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Brakes That Wake The Dead

The crunchng, then squealing noise that ya'll are hearing 1st thing on take offs, after the vehicle has been sitting for a while with moisture in the air, is "normal" brake squeal. That is why you usually hear it 1st thing in the mornings. Dew has fallen throughout the night & the vehicle has been sitting long enough to accumulate rust. It is this accumulation of rust on the surface of your brake rotors that welds itself to your pads. There is no paint on that surface to protect them from the rust since the pads would just rub it off. Since it is just "surface" rust, you only hear it for a few minutes & then it dissapates as it wears off.

The brake pads on your vehicle, like most cars of today are semi-metallic, which are a composed of tiny metal flakes in the pad, that are not necessaly distributed evenly. These metallic pads pressing down against metal rotors will not make a beautiful sound as you could imagine, esp if there is rust in between the 2. But, that is part of the reason the pad is made of other materials. You can alleviate the problem completely by switching to a different material pad & rotor, such as ceramic. But keep in mind that higher end materials, like ceramic & carbon fiber will cost a great deal more, plus wear out quicker. Asbestos worked very well as a braking compound for cars & lasted a while too. But, we all know it was outlawed for its impact on health.

There is no warranty fix for "normal" brake squeal, but if you are hearing squealing noises coming from your brakes other than 1st thing in the mornings or after your car has been sitting for a while after a rain/wash, don't hesitate to take your car in for an inspection/test drive by the dealer. You may need your brake backing plates lubed or if you have enough miles, possibly a brake job. Keep in mind your brake wear indicators make a squealing noise as well, but they will squeal continuously until you hit the brakes at which time they should stop until movement proceeds.
 
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OK. I did some testing on this problem today as I have the same issue. First, the car is kept in a garage and was NOT driven in the rain so the rotors went in dry. When I am in reverse and lightly apply brakes, SQUEEL! Forward, no Squeel. Drove down the street a bit while gently tapping brakes (hoping to remove whatever surface rust was on the disc) and no Squeel when going forward and braking. Stopped at end of street, put into Reverse, SQUEEL again. Once the car is driven a bit and the disc warms-up, the Reverse Squeel goes away. I think temperature is a contributing factor in this problem - seems to occur when the car/disc is cold from sitting overnight. I'm going to jack the car up one morning and do a better investigation.


As an aside: I have 4 other cars. Driven the same way, some in the garage, some not. None of them have EVER had this squelling problem...I don't like starting my day with this annoyance..
 
Good luck with that, Gerry...
There's no doubt the squeal is caused by glaze/rust. Why only certain of us experience this is the great unknown.
My Passat had the noisy brakes when wet, no big deal. The objection here is how LOUD the Gen's can be. I suspect we'll just have to live with it.
From Hyundai's Tech site:
Properly performing brake pad materials may characteristically emit an "occasional" squeak or squeal. This is a condition that should be explained to an owner to reassure him or her that the brakes are functioning properly and that the noise they noticed does not indicate that a problem exists. Attempts to eliminate the noise by applying a dressing to brake pads, washing off brake pad dust or machining brake rotors are usually unsuccessful.
 
Well, I setup an appointment Friday to get this along with a few other items looked at... Nothing worse than trying to impress someone with LOUD SQUEELING brakes! Every morning it happens after pulling it from the garage... Forward, reverse, doesn't matter... Loud and annoying! I wonder if different pads would fix it? If so, Hyundai, I'm waiting for mine! ;)
 
Why only certain of us experience this is the great unknown.

This could be a key to solving the mystery. If it occurs only on vehicles sold before (or after) a certain serial number, Hyundai may have changed pad materials.
 
Black genesis badges emblems letters lettering chrome delete
sandy said:
Why only certain of us experience this is the great unknown.

This could be a key to solving the mystery. If it occurs only on vehicles sold before (or after) a certain serial number, Hyundai may have changed pad materials.
Click to expand...

To make the matter more confused: Some owners experience the problem; Some don't. Why squeal only when you brake while backing up but not when you go forward:confused:
 
Gerry, your problem may actually be with the brakes themselves. Possibly need to lube backing plates & adjust. But, I recommend dropping off the night B4 to the dealer if it only does it 1st thing in the morning because by the time you drive there, you may not be able to duplicate it.
Good Luck..
 
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Tufast said:
Gerry, your problem may actually be with the brakes themselves. Possibly need to lube backing plates & adjust. But, I recommend dropping off the night B4 to the dealer if it only does it 1st thing in the morning because by the time you drive there, you may not be able to duplicate it.
Good Luck..
Click to expand...

Good luck is right. Gerry described exactly the conditions detailed in the OP. And my GEN tech backed it out of the bay, hit the brakes, heard the squeal himself and declared it normal.
I'm thinking we're stuck, at least until Spring and warmer weather?
 
Has anyone that has the brake squeal problem backing up noticed if it goes away at all after more mileage is put on the car? Also has anyone that had the problem had it fixed in anyway? I back the car out of the garage now using the emergency brake because it doesn't squeal at all. Then after a few brake applications things are fine.
 
I have noticed that it does go away when it warms up outside... They were loud this morning though... WOW!
 
My 4.6 does the same thing backing out of my garage on cold days. When the temp is above 40 degrees F all is quiet, it doesn't matter how lightly or aggressively I apply the brakes. I live in New England and bought the car in February so the warming days brings blistfull silence.
 
clakowicz@comcast.net said:
My 4.6 does the same thing backing out of my garage on cold days. When the temp is above 40 degrees F all is quiet, it doesn't matter how lightly or aggressively I apply the brakes. I live in New England and bought the car in February so the warming days brings blistfull silence.
Click to expand...

Spot on! My brakes have also been silenced with the warmer weather the last couple of weeks in MN and it's a nice find.:cool:
 
Yes, squeals loudly only when first driving out of the garage in morning in reverse. BTW, usually very dry weather and only occasionally wet conditions here in So. AZ.

4.6 + Tech
 
Black genesis badges emblems letters lettering chrome delete
My 4.6L has very loud squeak, in reverse only, first thing in the morning when backing down the driveway. Has it something to do with the four piston front calipers on the V8?
 
Brembo brakes on sedan

Has anyone put the TRACK BREMBO's on the Genesis Sedan? Will they fit under the Sedan's 18-ers?
 
Gord-inCalgary said:
My 4.6L has very loud squeak, in reverse only, first thing in the morning when backing down the driveway. Has it something to do with the four piston front calipers on the V8?
Click to expand...

Brakes squeaking on reverse is quite common in all cars - the brakes seat a certain way because 99% of the time they are applied when the car is moving forward, and can vibrate in their seats when you back up.

Part of the issue can be resolved with properly seating the brakes - try finding an empty stretch of road, hit 60 or 70 mph, and aggressively brake to a stop. Another fix is taking the pads out and applying graphite to the backs of the pads and shims - maybe the factory amount is not enough.
 
Re: Brembo brakes on sedan

STREETS said:
Has anyone put the TRACK BREMBO's on the Genesis Sedan? Will they fit under the Sedan's 18-ers?
Click to expand...

Why would you need track brembos on the sedan?
 
Same reason they are on the Coupe TRACK- better brakes, better performance and look great.:)
 
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