Alright my mechanic friends... I got yet another brain buster for you.
So I just did the brakes on my LX470. However, we are having an issue with one of the 4 corners (right rear) overheating. And just to recap...we did LOADED calipers with new pads, brackets, and hardware included, all of the slide pins and everything were all lubed up like they should be. Along with new rotors, new parking brake shoes, and new stainless steel brake lines (instead of the original rubber hoses).
When we first finished the install, it drove fine. No noticeable problems, brakes actually worked better than we've ever seen them before. We did some hard stops, could smell the heat, but figured that was normal break-in and nothing much to worry about. But we took a laser gun that measures temp, shot each of the 4 rotors. The other 3 were totally fine and consistent with each other (roughly 120 degrees), but the right rear was showing over 200 degrees. We took the rotor to a shop and had it spun on a lathe, and it was VERY badly warped. So we pretty much figured that it was probably a defective caliper that was probably getting stuck, not releasing like it should, and dragging causing the excessive heat...which in turn probably caused the new rotor to warp. So we got a replacement caliper and another rotor. Put them on last night, drove it and did some more hard stops and then checked the temps, and they were all good and consistent with each other.
So horray! Problem solved we thought! But then after driving it today, just normal driving, no hard stops... and the rotor was showing 240 degrees! I'm out of ideas! Maybe the new brake line is defective and has an internal defect/restriction we can't see causing it to have problems with releasing hydraulic pressure? I put the old OE brake line on and originally was fixed but the problem is back But I don't know...I'm really just grasping at straws at this point! We ruled out the possibility of it being parking brake shoes dragging because of where on the rotor we are measuring the heat, plus the adjustment was set back a little too loose if anything, because there wasn't much tension when you pull the hand brake. Does anybody else have any ideas? What else it could possibly be?
I have since replaced the caliper with a newly refurbished Raybestos caliper and have gone thru 3 rotors so far. Part of the problem is likely the Napa rotors that are made in China as one or more have been not true out of the box. Although the other rear Napa rotor is just fine. This whole thing has been very frustrating and causing me to not be able to take the LX on a family vacation to the beach.
Any ideas friends?
So I just did the brakes on my LX470. However, we are having an issue with one of the 4 corners (right rear) overheating. And just to recap...we did LOADED calipers with new pads, brackets, and hardware included, all of the slide pins and everything were all lubed up like they should be. Along with new rotors, new parking brake shoes, and new stainless steel brake lines (instead of the original rubber hoses).
When we first finished the install, it drove fine. No noticeable problems, brakes actually worked better than we've ever seen them before. We did some hard stops, could smell the heat, but figured that was normal break-in and nothing much to worry about. But we took a laser gun that measures temp, shot each of the 4 rotors. The other 3 were totally fine and consistent with each other (roughly 120 degrees), but the right rear was showing over 200 degrees. We took the rotor to a shop and had it spun on a lathe, and it was VERY badly warped. So we pretty much figured that it was probably a defective caliper that was probably getting stuck, not releasing like it should, and dragging causing the excessive heat...which in turn probably caused the new rotor to warp. So we got a replacement caliper and another rotor. Put them on last night, drove it and did some more hard stops and then checked the temps, and they were all good and consistent with each other.
So horray! Problem solved we thought! But then after driving it today, just normal driving, no hard stops... and the rotor was showing 240 degrees! I'm out of ideas! Maybe the new brake line is defective and has an internal defect/restriction we can't see causing it to have problems with releasing hydraulic pressure? I put the old OE brake line on and originally was fixed but the problem is back But I don't know...I'm really just grasping at straws at this point! We ruled out the possibility of it being parking brake shoes dragging because of where on the rotor we are measuring the heat, plus the adjustment was set back a little too loose if anything, because there wasn't much tension when you pull the hand brake. Does anybody else have any ideas? What else it could possibly be?
I have since replaced the caliper with a newly refurbished Raybestos caliper and have gone thru 3 rotors so far. Part of the problem is likely the Napa rotors that are made in China as one or more have been not true out of the box. Although the other rear Napa rotor is just fine. This whole thing has been very frustrating and causing me to not be able to take the LX on a family vacation to the beach.
Any ideas friends?
