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post #1 of 27 (permalink) Old 10-12-2009, 09:21 AM Thread Starter
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Snapping Lug Studs

hey quik question for ya guys, have any of you run into lug studs snapping?
my car is only a year old and ive already gone through four studs 3 on the front passengers side and 1 on the front drivers side and every time the dealership denies me warrenty service because i have aftermarket wheels, and at this point im almmost wonderign if theyre the cause because im not smackin curbs like its my job and im not burnin rubber off everystop sign i roll up to. i have motegi MR2378 F77 16" rims. i got them off my uncle from his 06 ION and he never had problems, same backspacing and everything so im pretty much clueless as to whats causing them to snap, any suggestions would be appreciated

PS Im positive im not over torquing the nuts either

L.P.~LT

Last edited by L.P.~LT; 10-12-2009 at 09:24 AM.
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post #2 of 27 (permalink) Old 10-12-2009, 09:29 AM
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do you use aftermarket lug nuts? and how hard are you torqueing them down
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post #3 of 27 (permalink) Old 10-12-2009, 10:13 AM
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x2. if youre running stock lug nuts that could be why
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post #4 of 27 (permalink) Old 10-12-2009, 10:36 AM
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If you are not torqueing the lugs to proper specs, it will happen. The Cobalt lugs do not handle the old fashioned German "Gudntite" torqueing. I snapped two when I installed my aftermarket rims by not torquing to specs, 100Ft/Lbs according to Haynes.
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post #5 of 27 (permalink) Old 10-12-2009, 11:02 AM
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HAHA I just had one break off about 2 weeks ago, i flipped out cuz i didnt know those things could even break. its all fixed now. and yea, i was over torqueing mine cuz i was just gettin them as tight as i could... i now do them at 100ft/lbs cuz thats what the manual says. However, w/ my aftermarket rims, they're tight tolerance so i HAVE to have acorn/spline drive lug nuts (i have the spline drive)... but im still using 100ft/lbs...


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post #6 of 27 (permalink) Old 10-12-2009, 11:10 AM
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i do mine to 85ft lbs and awhile back when i had my wheels balenced all 4 of my lugs on driver rear snaped and i got a pavment ride and broke one of my springs

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post #7 of 27 (permalink) Old 10-12-2009, 12:55 PM Thread Starter
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alright thanx guys ill go double check make sure im torquing to spec but im pretty sure thats what i torqued em to on my first rotation (about 100ft. lbs)
but the dealership was the last people who put em on last so if its anything over or under im gonna go and throw a fit lol oo and by the way for the guys who asked i use after market spline drive lug nuts

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post #8 of 27 (permalink) Old 10-12-2009, 05:34 PM
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well i used aftermarket lug nuts and they made my ride pretty harsh like when i braked and it didnt properly mount the rims on they dont sit as well as the stock ones do i put my stock ones back on and they are torqued to 90 ft/lbs and ive had no problems so faR. most common way this happens is someone tightens them using an air gun and dont release how tight they put them on
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post #9 of 27 (permalink) Old 10-12-2009, 05:50 PM
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haha i'm steady rollin 3 lug conversion on all 4's... it's gangsta..

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post #10 of 27 (permalink) Old 10-12-2009, 06:12 PM
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haha i'm steady rollin 3 lug conversion on all 4's... it's gangsta..
doesnt more lugs help keep the wheels on better? lol

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Mods: MB SevenX 16" rims, painted bowtie, 350 Watt Kenwood amp and JL Audio sub, Red Razo sport pedals, K&N SRI, PPE Engineering header and downpipe, Tsudo exhaust, coupe style wing (yes! that's it...for now)

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