Just the way they're made. Metalmasters like at least one 'warm-up'
stop when dead cold. They don't work well unless slightly warm but in
exchange, they resist glazing and 'bite' better at higher temperatures
like you'd find on track. The Deluxe are a different compound more
suited for street driving, but are fine for occasional track use as
well. At least, that's what I hear.
(Never ran Deluxes ...)
quote from BMW North Scottsdale in Az - wear sensor, pads and rotors
for all four wheels on a 98 M3.....$1067 + sales tax.
how does that compare to BMW dealers around the country?
to your favoured third party provider?
remember these are OEM parts.
BTW M3 OEM rotors are NOT drilled according to my BMW dealer.
So I have non-OEM rotors on there now. Mmmm...are drilled rotors more
susceptible to warp?
<quote from BMW North Scottsdale in Az - wear sensor, pads and rotors
<for all four wheels on a 98 M3.....$1067 + sales tax.
<how does that compare to BMW dealers around the country?
Not bad, assuming that includes labor. I paid about that 3 years ago for
OEM brakes on my E46 328i at a dealer near Washington, DC.
"Not bad" in that it's what most dealers would charge but I recently
did all rotors, pads and parking brake shoes on a 7 for less than
US$400 worth of parts. There's nothing peculiar about BMW brakes so
any garage could do it. Having said that I'm sure the M3 brakes are
more expensive but I seem to recall the US don't have the floating
rotors so they're not as expensive as they could be.
So I looked at the brakes this weekend.
All the rotors and pads are well above the minimum thickness, and only
the front rotors showed even a hint of warpage; 0.16mm was the maximum
axial deflection I measured with the rotors mounted, max allowed is
0.20 mm. Does 0.16mm sound like enough to cause steering wheel shake?
Another thought; the shake seems to get worse at the end of my commute
when compared to leaving my house. I took the above measurements when
the brakes were cold. Can the warpage get worse during driving, then
relax when the brakes are cold?
Another question regarding rotors. Between the two friction surfaces of
the rotor, there are vanes or blades which I assume assist in cooling
the rotor. Pardon the analogy but they remind me of paddles on a
waterwheel, except they are facing the wrong way (compared to a water
wheel). On the rotor, the edge of the vane closest to the outer edge of
the rotor is actually the trailing edge (with respect to the direction
of rotation). I would have guessed that this edge of each vane should
actually be the leading edge to maximize air intake. Sorry for the
convoluted description, but those of you who can visualize what I'm
describing ( I hope there's at least one) will appreciate how hard it
is. Which way should these vanes be facing? All four of my rotors are
as described above.
Beyer Motor Works of Chandler Arizona diagnosed broken rear bushings,
worn out tires, and both rear trailing arms were bent.
I knew the tires were done for but didn't realise that could cause
So $865 for tires, and $750 for the suspension work later, the car
handles the way it should; no vibration or shudder.
And I can recommend Beyer as an alternative to BMW dealers in the
No; you get the opportunity for a real bonding experience. Get the
parts, tools, and *share an afternoon* with her changing the pads and
Personally, I don't think anything you do can guarantee these brakes
won't squeal. There are a half dozen 'cures', but none is certain.
It's an inherent characteristic of high performance disk brakes. You
want quiet; get a Buick.
(Been there; done that)
if you have dust covers on the brakes, that may lead t owarpage, if not
driving and braking as usual heats em enuff that if you hit a puddle,
the sudden cooling effect will warp em. check to make sure theyre the
front rotors or back ones. front rotors warping bad may give a lil
shimmy in the steering or a slight nudge when braking accompanied by
pedal pulsing. if not they may be the rear ones. have the sho check
using a dial gauge if they have one, i have yet to see a shop that owns
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