Brakes question...
#1
#2
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The short answer is 'no'. Then comes the 'but'.......
Assessment of disc (rotor) condition should include:
1. thickness (discs wear through friction with the pads)
2. corrosion (rust on the rim is regular but surface pitting indicates a problem)
3. distortion (pushes pads back meaning further pedal travel to apply brakes)
4. uneven wear (on an individual disk or between axle pairs)
If the disc surface isn't flat, the pad can't contact the full surface area and braking efficiency is reduced. Always replace discs as an axle set, never just one side.
When checking discs and pads, you should also inspect calipers for freedom of piston movement, damaged seals or corroded pistons.
As a guide only, I generally replace discs every three to four pad changes. Think safety and, if in doubt, replace. If you're just not sure then post some photos.
Graham
Assessment of disc (rotor) condition should include:
1. thickness (discs wear through friction with the pads)
2. corrosion (rust on the rim is regular but surface pitting indicates a problem)
3. distortion (pushes pads back meaning further pedal travel to apply brakes)
4. uneven wear (on an individual disk or between axle pairs)
If the disc surface isn't flat, the pad can't contact the full surface area and braking efficiency is reduced. Always replace discs as an axle set, never just one side.
When checking discs and pads, you should also inspect calipers for freedom of piston movement, damaged seals or corroded pistons.
As a guide only, I generally replace discs every three to four pad changes. Think safety and, if in doubt, replace. If you're just not sure then post some photos.
Graham
#3
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You didn't mention how many miles are on the car or past brake maintenance.
FYI: I replaced my rotors, calipers, and pads shortly after I bought mine....but the rotors were heavily worn and should have been replaced a long time before. That was about 103K I think. I upgraded to drilled totors, better calipers, and ceramic pads. I love 'em.
FYI: I replaced my rotors, calipers, and pads shortly after I bought mine....but the rotors were heavily worn and should have been replaced a long time before. That was about 103K I think. I upgraded to drilled totors, better calipers, and ceramic pads. I love 'em.
Last edited by oldjaglover; 03-10-2012 at 01:19 PM.
#4
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oldjaglover,
Which brand of components did you use.
I'm getting ready to change pads and rotors - probably EBC drilled and slotted plus EBC Redstuff pads. I don't think I need new calipers.
I have an '05 XK8 with 85K miles. OEM brakes have always seemed a bit soft to me.
Thanks for the additional information.
John
Which brand of components did you use.
I'm getting ready to change pads and rotors - probably EBC drilled and slotted plus EBC Redstuff pads. I don't think I need new calipers.
I have an '05 XK8 with 85K miles. OEM brakes have always seemed a bit soft to me.
Thanks for the additional information.
John
#5
![Default](/forum/images/icons/icon1.gif)
oldjaglover,
Which brand of components did you use.
I'm getting ready to change pads and rotors - probably EBC drilled and slotted plus EBC Redstuff pads. I don't think I need new calipers.
I have an '05 XK8 with 85K miles. OEM brakes have always seemed a bit soft to me.
Thanks for the additional information.
John
Which brand of components did you use.
I'm getting ready to change pads and rotors - probably EBC drilled and slotted plus EBC Redstuff pads. I don't think I need new calipers.
I have an '05 XK8 with 85K miles. OEM brakes have always seemed a bit soft to me.
Thanks for the additional information.
John
#6
#7
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Many professional mechanics will automatically replace rotors because they don't want any repair "come backs." They just don't want any hassles. And, the rotor sales bring in additional profit--with the customer paying dearly.
My original brakes lasted 59K, and my rotors were resurfaced. The machine shop said they had one turn in them, and would need replaced next time. The micrometer tells the truth.
My original brakes lasted 59K, and my rotors were resurfaced. The machine shop said they had one turn in them, and would need replaced next time. The micrometer tells the truth.
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