MOTORCYCLE BOLTS AND TORQUE SPECS Always use the proper grade fastener. You should use at least grade 5 fasteners on almost everything on your motorcycle. Bolts are graded by tensile strength and are easily identified by the number of slash marks on the head of the bolt.
Below is a list of bolt torques compiles from various machine tool manufacturers. In general the proper torque spec is usually around 65-70% of the failure torque rate.
*Bolts 1 and 2 (on Torque pattern below) final torque to 100 ft/lb for 350-455; 90 for 301 Pontiac Head Torque Pattern Diagram
Harley's head-bolt torque method harkens back to a time when torque specifications were less scientific. Minton explains that the procedure requires the use of a torque wrench but not for final tightening.
3406 cat engine bolt torque specs - Answered by a verified Technician
If you lost the connecting rod instruction sheet, below are the proper torque specs for our rod bolts Ultra Rod Bolt Material Torque Stretch **Ultra Values based on use of ARP Ultra Lube** SBC H & I-Beams (Std,SJ,LW,XD) BLT145 Ultra 80 ft.lbs. .0055″-.0065″ SBC I-Beam (Std, SJ, LW & XD) BLT145-3.5 MP-3.5 88Read More
The BoxWrench Engine Specs Database is a community resource for mechanics of all skill levels to access a reference library of Firing Orders, Distributor Rotation Directions and Block-Cylinder Numbering as well as Torque Specs, Timing Settings and Cylinder Head Tightening Sequences among other engine specs.
Torque is applied to the fastener in an effort to elastically deform the bolt shank. In the case of bolts and nuts, this elastic deformation between the bolt head and the nut is critical in order to create tension or clamping force to hold the joint together.
Note: Much effort has been made to make sure that these bolt torque specs are accurate. However, it is the user's responsibility to verify that the provided information is correct before using it.
Awesome, thanks man this is exactly what I needed. The kit came with new u-bolts so I should be OK there, I did a search and found torque specs all over the map.
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US Recommended Bolt Torque. Print this page . Size Recommended Torque Grade Grade 8 18 8 S S Bronze Brass Coarse Fine Coarse Fine Coarse Fine Coarse Fine Coarse Fine Coarse Fine 4* 5.2 4.8 , and 8 values are for slightly lubricated bolts. Shop for US Hex Bolts..
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The bolt is stressed up to the proofload value, and if there is no deformation, elongation, or fracture, then the bolt is deemed to have passed. For bolting specifications that do not have a published proofload, it is usually calculated at 92 of minimum yield strength..
FASTENER TORQUE CHARTS BOLT CLAMP LOADS Torque specifications, especially for critical joints, should be determined under actual assembly conditions due to the many variables involved which are difficult to predict and do affect the torque tension relationship..