GMCforum: GMCnet » Lug nut torque

Home » Public Forums » GMCnet » Lug nut torque

Show: Today's Messages :: Polls :: Message Navigator

Lug nut torque [message #185109]

Wed, 19 September 2012 16:56

Bill Backouris

Messages: 39
Registered: July 2005

Karma: 0

Member

Hello everyone, would just like to confirm, on the stock 16.5" steel wheels, the torque is 250 ft lbs??? seems like we would be snapping studs if that number is correct.

Thanks
Bill Backouris
77 Birchaven 455
Garden Grove ca

Report message to a moderator

Re: [GMCnet] Lug nut torque [message #185111 is a reply to message #185109]

Wed, 19 September 2012 17:06

James Hupy

Messages: 6806
Registered: May 2010

Karma: -62

Senior Member

That is what the service manual says on DRY studs and nuts. If you look on
any fasteners torque chart for 9/16 in NF grade 8 bolts, you can get to
yield tension at about 100 ft lbs less than that figure. If you lube them,
even less. My personal experience tells me that is way too tight on used
fasteners.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Sep 19, 2012 2:57 PM, "Bill Backouris" <bkbackouris@hotmail.com> wrote:

>
>
> Hello everyone, would just like to confirm, on the stock 16.5" steel
> wheels, the torque is 250 ft lbs??? seems like we would be snapping studs
> if that number is correct.
>
> Thanks
> Bill Backouris
> 77 Birchaven 455
> Garden Grove ca
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Report message to a moderator

Re: [GMCnet] Lug nut torque [message #185150 is a reply to message #185109]

Thu, 20 September 2012 07:45

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

G'day,

The manual is incorrect and was revised to one hundred and fifty foot pounds (150).

Regards,
Rob M.

-----Original Message-----
From: Bill Backouris

Hello everyone, would just like to confirm, on the stock 16.5" steel wheels, the torque is 250 ft lbs??? seems like we would be
snapping studs if that number is correct.

Thanks
Bill Backouris

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

Report message to a moderator

Re: [GMCnet] Lug nut torque [message #185159 is a reply to message #185150]

Thu, 20 September 2012 08:33

Richard Denney

Messages: 920
Registered: April 2010

Karma: 9

Senior Member

On Thu, Sep 20, 2012 at 8:45 AM, Rob Mueller <robmueller@iinet.net.au> wrote:
> G'day,
>
> The manual is incorrect and was revised to one hundred and fifty foot pounds (150).

Which is a reasonable number when you use anti-sieze lubricant, which
you should.

The difference is the fixed flange on the stock nuts, versus the
captive washers on Alcoa nuts or separate washers on the Eagle wheels.
With the fixed flange nut, the torque reading will be confused by the
much greater friction between the flange and the wheel. Using an
anti-sieze lube greatly diminishes that problem, and a reasonable
torque can be used.

Rick "thinking snapped lugs are a lot more common than loose nuts" Denney

--
'73 230 "Jaws"
Northern Virginia
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Report message to a moderator

Re: [GMCnet] Lug nut torque [message #185160 is a reply to message #185159]

Thu, 20 September 2012 08:52

Bill Backouris

Messages: 39
Registered: July 2005

Karma: 0

Member

Great Guys, thank you, this saves me from having to purchase another wrench

Bill Backouris
77 Birchaven 455
Garden Grove Ca

Report message to a moderator

Re: [GMCnet] Lug nut torque [message #185220 is a reply to message #185150]

Thu, 20 September 2012 19:59

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma: 9

Senior Member

At GMCES during a related discussion, one of our morre experienced members
recounted a recent incident: Someone with lug-centered Eagle wheels had
some problems which resulted in them replacing the studs on one hub. 3 of
8 studs were necked down and cracked 1/2 way through. Obviously the result
of 240 ft-lb cycles. Might serve as a word to the wise. With ~100,000
miles on my coach since I bought it with Alcoas already installed before
59,000 miles, I'm pretty confident of my studs. If I acquired a coach with
steel wheels still installed, I'd VERY CAREFULLY inspect all the studs --
would probably even replace them as I removed the hubs for brake and
bearing servicing.

JWID,

Ken H.

On Thu, Sep 20, 2012 at 8:45 AM, Rob Mueller wrote:

> G'day,
>
> The manual is incorrect and was revised to one hundred and fifty foot
> pounds (150).
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: Bill Backouris
>
> Hello everyone, would just like to confirm, on the stock 16.5" steel
> wheels, the torque is 250 ft lbs??? seems like we would be
> snapping studs if that number is correct.
>
> Thanks
> Bill Backouris
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

Report message to a moderator

Previous Topic:	[GMCnet] Gold GMC Stickers
Next Topic:	Come on, Lets Go

Goto Forum:

-=] Back to Top [=-

Current Time: Fri Sep 20 04:49:30 CDT 2024

Total time taken to generate the page: 0.12205 seconds