Front Brake Pads P400 73,000 miles
Mudding
Joined: Nov 2006
Posts: 193
Likes: 67
From: Tacoma Wa
During over 230,000 miles on my lr3, I had no issues with putting new pads onto rotors slowly growing the lip. No functional need to shave it off in my experience.
Mudding
Joined: Nov 2006
Posts: 193
Likes: 67
From: Tacoma Wa
For 4 rotors, pads, wear sensor(s) and any associated hardware that's not too bad but you can probably do a bit better. Maybe not.
I was looking for any sign of a lip on the rotors but the seem completely flush with the edges. Boiler plate LR advice is pads and rotors at the same time but I think this is more from the standpoint of doing it just right so they don't have any do-overs related to warped rotors and the like.
I found it interesting (I'm something of a nerd) that the inner front pad was markedly more worn than the outer. This was the same on right and left so it's clearly a normal thing. The wear sensor is positioned on that pad too. I wonder why the wear pattern is thus. Something related to centripetal force and lateral load under turning is my guess.
Edit: A dumb guess. Possibly just more force on the piston on the inner aspect.
I was looking for any sign of a lip on the rotors but the seem completely flush with the edges. Boiler plate LR advice is pads and rotors at the same time but I think this is more from the standpoint of doing it just right so they don't have any do-overs related to warped rotors and the like.
I found it interesting (I'm something of a nerd) that the inner front pad was markedly more worn than the outer. This was the same on right and left so it's clearly a normal thing. The wear sensor is positioned on that pad too. I wonder why the wear pattern is thus. Something related to centripetal force and lateral load under turning is my guess.
Edit: A dumb guess. Possibly just more force on the piston on the inner aspect.
Super uneven wear seems very unlikely to be "normal" or as planned.
Somewhere around 200k I replaced both rear calipers on the 07 LR3. Any time I do pads I remove and lubricate the sliders.
Also, the exactly aligned photo you showed of the rotor would basically continue to look the same even when the rotors are worn beyond usability because the lip would remain and hide how it looks or feels to the hand at the edge. Even the perfect angle photo is hard to see the lip that occurs. I have some rotors now where the "dimpled" and "slots" are almost worn to flat LOL. Not really, but I think it might be 50% of their depth which is WELL beyond spec. I'm not driving it much now so I just haven't gotten around to it even though I have the full kit on a shelf.
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TReK
Joined: May 2021
Posts: 2,559
Likes: 3,623
From: Kirkland WA
Normally, a significantly uneven pad wear means the sliders aren't well lubricated or some other reason for the pressure to not equalize. I have had both occur, nearly even wear as well as very uneven. The worst was when it was determined that I needed a new caliper or to rebuild it because the piston wasn't as fluidly moving as it should.
Super uneven wear seems very unlikely to be "normal" or as planned.
Somewhere around 200k I replaced both rear calipers on the 07 LR3. Any time I do pads I remove and lubricate the sliders.
Also, the exactly aligned photo you showed of the rotor would basically continue to look the same even when the rotors are worn beyond usability because the lip would remain and hide how it looks or feels to the hand at the edge. Even the perfect angle photo is hard to see the lip that occurs. I have some rotors now where the "dimpled" and "slots" are almost worn to flat LOL. Not really, but I think it might be 50% of their depth which is WELL beyond spec. I'm not driving it much now so I just haven't gotten around to it even though I have the full kit on a shelf.
Super uneven wear seems very unlikely to be "normal" or as planned.
Somewhere around 200k I replaced both rear calipers on the 07 LR3. Any time I do pads I remove and lubricate the sliders.
Also, the exactly aligned photo you showed of the rotor would basically continue to look the same even when the rotors are worn beyond usability because the lip would remain and hide how it looks or feels to the hand at the edge. Even the perfect angle photo is hard to see the lip that occurs. I have some rotors now where the "dimpled" and "slots" are almost worn to flat LOL. Not really, but I think it might be 50% of their depth which is WELL beyond spec. I'm not driving it much now so I just haven't gotten around to it even though I have the full kit on a shelf.
I didn’t lubricate the guide pins. I read up on it and it seems that with metal bushings on them there is a potential downside. As I’ve not encountered any issues in 73k I figure I’ll keep going as is.
I don’t know how far the rotors are when new. That would be useful data.
front and rear I see no signs of wear on rotors. I have no doubt I’m probably missing something but I’m happy to take any associated risks.My bet is that they are minor and at worst will mean a
more rapidly reducing pad I guess I’ll find out in 40000 miles
Give how close the new pads were to the old rotors following initial installation I can’t see any possibility that new rotors could be much fatter.
Whatever it is Im missing is subtle.
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