Help wanted: Mechanical Engineers
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Hotshot
Joined: Jan 2011
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From: Puget Sound
This may be an approach you want to try if the PROPER application of threadlocker does not work ( this is an Alex Trebeck comment due to the fact I had no idea you had to add thread locker to a blind hole before you informed me but made the statement as if it was common knowledge).
I agree. What test procedure should I use? Here's a what-if: What if the condition that triggered the slide is no longer there, but now I'm dealing with the avalanche?
Lead Driver
Joined: Jun 2013
Posts: 5,647
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From: north of Minneapolis, MN
After thinking about when I had injectors out, I seem to recall that maybe a stud won't work on the bottom. The way that the hold down clamp is installed probably prevents that.
Posting Guru
Joined: Jun 2008
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From: Albuquerque
I'm still voting on the safety wire path. Lower bolt head over the injector to the upper bolt head. Ya just want it to stop rotating. But thats the ex Air Force crew chief in me speaking. We safety wire everything.
Postmaster
Joined: Jun 2010
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From: Longview, TX
Two separate sets of injectors, second set being new. I'm assuming the injector company wouldn't install previously used hold down brackets on new injectors.
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From: Puget Sound
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Hotshot
Joined: Jan 2011
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From: Puget Sound
Right now, my favorite idea (if it will work) is a lock-nut under the bracket. If I can get a wiz-nut under there the next time I pop the VCs, I'm done. Other than that, I'll have to try the proper application of blue thread-lock to see if I fare better.
Here's a firm answer on the red thread-lock... because I wouldn't want to see anybody fall into that trap:
Blue thread-lock "gives" at about 53 in/lb of torque. So... if I have 130 in/lb on the bolt with the proper application of blue thread-lock, it should take close to 180 in/lb to initially loosen the bolt.
Red thread-lock gives at 270 in/lb of torque, so it would take close to 400 in/lb to convince a 6mm-diameter bolt to come out to play. Does anybody here want a piece of that at injector time? It takes well over 300 degrees to loosen the goop... the heads don't go past about 210 degrees when running (coolant, fuel, and oil in the heads).
Here's a firm answer on the red thread-lock... because I wouldn't want to see anybody fall into that trap:
Blue thread-lock "gives" at about 53 in/lb of torque. So... if I have 130 in/lb on the bolt with the proper application of blue thread-lock, it should take close to 180 in/lb to initially loosen the bolt.
Red thread-lock gives at 270 in/lb of torque, so it would take close to 400 in/lb to convince a 6mm-diameter bolt to come out to play. Does anybody here want a piece of that at injector time? It takes well over 300 degrees to loosen the goop... the heads don't go past about 210 degrees when running (coolant, fuel, and oil in the heads).
Posting Guru
Joined: Aug 2010
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Right now, my favorite idea (if it will work) is a lock-nut under the bracket. If I can get a wiz-nut under there the next time I pop the VCs, I'm done. Other than that, I'll have to try the proper application of blue thread-lock to see if I fare better.
Here's a firm answer on the red thread-lock... because I wouldn't want to see anybody fall into that trap:
Blue thread-lock "gives" at about 53 in/lb of torque. So... if I have 130 in/lb on the bolt with the proper application of blue thread-lock, it should take close to 180 in/lb to initially loosen the bolt.
Red thread-lock gives at 270 in/lb of torque, so it would take close to 400 in/lb to convince a 6mm-diameter bolt to come out to play. Does anybody here want a piece of that at injector time? It takes well over 300 degrees to loosen the goop... the heads don't go past about 210 degrees when running (coolant, fuel, and oil in the heads).
Here's a firm answer on the red thread-lock... because I wouldn't want to see anybody fall into that trap:
Blue thread-lock "gives" at about 53 in/lb of torque. So... if I have 130 in/lb on the bolt with the proper application of blue thread-lock, it should take close to 180 in/lb to initially loosen the bolt.
Red thread-lock gives at 270 in/lb of torque, so it would take close to 400 in/lb to convince a 6mm-diameter bolt to come out to play. Does anybody here want a piece of that at injector time? It takes well over 300 degrees to loosen the goop... the heads don't go past about 210 degrees when running (coolant, fuel, and oil in the heads).
**3M™ Scotch-Weld™ Threadlocker TL42 Blue, 1.69 fl oz/50 mL Bottle, 10 per case
and the technical bulletin for ALL of the 3M,
http://multimedia.3m.com/mws/mediawe...8923671487.pdf
looking at it I would try the TL43 if you can find it, though it shows it is for fasteners larger then 1/2 inch...
and here is the technical bulletin for the Loctite blue.
http://www.loctiteproducts.com/tds/T_LKR_BLUE_tds.pdf
To me it looks like I would try the 3M blue next. It is worth a try. You know the Loctite doesn't do it for you.
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Joined: Aug 2010
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https://www.grainger.com/Grainger/th...071&sst=subset
Looks like Grainger stocks all of them.
You have to specify the Scotch-weld brand, to find them.
Looks like Grainger stocks all of them.
You have to specify the Scotch-weld brand, to find them.
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Hotshot
Joined: Jan 2011
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From: Puget Sound
No higher than about 65 PSI, but the design of the injector puts no lifting pressure on it from the fluids... or I'd have a tough time containing 3000 PSI ICP with a 6mm bolt.