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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Topic started by: BIG RED 1983 on May 15, 2016, 07:31:52 pm

Title: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
Post by: BIG RED 1983 on May 15, 2016, 07:31:52 pm

Guys, I need the leaf spring bolt torque specs.

Title: Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
Post by: Blazin on May 15, 2016, 08:19:39 pm

German spec.
Goodntight.

Title: Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
Post by: Irish_Alley 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

Title: Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
Post by: VileZambonie 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

Title: Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
Post by: BIG RED 1983 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.

Title: Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
Post by: VileZambonie on May 20, 2016, 08:05:37 pm

Let us know how you like them

Title: Re: 83 C10 LWB/NEED LEAF SPRING BOLT TORQUE SPECS.
Post by: Blazin on May 22, 2016, 07:10:59 pm

I go until the bushing starts to squish, then a 1/2 to 3/4 turn.