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68 front rotor removal??

jims427400

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Joined
Jun 7, 2005
Messages
763
Location
Temperance Michigan
Corvette
67 427 tripower,68 427 tripower,04 Z16, 62 340hp
What is the best way to remove the rivots from the original rotors??
The rears were already removed.
Do I grind or chisel??

Jim
 

bradfordsvettes

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Joined
Mar 28, 2001
Messages
549
Location
Boston, MA area
Corvette
jewel blue 61.cranberry 69 t-top.black rose 92
drilling would be the best bet with the neatest out come IMHO ;shrug Steve
 

68Roadster

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Dec 16, 2002
Messages
1,040
Location
Dallas, TX
Corvette
'68 White Vert '05 Silverado SS
dril hole in center the size of the rivet, just enuff to get below head level and then chisel head off.....will leave rivet hole undamaged....good luck!
 

GTR1999

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Sep 4, 2003
Messages
1,146
Location
New Haven CT
Corvette
1969,1972,1975
You're going to want to check the runout in the new rotors and don't rely on using the lug nuts to hold it on. the runout will change everytime you replace the wheel. Tap the rvet holes 3/8-24 and use flat heads to bolt the rotors on. Then you can check the runout and shim to get it under .002"
 

jims427400

Well-known member
Joined
Jun 7, 2005
Messages
763
Location
Temperance Michigan
Corvette
67 427 tripower,68 427 tripower,04 Z16, 62 340hp
Good point..I've never heard of that before. Anyone else try this idea..
Drilling of the rivets worked great.

What do you mean by the runout changing every time wheels get replased??

Thanks all..
 

GTR1999

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Sep 4, 2003
Messages
1,146
Location
New Haven CT
Corvette
1969,1972,1975
If you use the lug nuts only as many do the runout will change as the bolts are torqued. I measured this a few times and depending on the particular rotor/spindle will change a few thousands or more. Since you want to dial these in to under .002 that approach just isn't a good option. Like I said I see it all the time but it comes down to how you want your car to be.

If you visit the other vette forums I use the same handle and there are more posts with pictures there.

Here is a front rotor I dialed in with bolted on rotors.

72frontrotorrigthside.jpg




rotordialin.jpg



rotorinstll.jpg
 

Art Jett

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Joined
Mar 25, 2004
Messages
366
Location
Azle Tx.
Corvette
1977 TPI 383 stroker, 700R-4/ 2002 6 spd.
What if the rotors don't have rivet holes?
 

Vettehead Mikey

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Aug 26, 2003
Messages
3,486
Location
Not that far from Ottawa
Corvette
1973 Coupe
Then install them using the lugnuts to check the runout and don't worry about it.

GTR's approach is certainly professional and can be considered 'belts and suspenders', but not mandatory.
 

Art Jett

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Joined
Mar 25, 2004
Messages
366
Location
Azle Tx.
Corvette
1977 TPI 383 stroker, 700R-4/ 2002 6 spd.
That's where I was already but I like to be thourogh. I would hate to think I took a shortcut.
 

GTR1999

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Joined
Sep 4, 2003
Messages
1,146
Location
New Haven CT
Corvette
1969,1972,1975
The aftermarket rotors with slots and holes usually don't have the rivet holes in them. I have set them up as well and was faced with either dialing them in with the lug nuts or machining a bolt hole pattern in them. The required amount of time to do the holes wasn't worth it so they were dialed in to .000-.002 but I know this runout changes with every wheel change. I measured up to .005 change using lug nuts alone but it does vary with every job. Check yours and see if it changes much as you tighen the rotor and then loosen and re-torque.

The rotors were riveted for a good reason all those years ago.

Good luck with a little time you'll get it done.
 

Art Jett

Well-known member
Joined
Mar 25, 2004
Messages
366
Location
Azle Tx.
Corvette
1977 TPI 383 stroker, 700R-4/ 2002 6 spd.
Thanks all. Gary-I know what you mean about the time and trouble to machine bolt holes in them. It would be really time consuming! I'll run the car for a while (as soon as I get the chance, I'll finish it someday) and check the runout again. If it changes drastically, I'll take the time and machine the holes. Till then I'll hope for the best. :beer Art
 

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