ryanmackk

iTrader: (1)

Please help me determine the cause of my high speed vibrations as best you can.

My 2006 begins to shake at medium braking power at high (freeway) speeds.

Things to note:
1. Feels like the vibrations originate from the front
2. Car in otherwise good mechanical condition
3. I greased up my pads to eliminate brake squeal (no, not the part that touches the rotor)
4. Mechanic found warped rotor bolts in rear wheel (told me it happens from impact)(pre-owned vehicle)

Is it possible that the brake pad grease is too slippery and causing the pads to slip too much?

Is it possible the front bolts are also warped and are the cause of these vibrations?

Carfreak70852

iTrader: (2)

Warped rotors. Replace them. They're cheap.

Edit: And WTF is a rotor bolt? Lug nuts? I have never heard that referred to as a "rotor bolt"

pyshin

iTrader: (14)

^^^ x2. Quality replacements: http://centriccatalog.com/

Find part number, copy/pasta in Amazon search, order rotors. Done.

And "warped rotor bolts", your mechanic is a retard.

The only thing I could think of being referred to as a "rotor bolt" are the ones found from factory on the front rotors: https://my350z.com/forum/7149681-post14.html

terrasmak

iTrader: (8)

I'm seriously at a loss of words

Carfreak70852

iTrader: (2)

Only reason I think he is referring to the lug nuts is his comment saying "it is from someone using an impact" which generally is done with lug nuts/ROTOR BOLTS (lol)

Syner

rotors like carfreak said.

lol yup

also lol @ rotor bolts. OP, are you sure you're taking your car to an actual mechanic?

KornerCarver

iTrader: (2)

It might be a good idea to replace all four rotors as well as the pads. I would steer clear of the mechanic who has had experience with "rotor bolts".

ryanmackk

iTrader: (1)

lol. Yeah, he used "rotor bolts"..... I'm not sure why. Maybe he is used to dealing with lay-people so he used that word on me lol.

Anyways....the general consensus is that the rotors are warped.... how the hell does that happen? I thought it only happened under extreme heat and then rapid cooling?

I don't remember having this issue right when I bought the car, and I really can't think of a circumstance that would warp them... I don't even track the car.

ryanmackk

iTrader: (1)

Lol, shut up, I'm not a mechanic nor an engineer. I'm learning as I go.

ryanmackk

iTrader: (1)

Anyone think it may be due to bent caliper pins?

Syner

No. We all said what it is.

Carfreak70852

iTrader: (2)

They warp over time. Coming off of an interstate ramp at 80 and slowing to 0 generates a lot of heat. More than you probably think. They just warp. It isn't something you did wrong. The rotors are probably older and need replacing anyways.

Syner

This.

KornerCarver

iTrader: (2)

Rotors just warp over time. I just replaced all four rotors on my Grand Caravan because of the vibration issue. After replacing the rotors and pads, the vibrations are gone. Smooth braking now.

ryanmackk

iTrader: (1)

Okay, great, thanks for the advice guys (and education, as it seems)

ryanmackk

iTrader: (1)

Totally forgot to update this and not sure if anyone is subscribed, but it was due to a lack of grease on the caliper retention pins. I pulled them out and greased them up....braking is buttery smooth.

So yeah...not warped rotors...syner

Syner

single me out because i'm the only one who said it was warped rotors... (the most likely cause based on your description).

bertalert87

iTrader: (1)

LOL warped rotor bolts, OP hope you got your brake issue sorted out by another mechanic. Could be uneven pad deposits or a warped rotor.

Carfreak70852

iTrader: (2)

+1000

guitman32

iTrader: (15)

Not to mention that his solution doesnt make any sense.