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Author Topic: Torque wrenches, Bolts, Torque to Yield  (Read 2088 times)

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Online Flyin6

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Torque wrenches, Bolts, Torque to Yield
« on: December 18, 2018, 09:57:41 AM »
OK, I'm not far from diving into this LS motor I'm modifying in my Suburban

Up to this point I have remained old school, simply torquing fasteners to the proper "Tightness."

However we are in a newer age of torque to yield fasteners. You tighten the bolt to a given torque setting, then rotate it "X" number of degrees further to apply the required stretch to said fastener.

So I'd like to discuss the logic and good and bad in all of this

With respect to my LS engine, I could purchase inexpensive factory type bolts for less than $50, then destroy them in their one and only tightening. Or I could purchase some old school bolts and simply tighten them to the required torque and call it a day. The latter bolts seem to be quite spendy, raising interest in their cheaper counterparts

Then the question of the torque wrench comes to mind. I have the standard selection of beam deflection and click type wrenches in 3/8" and 1/2". But looking at these new angle finding torque wrenches, the cost gets up there PDQ.

So what is a good, not too expensive torque wrench that can stretch these LS bolts properly???
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Offline KensAuto

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #1 on: December 18, 2018, 10:11:34 AM »
Rather than buy a cheap angle meter style electronic wrench, (good ones are 350+), I would opt for a decent clicker style,  then a mechanical adapter to get the angle.  It can be a tight fit on the rear bolts but you can figure out a workaround.
...the 90 or 180 degree specs are pretty easy.
Possible for a guy to just mark the bolt and turn it 1/4 or half turn.
I'm sure someone will cringe at that statement,  but it does work in a pinch.
...I don't remember LS torque numbers tho.

These are the tools I used to use before they offered electronic torque wrenches for sale. 
The bottom snap on one cost me 6 bills back in the day.
« Last Edit: December 18, 2018, 10:16:13 AM by KensAuto »
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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #2 on: December 18, 2018, 10:28:00 AM »
Ya, Ken, the prices were scaring me. I have decent click type, time for an upgrade and then add one of these to get the stretch:
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Offline wilsonphil

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #3 on: December 18, 2018, 10:45:53 AM »
Don, I recommend a good click type also if you want to stay reasonable on price, CDI which Snapon owns now makes ALL of the torque wrenches Snapon sells, CDI still has their own branded line that is sold thru many outlets McMaster being one of them.  You can get a CDI wrench from Mcmaster  30-150Ftlbs 1/2 drive for around $200

You could buy a used unit and have it sent out for Calibration or if you go the new route they should come ready to go with the NIST calibration.  The electronic units are nice as they have lights, sounds, and some have stick shaker function so you would feel right at home. 

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #4 on: December 18, 2018, 11:45:26 AM »
Stick shaker...

If you only knew

Next thing you hear the electronic man say is:

"Don't sink, Don't sink"

I like that route. Click type, goodin' and the angle wheel of bolt death.
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Offline wilsonphil

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #5 on: December 18, 2018, 12:05:57 PM »
Yep the new wiz bang torgue wrenches from Snapon have the vibrating love handle now!

Very fimuilar with the shaker stick Don, GPWS and all the fun stuff!

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #6 on: December 18, 2018, 05:17:14 PM »
Yep the new wiz bang torgue wrenches from Snapon have the vibrating love handle now!

Very fimuilar with the shaker stick Don, GPWS and all the fun stuff!
Are you typed in something heavy with all that jazz?

Unfortunately I got three. The CL-65, CL-700 (Really just differences training for that one,) and the EMB-120
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Offline wilsonphil

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #7 on: December 21, 2018, 11:29:36 AM »
those are not the end of the world, there are worse things to fly for a living!

Hawker 400 (third world business jet)
Westwind (now Gulfstream, a Kenworth that flies, used to be a Rockwell but IAI bought it back in the day)
G2/3/4 (as in Gulfstream) miss them but not the industry!

Way back in the day C141/C5/C130 and too many otheres to count but that was when I was a worker bee wrench, I miss aviation but not the headaches or dealing with owners.
« Last Edit: December 21, 2018, 11:37:03 AM by wilsonphil »

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #8 on: December 21, 2018, 04:04:22 PM »
I have to amend what I was saying. I like flying the Canadair, great plane IMO. The 700 has straight legs and can be a bear to land, 65 has trailing arms. But getting typed at Comair???!!!

Just ask anyone in the industry. There is the Comair type rating and then there's everyone else. We had to memorize 100+ emergency procedures/boxed items. Had to memorize a lot of our FAA regs. Had to know systems inside and out. Other airlines I'd jumpseat on would ask me questions enroute because they had heard that Comair pilots knew (were required to know) Psycho amounts of information about those RJ's.

For me, no big deal. The Army was exactly the same. "Explain to me the metallurgy and machine process of this rivet. Include references to the casting, forging and annealing process. Explain where the metal is mined and processed and elaborate on the preflight criteria for this rivet. When you're done elaborate on the relationship this rivet has with those around it, include examples from the creation of the universe and the foundations of life. Give three references of how God intervened in the process of this rivet becoming a rivet...
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Offline wilsonphil

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #9 on: December 21, 2018, 05:03:14 PM »
Bombardier makes a good aircraft, no complaints.  In the Business Jet world the Challenger is a very good unit.

You should of went part 135 Don you might of liked that more, ATP I wold never in a 100yrs even think about that.

way too many rejects in the business/entertainment side of the business and when things go bad the first thing that goes is the jet!

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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #10 on: December 21, 2018, 10:04:57 PM »
Bombardier makes a good aircraft, no complaints.  In the Business Jet world the Challenger is a very good unit.

You should of went part 135 Don you might of liked that more, ATP I wold never in a 100yrs even think about that.

way too many rejects in the business/entertainment side of the business and when things go bad the first thing that goes is the jet!
That's why I do the contractor/combat pilot thing

I'm a big fish in a very small pond

The money we make dwarfs what the starch wing guys get.

And if you one who can fly jets and helos, NVG under fire, you command the best.

No braggin' but I wouldn't work under 30K a month...
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Re: Torque wrenches, Bolts, Torque to Yield
« Reply #11 on: December 21, 2018, 10:07:14 PM »
BTW, I ordered the scale device that attaches to the torque wrench
Site owner    Isaiah 6:8, Psalm 91 
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