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Author Topic: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.  (Read 9659 times)

Offline BIG RED 1983

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83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
« on: May 15, 2016, 07:31:52 pm »
Guys, I need the leaf spring bolt torque specs.
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Offline Blazin

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Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
« Reply #1 on: May 15, 2016, 08:19:39 pm »
German spec.
Goodntight.
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Offline Irish_Alley

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Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
« Reply #2 on: May 18, 2016, 01:03:20 pm »
These are for grade 8 bolts Recommended Torque
Bolt size  coarse/fine
1/4                  9/10
5/16              18/20
3/8                33/37
7/16              52/58
1/2                80/90
9/16            115/129
5/8              159/180
3/4              282/315
7/8              454/501
1                  682/764
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Offline VileZambonie

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Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
« Reply #3 on: May 18, 2016, 08:44:24 pm »
Be very careful as tightening these to spec will often destroy the bushings. As you work towards spec don't keep going if it's compressing the bushing.

Torque leaf spring-to-frame attaching nut to 92 ft. lbs
Torque leaf spring-to-axle attaching nuts in a diagonal sequence first to 18 ft. lbs. then to 80 ft. lbs final torque in chart
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Offline BIG RED 1983

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Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
« Reply #4 on: May 20, 2016, 07:54:20 pm »
Ok. Thanks for the answers. I have just installed Cal-tracs and the tech from Calvert Racing said to just use 2 box end wrenches and tighten as good as i could by hand.
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Offline VileZambonie

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Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
« Reply #5 on: May 20, 2016, 08:05:37 pm »
Let us know how you like them
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Blazin

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Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
« Reply #6 on: May 22, 2016, 07:10:59 pm »
I go until the bushing starts to squish, then a 1/2 to 3/4 turn.
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