Handbrake Function

[Kato]

Hey Guys,

Had my car in for it's first service and requested an adjustment of the handbrake since the car rolls a bit on an incline after releasing the brakes. The dealer has come back advising this is "normal" and that there's no adjustment for these cars as they just use the regular brakes.

Needless to say this has twigged my BS detector so interested to know if anyone else is seeing similar behaviour.

 

[POS VETT]

The parking brake on my car behaves like that. Once engaged and after releasing the service brake, the car rolls for a very small amount which, I assume, taking up the slack between gear teeth. This thread now makes me wonder if the EPB is actually not located in the rear calipers like in the Camry.

 

[OliverNuther]

Depends on whether it “rolls’ or ‘settles’. How far back is it rolling? This has been discussed before. A few of us have experienced this before and if it just sort of settles back a couple of mil we concluded it was normal. If it was rolling back an inch or so I’d be worried but no one has reported that. Personally I’ve experienced behaviour from zero roll to settling back a couple of mil but I’ve not experienced anything where I’ve gone ‘whoa, that ain’t right!’

Edit. I should also add that the EPB does seem to behave differently to manual hand brakes that I’ve had on previous cars that really lock you into place when you apply them. But I’m confident that the EPB will hold you even if it feels a bit iffy at first.

 

[Kato]

Well it's definitely not as far as when I forget the thing and leave it in park but didn't really measure since I'm used to no movement once engaged and figured a cable had stretched. Might have a bit more of a play with it to get some more info about how far it rolls and if it rolls in neutral etc.

 

[oddball]

Huh. More proof that Kia dealers aren't sending enough of their techs to the Stinger training.

The Stinger uses a "drum in hat" parking brake, like the Corvette and any other performance car. There's a mini drum brake that uses the inside of the brake rotor. There's an electric motor that actuates the brake. This type of unit normally needs recalibration once is a great while (e.g. years), but that has to be initiated by a sufficiently advanced scan tool. Of course, Autel hasn't updated jack shit since 2016 so I can't play with anything on this car yet.
It might move just a smidge to grab - drum shoes are meant to move, and the grabbing force increases as they do - but not much. One would expect it to be less movement than the trans parking awl normally needs.

The problem with caliper parking brakes is the manual actuation tends to get mucked up and causes the caliper to fail. The drum-in-hat is more expensive and complex, but more reliable long term. The unit should function for the life of the car.

Fun question - make sure you're pushing the button the right way. I *always* forget which way is set and which is release, and the indicators are crap. This is real fun on my wife's Volve XC60 - nearly rolled that sucker off the jack changing flats a couple of times.

 

[robz32]

The car does roll a bit but so far the ebrake is doing what its supposed to and garbing hard.
How do I know this? Every time I park I put the car in neutral, engage the ebrake, release brake pedal, then let the car roll until ebrake catches it and then put in park. Sounds like a lot but it takes 4 secs max to do it.

 

[oddball]

While parts availability is still awful, at least the diagrams are somewhat decent.

2018 Kia Stinger Parking Brake System - Kia Parts Now

Kia went whole-hog on this one. Electronic actuators connect directly to the drum. Most systems use normal cables from the wheels to somewhere under the body, then one electric motor that pulls on both. Not the Stinger! Two motors, baby.
The manual system is a traditional setup. One cable from the pedal to a spliter under the body.

 

[robz32]

Impressive, always thought it was one motor pulling on both cables.

I guess its more a matter of having redundancy and fail safe than anything else.

 

[Kato]

So looked into it some more and it's very short and doesn’t roll in neutral so guess they might be right

 

[ShannonC]

Just don't try to activate it whilst in motion.

 

[Kato]

Just don't try to activate it whilst in motion.

Where's the fun in that?

 

[OliverNuther]

As I recall in a previous handbrake thread, someone did try to take one for the team and pulled the EPB whilst driving and just got a stern message saying ‘don’t be a dickhead’. Or words to that effect.

 

[gilthanis1]

When I set the parking brake, I usually keep the regular brake pressed until I hear the EPB fully engage. FYI, sounds pretty cool in a garage to hear the motor whine and the brake set.

Car typically moves very little, if at all, which I attributed to the tranny cog movement as stated above.

I am very happy to learn that Kia went the high road with this system as it would be a PITA if they would've cheaped out on something so simple that could've cause tons of nagging issues.