Automotive

Brake noise only when stopping from higher speed

  • Last Updated:
  • Jan 12th, 2019 3:12 am
[OP]
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Apr 6, 2003
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Mississauga

Brake noise only when stopping from higher speed

Perhaps there are some mechanics around here... and can give me some feedback.

Just had the pads and rotors done on my car (Civic).

When driving around the city, the brakes sound fine. However as soon as I come off the highway, and apply medium to heavy brake force, I get almost a train sound from the front.

For some time after this happens, even braking at city speeds (60-70) will cause some more brake noise, however not to the same extent as when I originally came off the highway.

I don't get vibration at the wheel or pedal, however the noise is loud.

Any ideas/ thoughts?
24 replies
Deal Guru
Jan 15, 2006
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Richmond Hill
The pads need to be bed in. On an empty road go 80-100 and stop hard. Do this 2-3 times.
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Oakville
EP32k2 wrote:
Sep 30th, 2017 5:36 pm
The pads need to be bed in. On an empty road go 80-100 and stop hard. Do this 2-3 times.
+1, do a brake betting procedure. Industrial areas after hours are often a good place.
[OP]
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engineered wrote:
Sep 30th, 2017 7:26 pm
+1, do a brake betting procedure. Industrial areas after hours are often a good place.
Awesome... will try that.

Should I come to a complete stop or down from 80 to 10? And by hard stop, I'm assuming brake pedal to the floor.
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BuddyGuy wrote:
Sep 30th, 2017 8:22 pm
Awesome... will try that.

Should I come to a complete stop or down from 80 to 10? And by hard stop, I'm assuming brake pedal to the floor.
You want to brake hard but just before ABS kicks in. If ABS kicks in let off the brakes a bit.
You also don't want to stop. Brake to 10-20kph, then back up. When you're done, don't stop. Drive around for 10 min to cool the brakes.
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Apr 15, 2011
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aGincourt
What kind of brake pad material did you get? If it's a more coarse material it will be louder.
[OP]
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engineered wrote:
Sep 30th, 2017 8:31 pm
You want to brake hard but just before ABS kicks in. If ABS kicks in let off the brakes a bit.
You also don't want to stop. Brake to 10-20kph, then back up. When you're done, don't stop. Drive around for 10 min to cool the brakes.
Good advice, thanks!
[OP]
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Swswswish wrote:
Sep 30th, 2017 9:26 pm
What kind of brake pad material did you get? If it's a more coarse material it will be louder.
It's a Raybestos EHT Semi-Metallic pad.

And by loud, I mean GO Train loud, not just slightly louder.
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Oct 26, 2008
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BC
As the noise is really loud, I would be suspecting something else such as:
- a heat shield contacting the rotor
- no shims used on replacement pads (assuming factory pads used shims)
- replacement pads while listed as OE replacement are not a perfect fit
- caliper bracket mounting bolts not torqued down correctly

Bedding-in is certainly important with new brakes, but the fact is that very few car owners do it - and suffer no consequences.
[OP]
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macnut wrote:
Oct 1st, 2017 11:23 am
As the noise is really loud, I would be suspecting something else such as:
- a heat shield contacting the rotor
- no shims used on replacement pads (assuming factory pads used shims)
- replacement pads while listed as OE replacement are not a perfect fit
- caliper bracket mounting bolts not torqued down correctly

Bedding-in is certainly important with new brakes, but the fact is that very few car owners do it - and suffer no consequences.
- a heat shield contacting the rotor
One of the first things I checked... I even hand cranked the wheel hub with the wheel off to listen for any noises from the shield.

- no shims used on replacement pads (assuming factory pads used shims)
Shims shipped with the replacement pads and already came installed.

- replacement pads while listed as OE replacement are not a perfect fit
Possibly.

- caliper bracket mounting bolts not torqued down correctly
Bolts that hold the carrier to the knuckle are torqued to 80 ft-lbs and the bolts that hold the caliper to the slide pins are torqued to 25 ft-lbs. as per Honda spec.
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I'm curious how this turns out since I'm interested in the EHT pads too and want to install it in family members civic.

Are you using normal rotors or slotted/drilled?

On a side note, how are the pedal feel and stopping power?
[OP]
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wing0 wrote:
Oct 2nd, 2017 9:35 am
I'm curious how this turns out since I'm interested in the EHT pads too and want to install it in family members civic.

Are you using normal rotors or slotted/drilled?

On a side note, how are the pedal feel and stopping power?
I'm using normal blank rotors (Raybestos also). Here are the part numbers:
EHT465AH (pads)
980059FZN x 2 (rotors)

It's tough to gauge pedal feel and stopping power relative to stock (I bought the car used so difficult to say if the setup was OE), however stopping power feels good and pedal feel is fine (I also flushed the brake fluid and bled the system so that may impact overall pedal feel).
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BuddyGuy wrote:
Oct 2nd, 2017 10:50 am
I'm using normal blank rotors (Raybestos also). Here are the part numbers:
EHT465AH (pads)
980059FZN x 2 (rotors)

It's tough to gauge pedal feel and stopping power relative to stock (I bought the car used so difficult to say if the setup was OE), however stopping power feels good and pedal feel is fine (I also flushed the brake fluid and bled the system so that may impact overall pedal feel).
Thanks. That's the same part number I would have to get.

Do you feel vibration or any weird feeling from the pedal when you hear this noise?
It's weird to think that you have this issue only at high speed.

Let me ask a different question, did you torque your wheel lug nuts properly and evenly?
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BuddyGuy wrote:
Oct 2nd, 2017 10:50 am
I'm using normal blank rotors (Raybestos also). Here are the part numbers:
EHT465AH (pads)
980059FZN x 2 (rotors)

It's tough to gauge pedal feel and stopping power relative to stock (I bought the car used so difficult to say if the setup was OE), however stopping power feels good and pedal feel is fine (I also flushed the brake fluid and bled the system so that may impact overall pedal feel).
Any update? Fixed?
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Nov 24, 2012
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Space
Most likely just the pad material is a bit too thick. Happens a lot with aftermarket ceramic pads. Just keep driving and it will go away.

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