Dial indicator for checking rotor runout
Burning Brakes
Joined: Jan 2001
Posts: 1,206
Likes: 438
From: Loir Valley Sarthe, France
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2024 C3 of the Year Finalist - Unmodified
2023 C3 of the Year Finalist - Unmodified
Nice one! Have fun! Are the rotors still riveted, or are you just thinking ahead?
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Not sure if they're still riveted. I needed some decent drills anyway as I have Chinese ones. I basically couldn't let the deal go. I got a HSS set that's got about 50 different sized drills in it for $20, the set had some missing. For someone like me who doesn't do much drilling, it's all I need.
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Its got both metric and imperial. There are a few odd ones here and there missing but I'm sure I'll have one to do the job. Hell my drill will probably kark itself before the drill bit does.
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Ok guys finally got to check the rears for any rotor runout. I'll include a few pics for reference. LHS rear was way out, .015" at the highest point. RHS rear was only .005" at the highest point. I have been hearing the squeaking from the LHS also so clearly this needs some rectification. Feel free to add some advice on what is my next step to fix this problem. Looking at the photo's it doesn't look like there is any rivets in these rotors. I triple checked these to make sure they were correct.
LHS Rear
RHS Rear
LHS Rear
RHS Rear
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Once I remove the caliper do I need to put anything in between the pads to ensure the caliper doesn't close, thus making it simple to put back on?
Last edited by Corvetteoz; Jan 13, 2017 at 06:58 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
.005 or .006 isn't too bad I dont think but I think the specs is supposed to be under .003.
In regards to these rear rotors. I've heard they can be riveted on but these don't appear to be. The rotors appear to be just held on by the caliper. Does this appear to be correct?Yes I intend to do what you suggest, turning the rotor 180* and recheck it. With any luck it might be ok. While the rotors off I might as well check the axle too.
Once I remove the caliper do I need to put anything in between the pads to ensure the caliper doesn't close, thus making it simple to put back on?No
In regards to these rear rotors. I've heard they can be riveted on but these don't appear to be. The rotors appear to be just held on by the caliper. Does this appear to be correct?Yes I intend to do what you suggest, turning the rotor 180* and recheck it. With any luck it might be ok. While the rotors off I might as well check the axle too.
Once I remove the caliper do I need to put anything in between the pads to ensure the caliper doesn't close, thus making it simple to put back on?No
Check the date on the hose. 10 years old its done.
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Melting Slicks
Joined: Jul 2010
Posts: 3,176
Likes: 633
From: perth western australia
Someone has put a replacement rotor on which doesn't have the rivet holes so apart from the caliper, which should be taken off and wired up out the way while doing the shimming ,it relies on your your wheel nuts/road wheel to hold the rotor on .
have you disconnected the half shafts ?
Last edited by bazza77; Jan 13, 2017 at 08:09 AM.
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
Go and pull it apart. Once you look at it, you'll see it's pretty simple.
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Is that common that the rotor is not bolted on at all?
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
I might be able to just give the right hand side rotor a bit of a clean at the back and that might give me the couple of thou I need.
Melting Slicks
Joined: Jul 2010
Posts: 3,176
Likes: 633
From: perth western australia
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Race Director
Joined: Jul 2004
Posts: 12,696
Likes: 329
From: Scottsdale Arizona
Burning Brakes
Joined: Jan 2001
Posts: 1,206
Likes: 438
From: Loir Valley Sarthe, France
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2024 C3 of the Year Finalist - Unmodified
2023 C3 of the Year Finalist - Unmodified
Definitely put a block of wood or similar in between the pads as you lift the calliper away. You don't want them to close, its a pain to get them back, plus you'll get air in the system etc etc. (I keep a correct sized block in the tool chest just for the job) Much easier just to block them and then drop them back on. As said, hang them by wire, you can hook them on the chassis.
Your rotors are replacements, so no rivets. The wheel holds them on when all is bolted back together. (They were only riveted for production ease and machined true with the spindle during production.) I'm guessing the fact that they are replacements is the reason they need some shimming.
The fronts are different again, the rotors are riveted to the bearing carrier and don't need to come off that unless being replaced. There should be no run-out if it's all original unless the spindle is bent! If they have been changed, that's a different matter!
There are plenty of people who'll say it's a "snap" to change parking-brake shoes with the spindle in place - it isn't!
I'd say, don.t get into that unless you really need to!
Last edited by Stephen Irons; Jan 13, 2017 at 01:21 PM.