Water/gurgling sound when braking? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

FR-Sky · 03-09-2017, 01:13 AM

Hi, recently I changed my brake pad (Project Mu CR) and braking bleed for about 3 weeks ago.
There is a water/gurgling mix with brake friction grinding sound when braking at low speed(around 0-15mph) ,and seems like the brake not as bit as it used to.
I haven't done any bedding, I just drive normally, and possibly couple hard brake during the past 3 weeks.

What is the problem here? Improper bedding? I checked my brake fluid and the level is okay.

Thanks

FirstWinter · 03-09-2017, 03:04 AM

You have a video of the noise or a better description? Where's the sound coming from?

FR-Sky · 03-09-2017, 03:17 AM

Quote:

Originally Posted by FirstWinter

You have a video of the noise or a better description? Where's the sound coming from?

Its coming from driver side when braking at low speed, I can hear the friction on the rotor and some kinda water running sound.

Jajanken86 · 03-09-2017, 03:28 AM

Gurgling kinda describes the sound my brakes make when I set off in the morning and the rust gets scratched off the rotors

Sent from my iDroid

FR-Sky · 03-09-2017, 03:37 AM

Quote:

Originally Posted by Jajanken86

Gurgling kinda describes the sound my brakes make when I set off in the morning and the rust gets scratched off the rotors

Sent from my iDroid

Lol, I wish it is just morning dust,, but it happens everytime i brake at low speed.

Mr.ac · 03-09-2017, 04:21 AM

Bleed it again.

It could be possible you didn't close the bleeder valve all the way close, and might have some air trapped in the lines.

renfield90 · 03-09-2017, 11:16 AM

We're gonna need video. But my bet is your brakes just sound funny.

Check your coolant level. If there is actual water gurgling it's probably from there.

Tcoat · 03-09-2017, 11:26 AM

Quote:

Originally Posted by FR-Sky

There is a water/gurgling mix with brake friction grinding sound when braking at low speed(around 0-15mph) ,and seems like the brake not as bit as it used to.

Check to make sure both pads on the wheel are properly in place and not loose.

finch1750 · 03-09-2017, 12:37 PM

Race pads make terrible sounds at low speed when cold. And cold for them can easily happen driving normally since they have higher operating ranges then other pads.

But a vid would help us guess more accurately

FR-Sky · 03-09-2017, 01:25 PM

Thanks guys, taking back to the shop today and will update.

FR-Sky · 03-10-2017, 03:06 AM

ok guys.....here is the update....
According to the mechanic, everything was fine...the bleed, rotor, except...
so the issue was...the surface of the brake pad's compound is degrading due to the item is storing too long...that's why the compound on top of the brake pad surface is very hard to bed in which causing the gurgling sound. Also, the mechanic said he had used 5 set of this brake pad and never have this problem. (We didn't buy at the same vendor).

dem00n · 03-10-2017, 08:53 AM

The part of the brake pad compound degrading due to storage sounds like BS, but everything else sounds right.

I have the Winmax W4 and if you list closely with slow braking, you'll get that gurgling sound.

Tcoat · 03-10-2017, 09:26 AM

Quote:

Originally Posted by dem00n

The part of the brake pad compound degrading due to storage sounds like BS, but everything else sounds right.

I have the Winmax W4 and if you list closely with slow braking, you'll get that gurgling sound.

Yes it is BS. If you are buying brake pads that degrade from sitting on a shelf then you need to get them off your car right this second.

renfield90 · 03-10-2017, 11:30 AM

Quote:

Originally Posted by FR-Sky

ok guys.....here is the update....
According to the mechanic, everything was fine...the bleed, rotor, except...
so the issue was...the surface of the brake pad's compound is degrading due to the item is storing too long...that's why the compound on top of the brake pad surface is very hard to bed in which causing the gurgling sound. Also, the mechanic said he had used 5 set of this brake pad and never have this problem. (We didn't buy at the same vendor).

Lol. NEVER go to this mechanic again - you can't put a price on trust, especially when it comes to your car. Brake pad compounds don't degrade from storing too long. The Project Mu CR is a mix of graphite and various metals, tell me how that's going to degrade or make it hard to bed in if it sits in a box?

He BS'd you because he's not going to make any more money from you on this job, and wants you to go away. How are you going to feel if he actually screws something up, you come back to him to get it fixed and he does the same trick to get you out the door?

Aggressive pads are known for not only sounding funny, but changing their sound through their life depending on the state of the transfer film on the rotors (among other things). I bet if you give them a good hard bedding in they will sound different.

My friend always tells me my pads sound like a spaceship. At this point I've tuned the noise out (or I'm losing my hearing) because I don't notice, it's part of the compromise of running a more aggressive pad.

03-09-2017, 01:13 AM	#1
FR-Sky Senior Member Join Date: Dec 2015 Drives: 2013 FR-S 10 series [755] Location: Bay Area, CA Posts: 1,189 Thanks: 385 Thanked 390 Times in 264 Posts Mentioned: 7 Post(s) Tagged: 2 Thread(s)	Water/gurgling sound when braking? Hi, recently I changed my brake pad (Project Mu CR) and braking bleed for about 3 weeks ago. There is a water/gurgling mix with brake friction grinding sound when braking at low speed(around 0-15mph) ,and seems like the brake not as bit as it used to. I haven't done any bedding, I just drive normally, and possibly couple hard brake during the past 3 weeks. What is the problem here? Improper bedding? I checked my brake fluid and the level is okay. Thanks Last edited by FR-Sky; 03-09-2017 at 01:48 AM.

03-09-2017, 04:21 AM	#6
Mr.ac [insert cool phrase here] Join Date: Aug 2015 Drives: BRZ Premium Location: Central Coast CA Posts: 2,368 Thanks: 709 Thanked 1,559 Times in 930 Posts Mentioned: 30 Post(s) Tagged: 0 Thread(s)	Bleed it again. It could be possible you didn't close the bleeder valve all the way close, and might have some air trapped in the lines. __________________ New daily driver - Subaru BRZ Premium Weekend fun/track car - '91 MR2 Turbo Gen3 Old daily driver - '88 MR2 Supercharged

03-09-2017, 12:37 PM	#9
finch1750 Undisputed El Presidente Join Date: Jun 2012 Drives: Zenki 37J ZN6 Location: Stockton, CA Posts: 11,593 Thanks: 9,403 Thanked 9,411 Times in 5,270 Posts Mentioned: 374 Post(s) Tagged: 33 Thread(s)	Race pads make terrible sounds at low speed when cold. And cold for them can easily happen driving normally since they have higher operating ranges then other pads. But a vid would help us guess more accurately __________________ "Just like how a strut bar somehow enables you to corner 20MPH faster around a cloverleaf on-ramp, when the reality is, you can do it already but you just don't have to balls to do it." - CSG David

03-10-2017, 08:53 AM	#12
dem00n Member of the year - 2016 Join Date: Jul 2012 Drives: Scion FRS Location: New York Posts: 3,575 Thanks: 788 Thanked 2,427 Times in 1,111 Posts Mentioned: 23 Post(s) Tagged: 0 Thread(s)	The part of the brake pad compound degrading due to storage sounds like BS, but everything else sounds right. I have the Winmax W4 and if you list closely with slow braking, you'll get that gurgling sound. __________________ Friends don't let friends Plastidip

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
I hear a rattling sound when braking in neutral with A/C on. Is this normal ?	awhatzable	Scion FR-S / Toyota 86 GT86 General Forum	4	05-21-2015 09:25 PM
Braking Noise	hasfoot	Issues \| Warranty \| Recalls / TSB	12	04-25-2015 12:02 AM
Terrible sound under braking... help?	PoWn3d_0704	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	12	03-07-2014 10:53 PM
More sounds; metal whirring sound braking to stop in neutral	l0aded	Issues \| Warranty \| Recalls / TSB	2	07-13-2013 02:05 AM
Engine Braking	Wattage	Scion FR-S / Toyota 86 GT86 General Forum	75	01-16-2013 02:51 PM

03-09-2017, 03:04 AM	#2
FirstWinter Senior Member Join Date: Nov 2015 Drives: Car Location: Location Posts: 646 Thanks: 374 Thanked 422 Times in 254 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	You have a video of the noise or a better description? Where's the sound coming from?

03-09-2017, 03:28 AM	#4
Jajanken86 Senior Member Join Date: Apr 2016 Drives: Silver FR-S Location: Saipan ✈ Portland Posts: 231 Thanks: 92 Thanked 36 Times in 28 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Gurgling kinda describes the sound my brakes make when I set off in the morning and the rust gets scratched off the rotors Sent from my iDroid

03-09-2017, 11:16 AM	#7
renfield90 The Stig's German cousin Join Date: Mar 2013 Drives: 2013 FR-S Location: Tempe, AZ Posts: 1,071 Thanks: 140 Thanked 519 Times in 345 Posts Mentioned: 8 Post(s) Tagged: 2 Thread(s)	We're gonna need video. But my bet is your brakes just sound funny. Check your coolant level. If there is actual water gurgling it's probably from there.

03-09-2017, 01:25 PM	#10
FR-Sky Senior Member Join Date: Dec 2015 Drives: 2013 FR-S 10 series [755] Location: Bay Area, CA Posts: 1,189 Thanks: 385 Thanked 390 Times in 264 Posts Mentioned: 7 Post(s) Tagged: 2 Thread(s)	Thanks guys, taking back to the shop today and will update.

03-10-2017, 03:06 AM	#11
FR-Sky Senior Member Join Date: Dec 2015 Drives: 2013 FR-S 10 series [755] Location: Bay Area, CA Posts: 1,189 Thanks: 385 Thanked 390 Times in 264 Posts Mentioned: 7 Post(s) Tagged: 2 Thread(s)	ok guys.....here is the update.... According to the mechanic, everything was fine...the bleed, rotor, except... so the issue was...the surface of the brake pad's compound is degrading due to the item is storing too long...that's why the compound on top of the brake pad surface is very hard to bed in which causing the gurgling sound. Also, the mechanic said he had used 5 set of this brake pad and never have this problem. (We didn't buy at the same vendor).

User Name		Remember Me?
Password