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1969 2-piece Rotor to Hub Bolt Torque

Started by Z10Mike, January 21, 2014, 10:10:54 AM

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Z10Mike

Anyone out there have the torque specs for the bolts that hold the '69 2-piece disc brake rotor to the hub? 

69Z28-RS

09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette, '60 Corvette, '72 Corvette
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

bertfam

HERE'S the original thread (a little easier to read), but to boil it all down, 60-65 Ft/Lbs is what you want.

Ed

Z10Mike

Thanks gents for the quick response.   Seems the rotors on these 2-pc units I'm looking to pick up were removed from the hubs long ago and recently turned to about .980 inches with some unknown bolts holding them in place.  I suspected that the combination might have to be turned again after assembly with correct bolts to make them true.  Bolts probably should be at least grade 5 if not grade 8.  I'll have to check my original assembled units for head markings and then buy new bolts and have re-turned.  Further comments/recommendations welcome.

1968RSZ28


Z10Mike

Thanks 1968RSZ28 for the link- From that information, it looks like unless these mated hubs/rotors were index marked prior to disassembly, they could be out of balance when assembled again.  Starting to look like more time and trouble than these things are worth. LOL

z28z11

Quote from: Z10Mike on January 21, 2014, 10:54:00 AM
Thanks 1968RSZ28 for the link- From that information, it looks like unless these mated hubs/rotors were index marked prior to disassembly, they could be out of balance when assembled again.  Starting to look like more time and trouble than these things are worth. LOL

You know, it's really not that much different than late-model rotors - only they aren't bolted together, they float on the hubs in most cases. True, they are balanced individually, but when you install a new set of rotors, aren't you really seeing the same chance for imbalance with them changing the balance point of the original set ?

Steve
1968 Z28 M21/U17 BRG/W 1967 Chevy ll Nova SS 
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06  1949 3100 5wd 235/6