5 Signs Your Brake Caliper Is Faulty
Brake calipers play a big role in today's disc braking systems. The
brake pads and discs, along with the rest of the hydraulic system, are
used to slow and stop the vehicle. When the brake pedal is pushed, brake fluid
is supplied via the master cylinder to the caliper, which expands the piston
and presses the brake pads against the brake discs to slow and stop the
vehicle.
Brake callipers are subjected to the strong heat released during braking
over time and might eventually break, interfering with braking and
significantly impacting the vehicle's handling and safety features.
For this safety reason, a faulty brake caliper will fail a MOT test, so
it is recommended to have the brake caliper repaired or replaced before booking
your next MOT testing service.
When a calliper fails, the vehicle will normally show one or more of the
following five warning signals to alert the driver to a potential problem that
requires attention:
1. Leaking Brake Fluid - Brake fluid leaking is one of
the most prevalent indicators of a damaged or failing caliper. The calipers
work by extending the piston and slowing the car using braking fluid pressure
from the master cylinder and pedal. The fluid is kept from seeping out by a rubber
seal and boot. These seals will wear out and leak over time as a result of
repeated exposure to the strong heat created by braking.Any brake calliper
leaks will weaken the braking system's pressure sealing capability, causing not
only a puddle of brake fluid but also a considerable reduction in the vehicle's
stopping capabilities. Your car's MOT history checker will clearly
mention that the failure was due to fluid leaks. You may witness a puddle under
your vehicle and a burned rubber smell as a result of the leaking fluid.
2. Decreased Braking Power - Though lower braking power can also
be an indication of leaking brake fluid, it can also be a sign of a faulty
brake caliper. It may appear like braking and coming to a complete stop
requires more effort. The calliper pistons themselves may have been stuck due
to dirt and grime accumulation in this situation. When the brakes are applied,
they will feel spongy, and the caliper will not be able to fully clamp down.
The inability to stop correctly might jeopardise the vehicle's safety, thus the
problem should be addressed as soon as feasible. When you check MOT
history of any vehicle, this is one of the most common
reasons for failure.
3. Unusual Sounds When Braking - Another potential problem with the
brake caliper is abnormal noises from the wheels during braking. It might be a
symptom of a loose, stuck, or binding caliper if you hear high-pitched noises,
abrupt thudding, or impact sounds when applying the brakes. In this state, the
brake calliper will not be able to stop the car correctly, and it may even
cause premature brake wear. When you look up 'check
my MOT history' online, you'll find this is another typical
reason for MOT failure.
4. Vehicle Pulling - A vehicle pulling to the left
or right is another typical indicator of a calliper that needs to be replaced.
Calipers are subjected to tremendous heat while braking, which can cause the
calliper piston to seize. A seized calliper piston will be unable to retract
mechanically, causing a continual drag on the wheel. As a result of the brake
drag, the car will pull to the side with the afflicted caliper, as the wheel on
that side is driving slower than the wheel on the opposing side.
5. Brakes Stay Engaged While
Driving - If
your brakes feel like they're on even when your foot is off the brake pedal, it
might be an indication of a jammed brake calipers. The old, filthy calipers
might be locked in a position that prevents the brake pads from properly releasing.
It may appear that the vehicle is working harder to accelerate, that it is
dragging at high speeds, or that the parking brake has been left on. If not
replaced, a jammed brake calipers will need to be repaired or replaced.
Brake callipers are a vital mechanical device of the braking system, as well as a significant factor in a vehicle's overall safety and control. As a result, if you suspect a problem with one of your calipers, get your vehicle inspected by a professional technician who will analyse your braking system and determine if you need to repair or replace your brake calipers
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