Lug Nuts

[miclri]

Recently I ordered a set of snows mounted on steel wheels from the TireRack for my 2003 Sierra. The dealer installed the snows. From the dealer I ordered center caps and threaded lug nuts. I installed the center caps last night.

 

I used a 7/8" socket to replace the lug nuts. It felt a little loose but so did the 22 mm socket. What is the correct socket size?

 

And the owners manual specified that the lug nuts should be tightened to 140 ft-lbs. My other cars require something like 90 ft-lbs so the 140 number seemed high. Is it? Would the torque specification be different for the aluminum wheels?

 

BTW It was a b@#ch getting the lug nuts off. I sheared a Craftsman extension dohickey in the process.

[RyanbabZ71]

I have used a 7/8" socket since new.  I have removed my tired a bunch of times (different reasons).  No problems yet.

[RyanbabZ71]

I checked the helms manual and cant find anything definite except the wheel nuts are M14 X 1.5 (The M is for metric)

 

But it also states the rim is a 16x6.5 in the manual which is untrue it is a 16x7

[MadFish]

the 140 ft.lbs. should be correct. Trucks get more of a Torque spec then cars. I dont know if it would be different for aluminum wheels or not.

[99silveradoz71]

Yes, Ryan suggested the 7/8 to me and it works fine.  Also, the local Firestone shop was concerned with the 140, but I told them that was the spec.  I've had them off and on once or twice myself with no problems.

[WEFs99]

My 99 Sierra is 140 ft. lbs., my son's 93 K2500LD is 120 ft. lbs.  140 does sound high but that is the figure.

[bowtie_pasta]

140   Better have an impact wrench handy!

[Shaners]

But it also states the rim is a 16x6.5 in the manual which is untrue it is a 16x7

I think the stock steel rims are 16x6.5 and the optional aliminum rims are 16x7.  I think the HD rims are 6.5's though for both steel and aluminum.

[RyanbabZ71]

Shaners the helms manual has info for each type of tire (steel, chrome, and alum) they each state 16 x 6.5 which is another error i have found

[miclri]

Thanks for all the info. I was concerned that at 140 ft-lbs I would round-off the lug nuts with the 7/8" socket.