Rear brakes

[Mike_H]

Pretty sure I fried my brakes on the way home from work tonight. I think my parking brake hung up on the drivers side. Got hot enough that it was smoking pretty badly and I thought it prudent to spray water to cool it down.

Anyway, am I doing brakes, rotors, calipers, pads and rebuilding the parking brake, or can I just replace the stuff that is obviously wrong?

04 Rubicon, so discs in the rear.

@mrblaine does black magic have a rear brake "kit?"

 

[Adam Johnson]

Spraying the cold water probably warped the rotor. So I would replace that for sure. Pads are probably fine since they weren't the friction surface engaged. Shoes on the parking brake are probably trashed, I'd do hardware set on that as well.

Most importantly, I'd look into what caused the parking brake to hang up to make sure it doesn't happen again.

 

[Mike_H]

Looks like I'll need both pads and shoes. They both look burned. Gonna replace the rotor too... It's a bit discolored on the parking brake surface. I don't know how old it is either... It's been on longer than I've had the Jeep. I'll be calling @mrblaine tomorrow to order some parts.

Why did it hang up? Mud...its the devil! I got stuck a couple weeks ago and buried the driver's side. Thought I got it cleaned out, but apparently not.

 

[Squatch]

I'd hang onto the old rotors and have 'em checked to see if they still can be turned down. If so, either have 'em turned and keep 'em around as spares, or just save 'em and have 'em turned later...or sell them to someone in need. Just a thought.

*Bet now you understand why my garage is so packed full of stuff that you can barely move!

 

[Adam Johnson]

yeah that's a lot of dust from those shoes wearing down.

If it got as hot as you say, I'd also replace the axle seal as a precaution.

 

[mrblaine]

Pretty sure I fried my brakes on the way home from work tonight. I think my parking brake hung up on the drivers side. Got hot enough that it was smoking pretty badly and I thought it prudent to spray water to cool it down.

Anyway, am I doing brakes, rotors, calipers, pads and rebuilding the parking brake, or can I just replace the stuff that is obviously wrong?

04 Rubicon, so discs in the rear.

@mrblaine does black magic have a rear brake "kit?"

We have a kit with pads, rotors, and or calipers. You don't need the Black Magic Pads. The parking brake shoes and hardware are a separate item.

Yes, just replace what is needed. If there is nothing wrong with the calipers, keep them.

 

[mrblaine]

Spraying the cold water probably warped the rotor. So I would replace that for sure. Pads are probably fine since they weren't the friction surface engaged. Shoes on the parking brake are probably trashed, I'd do hardware set on that as well.

Most importantly, I'd look into what caused the parking brake to hang up to make sure it doesn't happen again.

If cold water on hot rotors warped them, after every rain storm every automotive repair shop would have lines of cars out into the street to get the rotors swapped. The reason we use iron to make rotors from is its resistance to thermal shock and it's job is to get hot and cooled down over and over at various rates including the splash of water from puddles after a rainstorm.

 

[Mike_H]

I'd hang onto the old rotors and have 'em checked to see if they still can be turned down. If so, either have 'em turned and keep 'em around as spares, or just save 'em and have 'em turned later...or sell them to someone in need. Just a thought.

*Bet now you understand why my garage is so packed full of stuff that you can barely move!

I honestly don't know if there is anyone around who turns rotors anymore. Its a lost trade.

 

[mrblaine]

I honestly don't know if there is anyone around who turns rotors anymore. Its a lost trade.

I don't have any close to me and when they did do it, it was almost as much as a new rotor.

 

[Mike_H]

yeah that's a lot of dust from those shoes wearing down.

If it got as hot as you say, I'd also replace the axle seal as a precaution.

That wasn't pad dust... It's was clay and sand left over from me burying the Jeep a couple weeks ago. I'm assuming that it jammed up the mechanism and didn't allow the parking shoes to release like they are supposed to.

The axle seal is fine.

 

[Squatch]

I honestly don't know if there is anyone around who turns rotors anymore. Its a lost trade.

Wow. Still have plenty of places around me that do it. Last time I checked, it was $15.00 per rotor.

 

[Adam Johnson]

If cold water on hot rotors warped them, after every rain storm every automotive repair shop would have lines of cars out into the street to get the rotors swapped. The reason we use iron to make rotors from is its resistance to thermal shock and it's job is to get hot and cooled down over and over at various rates including the splash of water from puddles after a rainstorm.

Normally I'd agree but if they're red hot as implied, I disagree.

 

[Adam Johnson]

I honestly don't know if there is anyone around who turns rotors anymore. Its a lost trade.

Any machine shop should be capable of doing it. I know that when I stopped doing brakes all the time, manufacturers were starting to install some rotors that were at the machine to spec when they were new. They were effectively disposable since they couldn't be resurfaced.

 

[Squatch]

Any machine shop should be capable of doing it. I know that when I stopped doing brakes all the time, manufacturers were starting to install some rotors that were at the machine to spec when they were new. They were effectively disposable since they couldn't be resurfaced.

Welcome to our "throw away society"...

 

[mrblaine]

Wow. Still have plenty of places around me that do it. Last time I checked, it was $15.00 per rotor.

You'd really spend 15 bucks to turn a 20 dollar rotor?

 

[Squatch]

View attachment 90399

You'd really spend 15 bucks to turn a 20 dollar rotor?

I would, and I still do, until the originals are no longer usable. I also rebuild my wheel cylinders. I've been known to rebuild my master cylinders and calipers, as well, though I will admit that doing the calipers has always been a pain in the ass, and I rarely do so anymore.

Not all will agree, but my reasoning is that the OE parts had already proven themselves, and stood the test of time (and miles). To my way of thinking, their quality has already been established, and it's a good base on which to rebuild. Once upon a time, the cost of rebuilding vs replacing was also a factor, but not so much anymore. The cost of imported parts has forever changed that as a consideration.

 

[mrblaine]

I would, and I still do, until the originals are no longer usable. I also rebuild my wheel cylinders. I've been known to rebuild my master cylinders and calipers, as well, though I will admit that doing the calipers has always been a pain in the ass, and I rarely do so anymore.

Not all will agree, but my reasoning is that the OE parts had already proven themselves, and stood the test of time (and miles). To my way of thinking, their quality has already been established, and it's a good base on which to rebuild. Once upon a time, the cost of rebuilding vs replacing was also a factor, but not so much anymore. The cost of imported parts has forever changed that as a consideration.

You're not answering the question I asked. I fully understand turning a high dollar OE rotor and if I had anyone close that could, I would have them do it. I would not turn a 20 dollar rotor and anyone that does is silly.

 

[Squatch]

You're not answering the question I asked. I fully understand turning a high dollar OE rotor and if I had anyone close that could, I would have them do it. I would not turn a 20 dollar rotor and anyone that does is silly.

Okay. Generally speaking, no, I would not turn a $20 aftermarket rotor or drum.

 

[Steven_Olson]

Pep boys around here will turn rotors. I was surprised they still did it but there was only one guy that worked there that knew how to run the machine.

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