BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > Squeaking brakes
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      04-25-2014, 02:11 PM   #1
Nuts
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Squeaking brakes

Hi all,

I've done 215miles running in my 120d and the brakes are squeaking when coming to a halt.

Is this normal whilst running the car in?

Cheers,

Dave
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      04-25-2014, 02:17 PM   #2
DomMuc
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you have to bed your Brakepads...
Her the Maual from a Brembo Catalouge

bedding procedure
It is very important to follow
proper brake bedding
procedure following
installation. This is necessary
not only for optimum
performance of the system, but
also to avoid onset of judder
(vibration felt through brake
and steering).
The discs are delivered with a
thin zinc coating to prevent
corrosion. Prior to beginning
the bedding procedure, this
plating must be removed
from the braking surfaces by
driving the car slowly (under
30mph) and performing very
light brake applications in
order to remove the plating
without generating heat.
With too much heat or pedal
pressure, this plating can be
deposited unevenly on the
disc, and impregnated into
the pad, further increasing
the likelihood of judder
development. Once a visual
inspection of the braking
surfaces confirms that the
plating has been evenly
removed, begin with the
bedding procedure as specified
below.
• Drive vehicle to a remote
area and perform at least
30 brake applications of 3
second duration. Use light/
medium deceleration with
varying starting speeds. Leave
at least ½ mile between each
brake application
• The purpose of this procedure
is to gradually increase
the temperature in the
components without thermal
shock, and to mate the brake
pad and disc friction surfaces
• After the repeated stops,
drive the vehicle for several
miles with little or no braking
in order to adequately cool
the components
• The system is now ready for
normal use
NOTE: This entire procedure
must be complete before
driving the vehicle as normal. It
is especially important that this
process is completed before
any extended same-speed
driving is done (i.e. freeway
travel). Failure to follow these
instructions greatly increases
the likelihood of judder
development.
NOTE: After installation or
bleeding of the brake system,
flush any brake fluid from
around the bleed screws, etc,
using soapy water. Over time,
brake fluid trapped in these
areas may cause paint damage.
Additionally, do not use acidic
wheel cleaners when washing
your vehicle, as they can cause
damage to the caliper finish
and aluminum disc mounting
bells, as well as to the wheels
themselves. Use only soap and
water when cleaning wheels or
braking components.
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