over tightened wheel studs


over tightened wheel studs [850]... posted by david fairhurst  on Thursday, 8 March 2001, at 1:24 p.m.
 

                     Whilst removing the security stud from my front wheels to fit new tyres the security socket sheered. The
                     mechanic was using a manual torque wrench not an air wrench. I estimate he had to apply apply 400 N
                     m. The spec is 110 Nm and I tested other studs at 150 (the max on my torque wrench) My Volvo
                     dealer is going to chisel off the security studs.

                     Question: what is the likelihood of damage to the alloys from either over torquing (how much causes
                     damages?) and by the shock of chiselling off the security studs. Could this cause hair line cracks in the
                     alloys that will only become obvious later?


... posted by Charles Linden  on Thursday, 8 March 2001, at 4:16 p.m. ...in response to "over tightened wheel studs" posted by david fairhurst.

                     I highly doubt any damage was done to the rim. At the worst maybe the paint but I doubt even that. I
                     would be more worried about the rotors, and other misc parts.


... posted by Tony Giverin  on Thursday, 8 March 2001, at 6:48 p.m. ...in response to "over tightened wheel studs" posted by david fairhurst.

                     david,
                     I agree with Charles, the importance of torquing to OEM specs is to prevent damge (warping) to the
                     rotors. Your rims will be fine...just don't scratch them in the attempt to loosen the studs.
                     --
                     Tony G, '94 850GLT, "82 240DL (mint) July '99 "Rolling" cover
 



 
 

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