Torque Spec for Bolt that holds front disc?
04-04-2008, 05:15 PM
#1
4th Gear
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Torque Spec for Bolt that holds front disc?
I'm looking for the Torque Specification for the bolt spindle seen on this picture. It holds the disc in place. #33370
Anyone have this info?
Thanks
Anyone have this info?
Thanks
04-04-2008, 09:44 PM
#3
C6 the C5 of tomorrow
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No torque!
It should be slightly loose in fact...
Proper adjustment is to snugit up then back off to the first position you can put the cotter pin in.
It should be slightly loose in fact...
Proper adjustment is to snugit up then back off to the first position you can put the cotter pin in.
04-04-2008, 10:27 PM
#4
Racer
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i agree to no torque. I've seen people tighten it snug with a wrench and back it way off,ensuring everything seated completely. I usually tighten it by hand,spin it a few times,try and tighten it again,then back it off 1/4 turn or so.As long as it doesn't shift side to side when wiggled by hands or drag when you spin it.Any kind of drag will wear the bearing prematurely and the bearings will be purple in color from heat . If your bearings are discolored at all they were too tight at one time, replace these bearings with new.Don't be misled by your calipers pads dragging and think its too tight.
04-09-2008, 11:15 AM
#6
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St. Jude Donor '07
Read the part of this article about bearing setup: http://www.idavette.net/hib/BBfHInet12.htm
Make sure you have the endplay set right, or you'll be replacing them sooner than you like.
Make sure you have the endplay set right, or you'll be replacing them sooner than you like.
04-09-2008, 11:20 AM
#7
Team Owner
If you put significant torque on that nut, then back it off...you run the risk of flat-spotting the bearings. It's best to make sure the races are seated fully (using a brass drift and hammer), rather than forcing them into place with the nut.
04-09-2008, 11:29 AM
#8
Race Director
From my 81 service manual:
1) Torque the spindle nut to 12 foot pounds while rotating the spindle.
2) Back off the nut and then retighten to finger tight.
3) Loosen the nut until you can put through the cotter pin, but no more than 1/2 flat.
Not sure what you're supposed to do with more than 1/2 flat. The final runout should be between 1 and 5 thou. Not tight or, as everyone above has said, it won't live long.
1) Torque the spindle nut to 12 foot pounds while rotating the spindle.
2) Back off the nut and then retighten to finger tight.
3) Loosen the nut until you can put through the cotter pin, but no more than 1/2 flat.
Not sure what you're supposed to do with more than 1/2 flat. The final runout should be between 1 and 5 thou. Not tight or, as everyone above has said, it won't live long.
04-09-2008, 03:37 PM
#10
Team Owner
12 ft-lbs is not enough torque to Brinell the bearings. But if you were to try to 'seat' the bearing races with that nut, you would have to apply more than that amount of torque.