NEED HELP Bolt torque

Dave 26

Original poster
Member
Sep 8, 2021
18
NJ
Hi
Attempting to replace wheel hub on 08 TB. I watched the video on 1Aauto the guy showed the 3 18mm hub bolts to be torqued at 90 ft-lbs OK thats what I did .I now see factory spec 77ft-lbs. I already did 90. can they be re-torqued or do I need new bolts?
 

mrrsm

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Supporting Donor
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Oct 22, 2015
7,989
Tampa Bay Area
I may be wrong about a similarity between the Triple Fastener Hardware matching between the GMT360 vs. THESE meant for the GMT800 Trucks. But consider that these 10.9 Hard Fasteners (if identical) are made of VERY High Grade Steel and since they are NOT Torque To Yield in their design...unfastening and re-tightening the ones on your Wheel Hubs should be fine. Look into the Dorman Brand Replacements shown below ...and if these DO fit your Vehicle... They are most easily done NOW... so that that you will have the Peace Of Mind in their installation safety:

49490131736_c0655f0cba_c.jpg49489661398_b8b353aee9_o.jpg49490370537_15e0a13761_o.jpg49490163601_44b1fa02d0_o.jpg49489661358_d9caf7f1a8_o.jpg
 

mrrsm

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Oct 22, 2015
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Tampa Bay Area
The OP is wise to show concern about this issue. For anyone else thinking that exceeding the upper limits of the recommended Torque as happened in this case by as much as 13 Foot Pounds ( 90 FP vs. 77 FP) is "OK" ... consider that whenever this excessive torque action is applied, the additional Mechanical Stress being placed upon the Wheel Hub Housing is ENORMOUS.

In fact, it is more than enough to place a definite strain and warp of the Wheel Bearing Outer Housing and invite Pre-Mature Wheel Hub Bearing Failure. Observe these 3D Bolt to Flange Stress Diagrams and follow the Path of Stress Transmission though the Flanges and Flats as it moves up into the Housing... changing its shape in the process.

Stress-at-the-maximum-external-load-large.png

symmetry-bolts.png

So... Just HONKING DOWN on those Three Beefy Bolts can have unintended consequences.
 
Last edited:

Mooseman

Moderator
Dec 4, 2011
25,671
Ottawa, ON
They'll be fine. Drive and be happy. The extra 13 ft.lbs won't do anything.
 

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