Brake squeal after new pads installed

[Zero682]

Hi Everyone,

I'm new to the forums here, but I have a 2011 Hyundai Genesis with the V6. Been a great car, bought it a year ago with 17k on it.
Its around 37k now and I decided to change out the pads in the front. Old ones weren't bad, but I like a good pedal. Used Bosch QuietCasts, that I have always had good luck with. My old man was a mechanic for 30+ years so I know how to change out brakes. Rotors were still good to go. Was a super easy job, made sure the slides and pads were greased right.

Now when I first lightly apply the brakes, I will randomly hear a squeal, breaking any harder makes it goes away.
Its around 75% of the time and its getting annoying.

The only thing I can think of that was weird is that there was a metal shim piece that sat on the old pads, which is for the piston to press on to apply pressure to the pads. I changed that over to the new pads. Odd design since the piston slightly overhangs on top of the pad.

Anybody else had any experience with this? I am hoping it goes away after a few miles, but I am wondering if the anti-squeal shim touching the piston shim is making the noise. It clipped on top of the new pads with no effort and was tight.

Thanks to anyone with insight on this.

 

[Gunkk]

[video=youtube;A5cneCgNA9U]https://www.youtube.com/watch?v=A5cneCgNA9U[/video]

 

[homeofstone]

Many times when changing brake pads the rotors should be turned to minimize the possibility of brake squeal. Also the pads that come on the Genesis are very high quality. I got 130,000 miles on my front pads. Many on this forum have never had to change their brake pads unless driving about 90% in town.

 

[dougmcp]

In the interest of unsprung weight, manufacturers are using rotors that have so little meat on them they can't be turned, consequently I have found that today's cars usually eat up the rotors by the time the pads are worn out.
As these pads are complete with their own anti-squeal shims I'm not sure you should have put the old shims back in.
The Bosch pads are a ceramic and because you installed them on existing rotors they may need a few miles of break-in to seat themselves.

It's pretty rare that your brakes only lasted 37K miles, most owners are reporting much higher mileage. I just had an inspection done on mine and at 42K miles I still have 6mm of pad left.

 

[Zero682]

They had life on them, decided to put fresh ones on. I'm calling it the piston shim, but it almost has to be used since its where the piston directly connects to the pads and it wouldn't connect right if it wasn't there . The picture is off the hyundai oem website, shows being put on top of the anti squeal pad.

 

[jglenn21]

did you happen to apply anti squeal on the backside of the pads.. I do this to all my pads and it works

Permatex makes a good spray on product

 

[Bill K]

Many people get 100,000 miles out of front pads. (hard to believe). There was a YouTube video where the guy had over 100,000 miles when he changed them. He said that they were only half worn, and that the rotors were still within thickness tolerances, but he had already bought new rotors.

 

[homeofstone]

Many people get 100,000 miles out of front pads. (hard to believe). There was a YouTube video where the guy had over 100,000 miles when he changed them. He said that they were only half worn, and that the rotors were still within thickness tolerances, but he had already bought new rotors.

I got 130,000 miles on front pads and still have original rotors and do not need pads again yet with 200,000 miles now on my Genesis.

 

[NSXNEXT]

did you happen to apply anti squeal on the backside of the pads.. I do this to all my pads and it works

Permatex makes a good spray on product

Yup, gotta put a thin layer on the shim to prevent squeal. Do it everytime I change pads.