buy them now |
29th March 2022, 15:53 | #13 |
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rover 75 club se Join Date: Apr 2011
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spot on.100 % correct. provided the springs sit correctly within the piston and do not exit partially , or try to , once pressure is released. ...
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29th March 2022, 18:28 | #14 | |
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MG ZT 260 #442 in XPower Grey Join Date: Mar 2022
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When the various materials initially used as asbestos substitutes worked from a friction point of view, they weren’t great at heat transfer so discs warped, brake judder ensued and so abrasive pads were introduced to machine the disc true again. And discs lasted about as quarter as long as before. Friction materials evolved to be less abrasive, but there’s still an element of machining going on with associated shortened disc lives.
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MG ZT 260 #442 in XPower Grey and Cupra Formentor Hybrid VZ2 |
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30th March 2022, 21:22 | #15 | |
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Most of the folk in this thread are talking about rubbish and badly made pad assemblies. These anomalies cause problems that never occurred with the original pads supplied by Rover.----- |
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30th March 2022, 22:05 | #16 |
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Never had the problem myself, but, when the V6 stood out on the front drive for twelve months, the disc’s rusted slightly. I took the wheels off, and ran some brake cleaner on a piece of rag around each side of the disc’s first, after removing the whole calliper. I then got some emery cloth and cleaned up the disks in turn. I gentle used another piece of emery cloth to rub the brake pads on to remove any rust that was on the disc that had transferred to the pads. They have performed very well ever since. . Now the diesel which has been in the garage for the last one year nine months, there was a leak in the rook, caused by a stupid neighbour poking a piece of piping through the rear of the roof letting the rain in. The three disc’s are still shiny, good air flow in the garage, but the one where the leak was is a little rusty. I have had the car up and down the drive to the garage to get rid of the rust. It is not perfect, but will get the same treatment as the KV6. By the way, the disc’s are Pagid all round. I recommend them.
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1st April 2022, 11:18 | #17 | |
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