DIsc Brakes
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Cargo Master
Joined: Apr 2003
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From: Frequently frozen MN
DIsc Brakes
I really dust don't like working on disc brakes. I agree that they work great, but working on them has always been a PITA for me. Drums were pretty much all the same -- there was a lot of cursing and grunting with the springs and other stuff, but once you figured it out it went pretty quickly.
Discs all mount differently and they're just fussy. Latest deal I've come across involves putting rear pads on a Kia. Because of the parking brake you need a special tool to push in the caliper. This is apparently somewhat common. The caliper piston has grooves in it and the tool rotates it while pushing it back. I've seen a couple of vids and it looks doable but annoying.
Ranting,
hj
Discs all mount differently and they're just fussy. Latest deal I've come across involves putting rear pads on a Kia. Because of the parking brake you need a special tool to push in the caliper. This is apparently somewhat common. The caliper piston has grooves in it and the tool rotates it while pushing it back. I've seen a couple of vids and it looks doable but annoying.
Ranting,
hj
Cargo Master
Joined: Jan 2019
Posts: 3,369
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From: Caraway, AR
Well you know what they say, you can rent the tool and use it once, or you can buy it and never use it again! I've never had the pleasure of working on one with that setup. All mine have been boring and easy so far. Wonder why that piston has to rotate?
Logistics Pro
Joined: Sep 2007
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From: Western Mass
It has to do with the parking brake setup. There is a lever that actuates the pistons for the parking brake. As the pads wear, the lever would have to push farther and the parking brake would slowly lose effectiveness. So there is a mechanism that over time turns the piston and pushes it further out. So when you go to replace the pads, you have to turn the piston back in to reset the system. The same idea as the brake adjuster screw on drum brakes, just a different implementation.
My wife's Jetta has this system and the mechanism to rotate the piston got all gunked up so currently only one side turns the piston on, and on occasion the parking brake cable will pop loose from the lever in the cab. Need to pull it out and fix it, but she never plans for car maintenance even though I volunteer to do all the work if she passes wrenches...
My wife's Jetta has this system and the mechanism to rotate the piston got all gunked up so currently only one side turns the piston on, and on occasion the parking brake cable will pop loose from the lever in the cab. Need to pull it out and fix it, but she never plans for car maintenance even though I volunteer to do all the work if she passes wrenches...
Cargo Master
Joined: Jan 2019
Posts: 3,369
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From: Caraway, AR
So it does have a purpose other than annoying ford2go, well that's something anyhow. I have recently been looking at disc conversions and also talked myself out of it. Mostly because they are insanely expensive and the ebrake calipers are pretty flimsy looking. I tried to find newer ones on a different vehicle to adapt, but come up empty handed. But what you just described sounds like what I was looking for. Think I could get those stats on that Jetta, enough to look it up at a parts house and see what they've got?
Cargo Master
Joined: Jan 2019
Posts: 3,369
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From: Caraway, AR
Only when I want to drive around with on the next day. But I live in the flatlands, not a hill in sight. But if I ever voyage into town I may need to park on a hillside and I'd like all the normal precautions and then some. One of those things that'll never get used. Another point against the calipers in the kits as you have to use the parking break regularly to keep the brakes adjusted. They made it sound like they back off pretty quick if you don't use it all the time.
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Cargo Master
Joined: Apr 2003
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From: Frequently frozen MN
So it does have a purpose other than annoying ford2go
.Thing is I'm fairly old and my wife has health issues. Have to plan things out and it's hard if a project expands on me.
hj
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Cargo Master
Joined: Jan 2019
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From: Caraway, AR
I wasn't poking fun, just being funny. I had heard of some being like that but never knew why. What make and model are you working on that has them? I want to look it up on one of the parts house websites to get a look at the caliper.
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Cargo Master
Joined: Apr 2003
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From: Frequently frozen MN
It was pretty funny
09 Kia Spectra. Supposedly getting more common with cars that have rear disc brakes and a certain kind of parking brake. Autozone will loan you the tool -- it has various heads that fit into the grooves in the top of the caliper piston
Another point about discs. Some say to just watch the master cylinder when you push in the caliper and others say to crack the bleeder screw to keep crap out of your system. That's probably the right way, but I'd think that would mean that you'd definitely have to bleed the system.
hj
09 Kia Spectra. Supposedly getting more common with cars that have rear disc brakes and a certain kind of parking brake. Autozone will loan you the tool -- it has various heads that fit into the grooves in the top of the caliper piston
Another point about discs. Some say to just watch the master cylinder when you push in the caliper and others say to crack the bleeder screw to keep crap out of your system. That's probably the right way, but I'd think that would mean that you'd definitely have to bleed the system.
hj
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