Heather558

Hello,

My 08 ISF has 33k and the front pads are at the end of their days. I hear noises when I'm not even hitting the brakes and when I got my emissions done the dude told me they were almost completely gone Anyways, I'm getting ready to order the pads ( I believe from LexusPartsnow.com) and my dad tells me I can wait on the rotors. Has anyone else done this or is it a MUST to do the rotors at this time too? I'm driving the car to Florida in a couple of weeks so I'm going to have the pads replaced by then.

A friend of mine called his friend who works for Lexus and he claimed the rotors must be changed too. He went on about why but I was lost at that point.

Has anyone ordered from lexuspartsnow.com? I'm sticking with the same pads....

I must say I trust my dads opinion as he has been in the auto industry for over 30 years (drag raced, restores Chevelles, and is a huge car fan.. He just picked up some Mercedes with 700 hp. He likes to tell me he'll smoke me but I think the F could handle it )

Any advice is appreciated

cremaster

iTrader: (1)

from my experience, (and from what my trusted mechanic has told me in the past), it depends on how worn the rotors are. yeah, sounds like an obvious comment. if the rotors have already been resurfaced or are just really worn, it's probably best to just replace them when you replace the pads bc it's not that much more, labor wise, to just replace them while everything is taken apart.

that's my simple contribution; i'm sure others will have more technical and or useful info

SeanGTS

iTrader: (1)

Measure them and inspect them, if they're within spec, leave them, if not, replace them.

Ask them for the micrometer measurements, if the fronts are under 28mm they will need replacement, I believe the rears are 26mm... The min. runout is stamped on the rotors.

Bulls23337

iTrader: (2)

Only way to know for sure is to get them measure as SeanGTS mentioned.

DCoolBeans

^ That is on point. They need to be measured to see if they need replacing. If not then you'd be just wasting your money on new rotors

4everkidd

iTrader: (2)

Also make sure you measure them at the point at which the pads make contact.. Seems like common sense, but in my experience common sense isn't too common

lobuxracer

iTrader: (2)

Odds are no, they're fine and your dad is right. Measuring them will confirm right or wrong. Numbers above are correct. 28mm is minimum thickness. Total wear is 2mm from 30 to 28mm. So, measure, take the mileage and divide by the amount gone - for example - you measure 28.7mm and you've got 33,000 miles:

30mm-28.7mm=1.3mm and 28.7mm - 28mm=0.7mm, so

33,000/1.3mm=25,385 miles per mm.

Then multiply by the 0.7mm left - 25,385*0.7=17,770 miles of useful life left.

Would you really want to throw away a rotor with 40% of its service life left? I'm too cheap for that...