2014+ Track Bar Bolt Torque Spec 280+ - 320+???
2014+ Track Bar Bolt Torque Spec 280+ - 320+???
So, at the advice of Retired BLM I bought a copy of my service manual from the link on my thread regarding a questions about tie rod pinch nut torque and was super shocked to see the OEM specified track bar bolt torque spec in comparison to the popular Thuren or Carli specs of 200-210 ft-lbs. The OEM specified track bar bolt torque is as follows: Track Bar to Frame - 324 ft lbs, Track Bar to Axle - 285 ft-lbs. I sent this to Don but haven't received feedback from him yet. What am I missing here, why the large discrepancy? The OEM bolt is 18mm and fine threaded (27mm hex head) and a quick google search shows that the specified torque is not out of the range in never never land depending on bolt grade and coefficient of friction. I thought this was interesting. Thoughts?
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
I’ve noticed this also. I went with the higher torque when I’ve replaced mine. Twice. New bolts each time Incase I stretched them...
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
I put 250 on mine when I installed it at 30k miles and 250 again when I removed it for bushing inspection at 75k miles. It’s been good so far.
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
If they are torque to yield bolts. They have a higher torque. If you reuse them. Then you have to use a lower torque spec on them. A torque to yield gets torqued beyond the state of elasticity and therefore undergoes plastic deformation, causing it to become permanently elongated. Traditionally, torque specs are calculated to keep fasteners within their elastic range because maximum clamp load is achieved when the bolt reaches its elastic limit, or “yield” point.
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My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
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AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
They have the appearance of torque to yield bolts but I have no idea if they actually are. That said, I’m still at a loss for why the two most popular suspension options for our trucks recommend so much less than the factory torque value. These are wise folks I’m sure they have their reasoning just curious as to what it is.
I could have another look at service manual but don’t believe I saw anything which would suggest the torque specs supplied were contingent on replacing the OEM track bar bolts.
I could have another look at service manual but don’t believe I saw anything which would suggest the torque specs supplied were contingent on replacing the OEM track bar bolts.
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
That spec sounds high. I’d aim for 215 as Don specs. If you put that bolt to 300+ (if you even own the tools to do it!!!) I think it’s going to yield before then. I don’t think the factory torques it to that level. Heck I’ve got about a 50% failure rate doing installs on rear trackbars where the factory bolt is supposed to go to 130ftlb but it yields to failure at ~100, I keep spare hardware on hand for installs now.
Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
They definitely were tight to remove! I had my IR impact on the Power Tank at 200 psi to knock them out.
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
an m16 grade 10.9 bolt torque value is about 230 ft lbs.
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2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
The new trucks have an M18 if I remember right, fine pitch. The high torque spec would make sense then.Colibri wrote:an m16 grade 10.9 bolt torque value is about 230 ft lbs.
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
A 18x2.5, 10.9 is 318 ft lbs.DamageWagon wrote: ↑Sun Dec 30, 2018 7:48 pmThe new trucks have an M18 if I remember right, fine pitch. The high torque spec would make sense then.Colibri wrote:an m16 grade 10.9 bolt torque value is about 230 ft lbs.
PWOC #53
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
Hot damn, I didn’t realize they upsized to an m18. Nice!
Central Texas and Houston area
2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
Which one of you wants to be the first to put 300lbft on those bolts?
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
You're late to the party. Been there, done that. 315 ft lbs on the 16mm. That's what my Snap-On torque wrench said.Reloaderguy wrote: ↑Mon Dec 31, 2018 10:14 pmWhich one of you wants to be the first to put 300lbft on those bolts?
PWOC #53
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
Jeezuz fawk, snapon pfffffff.RustyPW wrote: ↑Mon Dec 31, 2018 11:07 pmYou're late to the party. Been there, done that. 315 ft lbs on the 16mm. That's what my Snap-On torque wrench said.Reloaderguy wrote: ↑Mon Dec 31, 2018 10:14 pmWhich one of you wants to be the first to put 300lbft on those bolts?
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
Ffffffffffffffff. Pfffffffffffff.
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
What did the Snap-Off bolt head say?RustyPW wrote:You're late to the party. Been there, done that. 315 ft lbs on the 16mm. That's what my Snap-On torque wrench said.Reloaderguy wrote: ↑Mon Dec 31, 2018 10:14 pmWhich one of you wants to be the first to put 300lbft on those bolts?
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Re: 2014+ Track Bar Bolt Torque Spec 280+ - 320+???
Click-'clickDamageWagon wrote: ↑Tue Jan 01, 2019 3:15 pmWhat did the Snap-Off bolt head say?RustyPW wrote:You're late to the party. Been there, done that. 315 ft lbs on the 16mm. That's what my Snap-On torque wrench said.Reloaderguy wrote: ↑Mon Dec 31, 2018 10:14 pmWhich one of you wants to be the first to put 300lbft on those bolts?
PWOC #53
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.