Lug nut Torq?

[97one]

Originally Posted by chevyss

Dealer says 100

WARNING.... Your Dealer is a Complete IDIOT !
If he don't know a VERY simple thing like this what else don't he know?
Find another DEALER .
.................................................. ................................

[Nine Ball]

140 is brutally high. That has to be a misprint!

All my other 14mm lug cars have been 100 ft-lbs. That is what I use.

Here is a good reference, our cars have 14mm x 1.5 studs, it shows 85-90 ft-lbs as typical. Only a 9/16 lug is in that 140 range.

http://www.tirerack.com/wheels/tech/...jsp?techid=107

[97one]

Originally Posted by Nine Ball

140 is brutally high. That has to be a misprint!

All my other 14mm lug cars have been 100 ft-lbs. That is what I use.

Here is a good reference, our cars have 14mm x 1.5 studs, it shows 85-90 ft-lbs as typical. Only a 9/16 lug is in that 140 range.

http://www.tirerack.com/wheels/tech/...jsp?techid=107

No misprint !! 140 is CORRECT...
I have to run, will post later...............

['69 Maro Man]

I've always, for 30 yrs, set my breaker bar for 100 ft-lbs on all my cars. Perhaps the new Maro HP beast requires higher torque to keep the huge wheels from flying off? At the very least the dealer and Detroit should use the same capacity.

[Russell James]

It's a GVW thing. The same lug nut and stud used on various vehicles could have a wide range of torque specs - but all based on the GVW of the vehicle. Tirerack is in left field if they are basing it on stud size.

It's like tire pressure. It's based on the vehicle, not the tire.

i.e. Corvette 100 lb/ft
G8 125
CTS-V 140
Camaro 140

see the GVW weight to lb/ft lug nut tq correlation.

[T_MECO]

I'm going with the 140 ib/ft like the manual prescribes

[97one]

Originally Posted by Nine Ball

140 is brutally high. That has to be a misprint!

All my other 14mm lug cars have been 100 ft-lbs. That is what I use.

Here is a good reference, our cars have 14mm x 1.5 studs, it shows 85-90 ft-lbs as typical. Only a 9/16 lug is in that 140 range.

http://www.tirerack.com/wheels/tech/...jsp?techid=107

Sorry for my brief prior post.
The question was: How much should the lug nuts be torq'd down? i want to make sure I don't over/under tighten them.
The answer is: 140lbs. .... Like others have said before.

That is NOT MY opinion, it is A FACT, from GM
It is Not brutally high it is very much in line with all of my other vehicles I have now & have had in the past.

The size of the stud is only one of many factors in detremining the torque for the vehicle.

So if YOU want to lower your torque 28% thats fine, but it is not the correct answer to the question.
You could also: lower your tire perssure 28% to 26lbs. or run your V8 on 87 octane etc...... But that is NOT what GM calls for & yes you may not have a problem from doing so.

The point is 140lbs. is not a misprint.

[8ty8 ls1]

100 lb ft is fine. every single one of my cars (including my fathers cts-v) has never seen more than 100. i'll stick with my experience.

[jol13]

From another member:

Service Information
Home Publications Number Search New Bulletins Bulletin Search Feedback Help

2010 Chevrolet Camaro | Camaro Service Manual | Document ID: 2210980
Fastener Tightening Specifications

Application

Specification

Metric


English

Wheel Nut Torque 140 N·m 100 lb ft

http://www.camaro5.com/forums/showth...&highlight=Lug

It seems that there is reasonable evidence justifying both 100 and 140 ft lb. I torqued mine to 100, and check it weekly.

[Nine Ball]

Originally Posted by 97one

Sorry for my brief prior post.
The question was: How much should the lug nuts be torq'd down? i want to make sure I don't over/under tighten them.
The answer is: 140lbs. .... Like others have said before.

That is NOT MY opinion, it is A FACT, from GM
It is Not brutally high it is very much in line with all of my other vehicles I have now & have had in the past.

The size of the stud is only one of many factors in detremining the torque for the vehicle.

So if YOU want to lower your torque 28% thats fine, but it is not the correct answer to the question.
You could also: lower your tire perssure 28% to 26lbs. or run your V8 on 87 octane etc...... But that is NOT what GM calls for & yes you may not have a problem from doing so.

The point is 140lbs. is not a misprint.

The Camaro Service Manual says 140 Newton Meters, which is 100 ft-lbs. I guarantee your owners manual is not the reference used when repairing a car. Every form of documentation has an order of importance, and users manuals have never been considered gospel. The FACT is that GM has provided two (or more) different answers to this question. Please lose the attitude, we are all trying to get the most accurate info here.

[67 GTO]

Originally Posted by Nine Ball

The Camaro Service Manual says 140 Newton Meters, which is 100 ft-lbs. I guarantee your owners manual is not the reference used when repairing a car. Every form of documentation has an order of importance, and users manuals have never been considered gospel. The FACT is that GM has provided two (or more) different answers to this question. Please lose the attitude, we are all trying to get the most accurate info here.

I would just like to get this right since I've changed to after market wheels.
The owners manual says 190 N.m (metric) and 140 ft lbs (english)

I torqued mine to the 140 ft lb spec and it does seem to be a bit much. I had to lean on my wrench to get there and would rather go to the less value.

[Cyber_Gray_Autobot]

The tire place torqued mine to 140 ft lb as well. They thought it was high but we were going with the owner's manual. I have not had any vibration in the new tires and everything seems fine but hopefully when I take them off the first time nothing is stripped.

[Nine Ball]

Interestingly, I looked in the owners manual for our previous 2008 Cadillac CTS. Same 14mm x 1.5 lug studs, heavier car (4200 lbs CTS vs 3800 lbs Camaro) and GM recommends 100 ft-lbs.

Now I'm wondering what the V6 Camaro owners manual says. Anyone got a V6 Camaro that can check it out for us? It could be that the 100 ft-lb references are for the V6, 140 for the SS. Need to confirm...

[97one]

Originally Posted by Nine Ball

Interestingly, I looked in the owners manual for our previous 2008 Cadillac CTS. Same 14mm x 1.5 lug studs, heavier car (4200 lbs CTS vs 3800 lbs Camaro) and GM recommends 100 ft-lbs.

Now I'm wondering what the V6 Camaro owners manual says. Anyone got a V6 Camaro that can check it out for us? It could be that the 100 ft-lb references are for the V6, 140 for the SS. Need to confirm...

The V6 manual says; 140lbs.