natman316

I just had girodisc 2 piece rotors installed by the dealership a couple weeks ago and started to get a popping noise from my left front side when braking softly, wonder if anyone had has this happen or know what could be the the problem?

Thanks!

Girard@ACGautomotive

Popping noise?

You could possible hear a rattle like keys jingling from the 2 piece rotors but with both of my cars I've never experienced even that....

Any video you could take for me?

natman316

Yeah its more of a popping... Not sure how to describe it but def not a key rattle sound. I dont have a go pro with me but I can try to film it with my cell phone tomorrow

natman316

here is all I can get with sticking my cell phone out the window. Not that clear but u can hear it while I roll up to the stop sign.

Noise is at 0:30 and 0:44

m a x i m u s

sounds like something is hitting vs popping. maybe something is stuck in the and it's causing the clicking sound?

abcut973

I would say a clicking sound. But difficult to say where it comes from.
Is it only when applying the brake pedal?

natman316

Yep it only happens when applying light to moderate braking. Anything very light or heavy( or heavier) braking and you cant hear it. I wonder what it could be, it only happens on my front left. Only changes to braking system has been the rotors and r4s pads. Installed by dealer

m a x i m u s

could be something loose, which is why it only makes the sound under light pedal. take a look and make sure the calipers are bolted down properly, and also take a look at the pads themselves.

abcut973

Could be the pads or caliper
Heavy pedal will put more pressure on the pads against the rotors so no real room for moving.
Very light pedal does not produce the sound so it is in between.
I would recheck the pads/calipers/rotors on the left front. Maybe the pads are not properly installed which is weird coming from MB.

Girard@ACGautomotive

Agreed... Sounds like something isn't tight...

As much as it's a pain I would have them re-check that everything is tightened up to spec on that corner.

natman316

Alright, thanks guys will check them and keep everyone posted

VaclavSV

Interesting -I ordered the same setup from Tal and when they come Ill install them and see if I hear that noise... but like mentioned by others probably just something loose.

The only thing I ever read was that the e-brake might damage the hat on the Girdiscs -but I dont know how much truth that post carried...

CMC-63

A little off topic, but is there a reasoning behind that key jingling rattle (Almost like a metal clicking) ? Been noticing it after I get out of my car in the garage once the engines off.

natman316

yeah seems like it. I only have the girodisc in the fronts anyways, so shouldnt be anything to do with handbrake. let me know what happen with u, im sure its not the rotors fault as its only one side, but I wanted to know if its possible that it was installed incorrectly or something...Otherwise the rotors are great!

Critter

I would jack that side of the car up and see if there is movement of the wheel from the wheel bearing, possible when the dealer removed your rotor by hitting with mallet the bearing could have been damaged. IMO Other possibility is rotor disc is loose from the hat.

Mort

Likely just the heat shields cooling off. They can make quite a racket as they contract.