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Author Topic: 1969 2-piece Rotor to Hub Bolt Torque  (Read 1923 times)
Z10Mike
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« on: January 21, 2014, 10:10:54 AM »

Anyone out there have the torque specs for the bolts that hold the '69 2-piece disc brake rotor to the hub? 
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69Z28-RS
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« Reply #1 on: January 21, 2014, 10:13:27 AM »

google is your friend (in this day of the internet)... Smiley

http://www.camaros.net/forums/archive/index.php/t-84329.html
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
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72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
Ed Bertrand
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« Reply #2 on: January 21, 2014, 10:25:47 AM »

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
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Z10Mike
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« Reply #3 on: January 21, 2014, 10:38:34 AM »

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.
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1968RSZ28
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« Reply #4 on: January 21, 2014, 10:41:22 AM »

Here's the original CRG thread on the topic...  http://www.camaros.org/forum/index.php?topic=1812.0

Paul
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Z10Mike
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« Reply #5 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
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z28z11
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« Reply #6 on: January 21, 2014, 09:27:25 PM »

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
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1968 Z28 BRG/W
1969 Z28 X77 LeMans/W
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