Round spinny bits and things that stop them.
Moderator: Moderators
- zaxrex
- DCAWD Founding Member
- Posts: 6350
- Joined: Mon Sep 06, 2004 8:00 pm
- Location: asiandale
Round spinny bits and things that stop them.
What's this you say, the guy who has duplicates of everything is needing to borrow car parts?
Yes, it is true. All my rotors and calipers are a three hour drive away, and I can't get down there to pick them up.
First, a back story.
About six months ago, I was noticing some creeping/groaning noises when I applied the breaks, even while stopped. Pried the calipers a little and tried to wiggle the rotors, but the all seemed to be solid. I just though it was the lines rubbing on something as the pressure increased. Took it into a shop before I left for a trip and had them check it out. No problems.
This weekend, I decided to clean my wheels. I know, shocker, right? So when I do something, I do it all the way and I take off the wheels and clean the inside as well as the out facing bits. Nice and clean SSR Comps now.
I bring them back and start putting one back on, and I see some strange pattern in the hat. Look like up-swept feathers going from the locking pins to the outer edge of the hat. Look a little closer and some of them are a light dull grey. Go around to the other side and look there.
THERE ARE COMPLETELY CIRCUMFERENTIAL CRACKS THROUGH ALL THE MOUNTING PINS!!!!
Go back to the other side and spin the wheel a half turn, I see bigger feathers with TIPS SEPARATED FROM THE EDGE OF THE HAT!!!
So, Meth Blue is no longer in safe roadworthy condition. Turns out the locking pins are steel, the hats are aluminum, and the rotors are iron. Stop Tech super tech Frank said, oh yeah, that's normal. There is galvanic corrosion between the three metals. if the vehicle is driven infrequently and the parts are not heat cycled or are driven on roads treated with liquid brine solution, the steel pins corrode and actually expand in the locking holes of the hats. This causes increased pressure and do not allow the pins to slide to accommodate for frinction ring heat expansion. This puts stress on the hats that will eventually develop stress cracks.
So, long story short. Anybody have some stock rotors and calipers that I could borrow?
Yes, it is true. All my rotors and calipers are a three hour drive away, and I can't get down there to pick them up.
First, a back story.
About six months ago, I was noticing some creeping/groaning noises when I applied the breaks, even while stopped. Pried the calipers a little and tried to wiggle the rotors, but the all seemed to be solid. I just though it was the lines rubbing on something as the pressure increased. Took it into a shop before I left for a trip and had them check it out. No problems.
This weekend, I decided to clean my wheels. I know, shocker, right? So when I do something, I do it all the way and I take off the wheels and clean the inside as well as the out facing bits. Nice and clean SSR Comps now.
I bring them back and start putting one back on, and I see some strange pattern in the hat. Look like up-swept feathers going from the locking pins to the outer edge of the hat. Look a little closer and some of them are a light dull grey. Go around to the other side and look there.
THERE ARE COMPLETELY CIRCUMFERENTIAL CRACKS THROUGH ALL THE MOUNTING PINS!!!!
Go back to the other side and spin the wheel a half turn, I see bigger feathers with TIPS SEPARATED FROM THE EDGE OF THE HAT!!!
So, Meth Blue is no longer in safe roadworthy condition. Turns out the locking pins are steel, the hats are aluminum, and the rotors are iron. Stop Tech super tech Frank said, oh yeah, that's normal. There is galvanic corrosion between the three metals. if the vehicle is driven infrequently and the parts are not heat cycled or are driven on roads treated with liquid brine solution, the steel pins corrode and actually expand in the locking holes of the hats. This causes increased pressure and do not allow the pins to slide to accommodate for frinction ring heat expansion. This puts stress on the hats that will eventually develop stress cracks.
So, long story short. Anybody have some stock rotors and calipers that I could borrow?
Patience is the ability to idle your motor when you feel like stripping your gears
- ElZorro
- DCAWD Founding Member
- Posts: 5958
- Joined: Thu Aug 12, 2004 8:00 pm
- Location: USA! USA!
Re: Round spinny bits and things that stop them.
sorry, no. good luck! lemme know if you need a hand with the work once you get them
Jason "El Zorro" Fox
'17 Subaru Forester 2.0XT
DCAWD - old coots in fast scoots.
'17 Subaru Forester 2.0XT
DCAWD - old coots in fast scoots.
- drwrx
- DCAWD Founding Member
- Posts: 4382
- Joined: Mon Sep 20, 2004 8:00 pm
Re: Round spinny bits and things that stop them.
I believe I have a full set of stock rotors, with very low mileage.
I'll look today after work.
No calipers though.
I'll look today after work.
No calipers though.
- Sabre
- DCAWD Founding Member
- Posts: 21432
- Joined: Wed Aug 11, 2004 8:00 pm
- Location: Springfield, VA
- Contact:
Re: Round spinny bits and things that stop them.
Oh damn, that sucks! I hope you got her back on the road!
Sabre (Julian)
92.5% Stock 04 STI
Good choice putting $4,000 rims on your 1990 Honda Civic. That's like Betty White going out and getting her tits done.
92.5% Stock 04 STI
Good choice putting $4,000 rims on your 1990 Honda Civic. That's like Betty White going out and getting her tits done.
- drwrx
- DCAWD Founding Member
- Posts: 4382
- Joined: Mon Sep 20, 2004 8:00 pm
Re: Round spinny bits and things that stop them.
Sadly, I must have given the fronts out, I only have the rears.
Wait, didn't I give you the fronts during your swap debacle with the former cop?
Wait, didn't I give you the fronts during your swap debacle with the former cop?
-
- DCAWD Founding Member
- Posts: 1189
- Joined: Fri Aug 27, 2004 8:00 pm
Re: Round spinny bits and things that stop them.
I've got my entire BRZ front set-up. Caliper, Rotors, Pads, etc... I would assume that it would be a simple bolt-on affair with any GD/GG Impreza as I have the GC/GD 4 pot set-up on there now. Lemme know if you need em.
- zaxrex
- DCAWD Founding Member
- Posts: 6350
- Joined: Mon Sep 06, 2004 8:00 pm
- Location: asiandale
Re: Round spinny bits and things that stop them.
thanks guys,
as it turns out USPS delivered a 45lb box yesterday. Calipers, hats, rotors, lines, and pads.
as it turns out USPS delivered a 45lb box yesterday. Calipers, hats, rotors, lines, and pads.
Patience is the ability to idle your motor when you feel like stripping your gears
- ElZorro
- DCAWD Founding Member
- Posts: 5958
- Joined: Thu Aug 12, 2004 8:00 pm
- Location: USA! USA!
Re: Round spinny bits and things that stop them.
Now is that 45# of weight, or 45# of stopping ability, or 45# of line pressure, or... you need to be clear with these shipping companies.
Jason "El Zorro" Fox
'17 Subaru Forester 2.0XT
DCAWD - old coots in fast scoots.
'17 Subaru Forester 2.0XT
DCAWD - old coots in fast scoots.
-
- DCAWD Founding Member
- Posts: 1189
- Joined: Fri Aug 27, 2004 8:00 pm
Re: Round spinny bits and things that stop them.
I remember the last time there was a 45lb measurement invloved. It ended up being a HUGE turbo, right?
- zaxrex
- DCAWD Founding Member
- Posts: 6350
- Joined: Mon Sep 06, 2004 8:00 pm
- Location: asiandale
Re: Round spinny bits and things that stop them.
Hehe, that was 65# for the turbo. or was it 56#?
So I only have one set of wheels that will clear the Brembo conversion that Darrin put on. So I was supposed to trade a set of rear Brembo calipers for a "new" set of 4-pots from Subaru. Enter Philly ex-cop debacle. So the wagon now has 4-pots, and the sedan has cracked hats.
The brakes that I got now (wow, what a deal)! are a full Stoptech setup, I'm going to steal the hats and rotors to replace the ones I need, and keep an eye out for a deal on more hats and rotors so that both cars can have fully interchangeable parts.
Few, nothing like getting back into the mod game again... and I thought I was stopped.
So I only have one set of wheels that will clear the Brembo conversion that Darrin put on. So I was supposed to trade a set of rear Brembo calipers for a "new" set of 4-pots from Subaru. Enter Philly ex-cop debacle. So the wagon now has 4-pots, and the sedan has cracked hats.
The brakes that I got now (wow, what a deal)! are a full Stoptech setup, I'm going to steal the hats and rotors to replace the ones I need, and keep an eye out for a deal on more hats and rotors so that both cars can have fully interchangeable parts.
Few, nothing like getting back into the mod game again... and I thought I was stopped.
Patience is the ability to idle your motor when you feel like stripping your gears
- drwrx
- DCAWD Founding Member
- Posts: 4382
- Joined: Mon Sep 20, 2004 8:00 pm
Re: Round spinny bits and things that stop them.
It never ends.
Are the Stop Tech rotors the only way to go with the calipers?
Because, I gotta say, a new set of simple cast iron rotors for our vehicles are only around $50 a pop.
Just sayin'.
Are the Stop Tech rotors the only way to go with the calipers?
Because, I gotta say, a new set of simple cast iron rotors for our vehicles are only around $50 a pop.
Just sayin'.
- Raven
- Mr. Underpowered or something
- Posts: 1221
- Joined: Thu Feb 18, 2010 12:46 pm
- Location: Manasty
Re: Round spinny bits and things that stop them.
One piece rotors for the win. Yeah, the modding never ends. I'm even getting into modding with the car I was never going to mod.
All my cars have drum brakes and are sub 200 hp, what am I doing with my life?
2013 Mazda 2
1994 Chevy S10 pickup
1985 Chevy Caprice (no fuel system)
2013 Mazda 2
1994 Chevy S10 pickup
1985 Chevy Caprice (no fuel system)
- zaxrex
- DCAWD Founding Member
- Posts: 6350
- Joined: Mon Sep 06, 2004 8:00 pm
- Location: asiandale
Re: Round spinny bits and things that stop them.
UPS man bringing you bigger rubber bands?Raven wrote:One piece rotors for the win. Yeah, the modding never ends. I'm even getting into modding with the car I was never going to mod.
But Darin, you know I'm all about the bling...
So a little recap of events. Got the replacement use kit upened up and starting to work on it. Was a bear to get the hat fasteners off. Amazing what oxidation painted over with caliper paint can do. Got the hat off and confirmed that there were no stress cracks under the washers. While it was off, I decided to disassemble my CRACKED ones. I had no expectations that they would be easy to remove, so I put them on the grill at 600 degrees (C'mon, they are brake rotors and hats, like they have never seen this temp before...), let them cool down overnight as the grill went out. Next morning, doused them in liquid wrench, wrapped them up in plastic wrap, and stuck them in the freezer (OK, colder than they have probably been by about 20 degrees, but then who is counting). Unwraped them, and saw just how amazingly strong bimetalic differential thermal expansion is.
See before and after pics
Fasteners came off really easily after that. Mainly because the reciever studs had either cracked straight through, or sheared off when turning the bolt head.
Well that was fun and informative. Now, just for S's & G's I wonder how the fit would be with the new hats on the old rotors. Tried and tried, but just could not get the holes to line up. Receiver studs flush on one side are an 1/8 off on the other. Found the part number on the hat and looked it up.
This was a hat for the 332mm brake kit.
So was the rotor.
So was the caliper.
Everything more bigger.
The description on the sale was that these were take offs from a 2002 WRX with 17" wheels.
I asked how wide, "oh, stock width, there was no rubbing when I lowered the car". Ok, so 7"
Yeah, not so much...
So waiting for a reply from the guy about why the numbers don't add up.
You do not have the required permissions to view the files attached to this post.
Patience is the ability to idle your motor when you feel like stripping your gears
- Sabre
- DCAWD Founding Member
- Posts: 21432
- Joined: Wed Aug 11, 2004 8:00 pm
- Location: Springfield, VA
- Contact:
Re: Round spinny bits and things that stop them.
Damn!
Sabre (Julian)
92.5% Stock 04 STI
Good choice putting $4,000 rims on your 1990 Honda Civic. That's like Betty White going out and getting her tits done.
92.5% Stock 04 STI
Good choice putting $4,000 rims on your 1990 Honda Civic. That's like Betty White going out and getting her tits done.
- drwrx
- DCAWD Founding Member
- Posts: 4382
- Joined: Mon Sep 20, 2004 8:00 pm
Re: Round spinny bits and things that stop them.
I would half-expect those to sheer at high force / temp usage.
- zaxrex
- DCAWD Founding Member
- Posts: 6350
- Joined: Mon Sep 06, 2004 8:00 pm
- Location: asiandale
Re: Round spinny bits and things that stop them.
Was told by StopTech that the corrosion on the anchor pins was in part a result of not getting the rotors/hats hot enough while driving. Steel pins oxidized and grew in the drive pin holes.
"our brakes love being hot, drives off moisture and narrows the pathway for galvonic reduction" I love it when they talk dirty...
"our brakes love being hot, drives off moisture and narrows the pathway for galvonic reduction" I love it when they talk dirty...
Patience is the ability to idle your motor when you feel like stripping your gears
- Sabre
- DCAWD Founding Member
- Posts: 21432
- Joined: Wed Aug 11, 2004 8:00 pm
- Location: Springfield, VA
- Contact:
Re: Round spinny bits and things that stop them.
zaxrex wrote:"our brakes love being hot, drives off moisture and narrows the pathway for galvonic reduction" I love it when they talk dirty...
Sabre (Julian)
92.5% Stock 04 STI
Good choice putting $4,000 rims on your 1990 Honda Civic. That's like Betty White going out and getting her tits done.
92.5% Stock 04 STI
Good choice putting $4,000 rims on your 1990 Honda Civic. That's like Betty White going out and getting her tits done.
- Raven
- Mr. Underpowered or something
- Posts: 1221
- Joined: Thu Feb 18, 2010 12:46 pm
- Location: Manasty
Re: Round spinny bits and things that stop them.
Wow, that is utterly terrifying to look at.
All my cars have drum brakes and are sub 200 hp, what am I doing with my life?
2013 Mazda 2
1994 Chevy S10 pickup
1985 Chevy Caprice (no fuel system)
2013 Mazda 2
1994 Chevy S10 pickup
1985 Chevy Caprice (no fuel system)
-
- DCAWD Groupie
- Posts: 1659
- Joined: Fri Nov 19, 2004 7:00 pm
- Location: washington, dc
- Contact: