bosmet

took the car to the dealer for some noises from the front brakes. they found nothing but recommended to replace the rear pads+sanding the rotors. shows how much i know about cars cause i just said ok. they told me if i didn't do it i would be complaining about sqeaks.

now two days after getting the car back i hear it sqeaking 95% of the time.

is it time to raise holy hell?

PACman

Sanding rotors? Is that just another way of saying resurface?
Dealer work is usually warrantied. If you have time, bring it back.

CGTSX07

wait...so you heard noises from the front brakes, but they recommended that you replace the rear brakes?

LukeaTron

You should lightly sand the rotors when you replace the pads. It removes the built up material from the old pads and helps the new ones bed properly and more quickly. It is not totally necessary however.

I'd take it back to the dealer and have them put anti-squeal compound on the back of the pads. If you just tell them that it's squeaking, that's probably what they'll do because it's the easiest fix.

bosmet

i heard sqeaks from the back too but thought it was too soon to replace them but apparently not. 32k miles. i guess that's not too bad right?


the front had a horrible metal to metal sound that went from intermittent to constant to gone by the time the dealer got it. so i'm sol on that because they inspected it and found nothing in all wheels. i swear it was a godawful screeching noise when it was there and this was the second time it happened. this time i noticed it was right after a wash. don't know if that makes a difference or not.

bosmet

i believe what they did was resurface the rotors

MrHeeltoe

iTrader: (1)

Sanding rotors...yeah I am not a big fan of that. You just need to do some really aggressive bedding to burn in the new pads and freshen the surface on the rotors. If that doesn't work you may need to try some different pads.

The anti-seize lube on the back of the pads does reduce the potential for making noise, but it sounds like you got a little more serious squeaking than that will cure.

Marcus

bosmet

what i would like to know is did i really need that resurfacing or did i get suckered?

LukeaTron

Generally a resurfacing is only needed if you have minor rotor warpage. Were you getting any shimmy or pulsation in the peddle when braking?

jlukja

^^ or if there was uneven wear on the rotors due to the old pads.

LukeaTron

Ah yes, this is true.

bosmet

i was told that they recommend changing pads at 3.5m and mine were 1.5m

MrHeeltoe

iTrader: (1)

They always measure from a wear indicator tab which is the REAL time that you need pads replaced.


Pads start with about 10mm of material, plus about 2mm for the wear indicator. When they say you have 1.5mm left you really have 1.5 +2 which is 3.5. When they say you replace at 3.5mm the pads will actually have 5.5mm left.


The 2mm is a safety cushion. So they say to replace pads anywhere from 0 to sometime 4 mm! They are trying to get more work. So basically if they say you need pads and they say you have anywhere north of 2mm left, keep waiting until you hear the indicator squealing or until you feel like the braking is being compromised.

Marcus

nbtx

You were given the old "you need brakes" doodah. All vehicles need brakes; but very few need new pads or other repairs. The dealer enriched his coffers and you missed getting full use of the pads they replaced. Next time wait for the squealing noise from the wear indicators, then replace the pads.

bosmet

here is the quote from the invoice i received

"verified sqeal noise from rear brakes. inspected brakes found rear wear sensor hitting brake rotor. forund rear brake lining= 1.5mm
rec. to replace rear brake pads and resurface rear rotors."

i'm confused as to what "rear brake lining" means. is that the sensor part. they state that the wear sensor was hitting the rotor.