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Yo.. been noticing this problem lately and I'm wondering if its just my rear breaks needing new pads/rotors or if my suspension is shot (which would suck.)
Anyway, I've got a b14 sentra se, with tein ss'es +14" rims & ad22's up front ( both recently put in). Lately braking hasn't been very good, the car kind of does a lurching back and forward thing at low speed breaking, and if I'm breaking at high speeds (60 mph + ) it vibrates pretty wildly and the wheel bucks about a bit (have to hold on for dear life.) Adjusting the rear damper settings help out a lot (making it stiffer.)
Mileage is 89k, and rear brakes have never been serviced ever (that I know of) and got the car with 40k. Also, haven't aligned the car since I had the rims installed... that might be it, and before I was riding on 17". I hope.
Also I heard a weird noise coming from the rear-driverside wheel onetime after using the A/C (will post video later.)
that is classic brake rotor run out. get new rotors for the front and rear, as well as new rear pads if needed. clean off the hub surface of all rust as well as the machined part inside the wheel.
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it can be serval things 1.) rotors or brake pads 2.) tires 3.)front end alignment
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my front rotors have less than 10,000 miles on them.. have I worn them out already? I hear some faint metal brushing sounds in the front they've always been like that, but I think my pads are carbon fiber..
another note.. my front driver side coilover seemed to have adjusted itself to the zero setting.. (right side at 8).. I think I need an alignment at least..
if you or a shop uses a impact wrech on the lug nuts, a very good possibility that the rotors will warp, old ones or some right out of the box, it doesnt matter. they are only suposed to be torqued to 100 flbs.
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91 ser: short shifter, sparco shift knob pedals steering wheel, aem WAI, greddy sp catback, timing, agx's, eibach springs, b14 wheels, jvtr header, ground kit
98 se: pop charger, timing, custom 2 1/2" cat back magna flow muffler, exedy stage 1 kit, fidanza flywheel, need a header and a high port intake cam
00 x-terra: 2 1/2" lift, 31s, air lockers, bumper
If your toe is off, even a little it can cause weird issues under braking. It will be more exaggerated on less then smooth pavement.
It can manifest itself in several ways, one being a shaking sensation or brake steer, where the car under braking dives in one direction or the other.
I always found a shake during braking is caused by rotors being warped. On occassion a severely worn suspension part, but never just an alignment being out of spec. Knowing how things usually go for me though, I'll have one come in the shop this week shaking with only alignment issues.
my front rotors have less than 10,000 miles on them.. have I worn them out already? I hear some faint metal brushing sounds in the front they've always been like that, but I think my pads are carbon fiber..
another note.. my front driver side coilover seemed to have adjusted itself to the zero setting.. (right side at 8).. I think I need an alignment at least..
not worn out by any means. but if you beat on your brakes they will warp. it can happen the day after you replace your rotors. and since our rotors are very thin it very easy for them to warp.
the metal sounds you are hearing are most likely the splash sheild hitting the rotors. when you are installing rotors you grab the rotor when you put it on the hub to turn the wheel so you can get better access to the bolts for the caliper.......trust me you do it........this bends the splash sheild into the rotor causing the scrape sound (i do it every day lol) just use a small screw driver and pry it away from the rotor, it will go away i promise.
find a local shop and see if they will toss your front rotors on a "brake lathe" if you bring them in. they will machine the rotor dwn taking no more than .01 of an inch of metal off of the rotor making it true again.
not worn out by any means. but if you beat on your brakes they will warp. it can happen the day after you replace your rotors. and since our rotors are very thin it very easy for them to warp.
the metal sounds you are hearing are most likely the splash sheild hitting the rotors. when you are installing rotors you grab the rotor when you put it on the hub to turn the wheel so you can get better access to the bolts for the caliper.......trust me you do it........this bends the splash sheild into the rotor causing the scrape sound (i do it every day lol) just use a small screw driver and pry it away from the rotor, it will go away i promise.
find a local shop and see if they will toss your front rotors on a "brake lathe" if you bring them in. they will machine the rotor dwn taking no more than .01 of an inch of metal off of the rotor making it true again.
machining rotors is a waste of money imho. our shop will not do it, because if we machine them they allmost always come back with the same exact problem. once you get them hot and warp them, its easier to warp them again. even after machining them... rotors are just about as cheap as having them turned anyways. go get some new rotors.
new rotors and pads and rotate and balance your wheels. the balancing of the wheels should stop the shaking. like the other members said, change the rotors, clean the brake pad debris and rust behind the wheel and install new products. problem should be fixed.
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1992 Nissan NX/
1995 Ford Mustang GT/2002 Nissan Sentra SE-R
machining rotors is a waste of money imho. our shop will not do it, because if we machine them they allmost always come back with the same exact problem. once you get them hot and warp them, its easier to warp them again. even after machining them... rotors are just about as cheap as having them turned anyways. go get some new rotors.
I disagree. If you have an on-car lathe, turning the rotors works great.
It even accounts for hub runout, making it a truly flat surface, which a brand new rotor will not.
If I weren't doing my own labor, I'd just buy new rotors - 2 hours labor to machine rotors is usually a lot more than getting rotors and putting them on yourself.
As for brake pulsation due to alignment, I've never seen or heard of anything like that.
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Originally Posted by redcap3000
my front rotors have less than 10,000 miles on them.. have I worn them out already? I hear some faint metal brushing sounds in the front they've always been like that, but I think my pads are carbon fiber...
Jack the front of the car up and turn both front wheels with your hand. If either is hard to turn, or the pads are worn unevenly (from inside/outside of the same wheel, or from wheel to wheel,) look into a caliper.
