front brake vibrations

[gmeddy]

hi.
I recently changed the rubber boots on my left hand side CV joints, and since then i've had bad vibration when i brake, the higher speed, the worse.

and just recently it's also started making a scrubbing noise in that brake as well.

i'm pretty sure it will need new pads, as i've never done them before that i remember, and i've had it for 10 years...

any ideas on the vibration?

thanks

[IHblarp]

sounds to me like a warped rotor, its kinda weird that it would start after doing cv work though. Are you sure you tightened the lugs equally? I have heard of unevenly torqued lugs causing warped rotors.

10 years on the same pads? probably not a bad idea to change those pretty soon

[offroadohio]

Did you have the rotor off when you did the boots? If you didnt clean the back of the rotor and the hub surface its possible the rotor is not seating flat on the hub. I see this all the time when shops do brakes and rotors and dont surface the hub.

Most likely is a warped rotor though.

[blade]

ya it sounds like the rotors when you are brakeing do you do it hard or are you easy on it because i have gone through two sets of rotors because of hard brakeing so if you brake hard it might be an iea to ez off the brakes.

[gmeddy]

thanks for all the great replies.
what i did was i pulled the whole thing out. the disc off and the whole wheel out, because i couldn't get the centre nut off to get the CV joint out of the wheel.
so i actually unbolted the whole wheel setup out of the car, off the suspention and steering and brake caliper ect.

like i said, it was fine and dandy before i did that work.

i've taken off the wheel to have a look at the brake disc a couple of times, and it's always still there when i drive again.
i can't remember how i went with my torking the nuts when i initially put it all back together.
surely i'm not strong enough to warp the rotor by hand???

[offroadohio]

doesnt take much to warp a rotor if it was torqued out of sequance.

You may want to check the hweel bearing aswell. I had a VERY bad pulsation/vibe when braking and it turne dout my wheel bearing was bad.

If oyu got that axle nut to move at all ti could have lossened the bearign enough.

[splatterdog]

Rust/debris between hub-rotor causing runout and/or wheel torque. Any wheel bearing play now? Hub nut could be loose if there is. Maybe you just bent the rotor shield.

Machining or replacement of the rotor will likely be needed, plus what ever else it may be ready for after 10 years. That's a pretty good run for brakes. How many miles?

[gmeddy]

to be honest i'm just guessing what you mean by these terms. hub and rotor. is the disc that comes off called the disc? or rotor?
the hub must be what the wheel studs are attached to yeah?

i never got the pin out of the nut, so i didn't even move that.

play in the bearing? where is the bearing?
how would i know if there was play? anything i could do to test?

as far as i know, it has not had brake pads done in the 200,000km i've been driving it.
it had 60,000 on it when i got it, for the neat price of 2,900. not bad eh.

[offroadohio]

Not trying to be mean but it sounds like you may want to take it to a shop to ahve it looked at. Brakes are not something a person should mess with that doesnt know what a rotor is.

But for informational puproses. the "disc" is the rotor. And yes the hub is what the studs are in. The hub presses into the wheel bearing which inturn presses into the spindle.

[ARCHINSTL]

gmeddy -
Again, not trying to be ornery - but good places to peruse would be the FSM available here and the parts catalog available as a sticky on the Parts Forum here. The latter gives exploded drawings of just about everything, which are quite helpful for nomenclature and parts recognition.
Tom M.

[keith]

Not to be too anal, technically it's a steering knuckle, but many people do call it a spindle, not sure why though.

[splatterdog]

Not to be too anal, technically it's a steering knuckle, but many people do call it a spindle, not sure why though.

Everything pre-FWD had a spindle that was almost always integral with the knuckle. Old habits can be hard to break....

[marquiess]

I had this problem also and it turned out being the track control arm bushings where they join the hub assembly.

[gmeddy]

where i live (Kununurra West Australia) you save yourself thousands - literally - if you can do things yourself.
so far i've done timing belt, including idler pulley, cam shaft seal, water pump, fuel pump, alternator bearings, rear wheel bearings, CV boots, valve clearances, and many other little tune ups, including installation of a weber.
Kununurra mechanics know how to charge like you wouldn't believe.
possibly because not too far away from town is the biggest diamond mine in the southern hemisphere and they assume everyone is earning the kind of money the miners are getting. unleaded for example is currently $1.60 per liter. while further down the road (hundreds of kms further for the fuel tankes to drive) the fuel price is 30c cheaper p/l.

i'd love to just give it to a proffesional mechanic to do, and have the peace of mind. but i'm affraid i just cant afford it.

[ARCHINSTL]

Wow - that AUD 1.60/litre is about USD 6.00/gallon!
Tom M.