Topic: Rotor run out
in Forum: C3 Engines, Driveline and Handling
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Baldwinsville, NY - USA
Joined: 1/15/2007
Posts: 19
Vette(s): 78 Silver L48 4Spd, dual exhaust, GM vortec head, Edelbrock intake, Crane 210/216 degree x .420/.454 lift, 180 thermostat, MSD street fire
Replaced, calipers, pads, hoses, most steel tubing and master cylinder. Brakes work well, but left front rotor seemed out of round. No braking problem, but pad noise with the out of round rotor.
Well, I drilled the rivets out and replaced the front rotors and pads. 100 miles of driving and the left front rotor is just about .010 out so I shimmed it with on washer on one stud and it seemed to work, just a slight run out and very little noise.
Is this normal?
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Former Member
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Baldwinsville, NY - USA
Joined: 1/15/2007
Posts: 19
Vette(s): 78 Silver L48 4Spd, dual exhaust, GM vortec head, Edelbrock intake, Crane 210/216 degree x .420/.454 lift, 180 thermostat, MSD street fire
MK, I made a square shim for under one of the studs from roofing flange materterial, about .010. I did not think aluminum was strong enough for shimming rotors? I am going to reshim the rotor this week and test it before winter storage.
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20225
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Brass shim stock, which is highly recommended for this, can usually be found at some hobby shops. I agree about the 'lumnium...while it shouldn't be an issue if the wheels are tight, we all know that eventually, that chunk of 'lumnium is gonna disintegrate!
The rotors will move about on the hubs, especially since the rivets are now gone,
Using shims on the hub/rotor surface is fine...folks have been doing it for ages.
The rotors will move about on the hubs, especially since the rivets are now gone,
Using shims on the hub/rotor surface is fine...folks have been doing it for ages.
Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Lifetime MemberJoined: 9/8/2005
Posts: 241
Vette(s): 1980 with a Banks Twin Turbo
1969 Convert Big Block
1996 Grand Sport Convert
Former Member
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Baldwinsville, NY - USA
Joined: 1/15/2007
Posts: 19
Vette(s): 78 Silver L48 4Spd, dual exhaust, GM vortec head, Edelbrock intake, Crane 210/216 degree x .420/.454 lift, 180 thermostat, MSD street fire
Gale, That engine, wow.
Hey, the rubber looks like C4 wheels, was it worth the effort and what did you have to do get them on and under the car.
Lifetime MemberJoined: 9/8/2005
Posts: 241
Vette(s): 1980 with a Banks Twin Turbo
1969 Convert Big Block
1996 Grand Sport Convert
I originaly Installed the 88 17" Wheels on my 80' in 1989. Back then I was Told it would never work and I had to Machine my own Spacers. Now VB&P has them and they are well made. Putting the Standard 9.5" Wheel on is not that Difficult but putting the ZR-1 11" ones are a Bare. Figure on Offset Trailing arms for Sure. Richard....
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Mint Hill, NC - USA
Joined: 10/25/2007
Posts: 123
Vette(s): 1982 White Corvette, dark blue leather interior, 70,000 miles
You can get shims at NAPA
in Forum: C3 Engines, Driveline and Handling
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