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#1 |
Stepsides Are Bedder
Join Date: Feb 2004
Location: Norco, CA
Posts: 238
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Upper Ball Joint Bolt Torque @ 45lb-ft???
The factory manual calls out for 45lb-ft bolt torque for the 4 upper ball joint securing bolts on a '70 Chevy C-10. I can snap a 5-16/18 grade 8 bolt before I get even close to that number. Does anyone have any suggestions?
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#2 |
Mike
Join Date: Jan 2003
Location: west chester pa
Posts: 2,474
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That is almost double what a 5/16th should be torqued to!Here is a chart that calls for 24-27 ft#,....http://www.boltdepot.com/fastener-in...ed-Torque.aspx
__________________
70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires |
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#3 |
Stepsides Are Bedder
Join Date: Feb 2004
Location: Norco, CA
Posts: 238
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Yeah, I saw similar torque values elsewhere on the web. The upper ball joints were the original (riveted) variety, and I had to grind off the heads of the rivets and punch them oout. The replacement ball joints (from LMC Truck) came with 8mm ungraded bolts, which I stripped out at about 20 lb-ft. I then brought some 5/16-18 grade 8 bolts home from work, which I snapped at less than 35 lb-ft. I miked the ID of the factory holes and they are punched to an ID of 0.360", so I decided to drill the ball joints and control arms out to 0.375" and use 3/8-16 grade 8 bolts, which torque to about 44 lb-ft. Better not to have so much play in the bolt holes (over 0.040") anyway, I'm thinkin'...and maybe that's what the factory intended.
Thanks for your help! |
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