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Old 02-26-2013, 08:38 AM   #1
Benesesso OP
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Which Loctite To Use?

Yo, Dirty_Sanchez,

Just discovered why the headlight popup motor on my old Toyota MR2 quit working. The internal spline on the steel crank arm stripped, "right to the bone". Was a surprise, as the external spline on the output shaft was like new. I think both parts are soft steel.

With bolting, the slightly larger internal threads of a nut are stronger than the bolt threads, for the same steel strength.

Anyway, getting another motor soon. Plan to remove the crank arm and use a very high shear strength adhesive on the 3/8"spline. Being a former KLR owner, I have saved a few red bottles of various Loctites, including the old red "Stud Lock" and some green "High Strength Retaining Compound" #635. The gap will be very small.

Which one of these will be stronger in shear? Um, BTW, they're both ~30 years old. Dixie.
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Old 02-26-2013, 10:21 AM   #2
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Use the LocTite web site to send a request for technical info. You'll get a response from one of dirty's cohorts. Chances are it'll be the same info you'd get from dirty. If you're not in a rush, he may eventually see this thread.
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Old 02-27-2013, 05:58 AM   #3
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Bene- For basic spline repair on what I suspect cheapo pot metal, I'd go the route of something called 660 Quick Metal. It comes in a grey toothpaste-type of tube. Using a threadlocker in this sort of fix isn't going to work very well at all based on your description.

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Old 02-27-2013, 09:14 AM   #4
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Oooh! I got a question too. What is the shelf life of the Lock tite 242 in the big bottles? We have some old stuff and I wonder if the stuff will still work if it's 5 years old...
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Old 02-27-2013, 12:30 PM   #5
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Bene- For basic spline repair on what I suspect cheapo pot metal, I'd go the route of something called 660 Quick Metal. It comes in a grey toothpaste-type of tube. Using a threadlocker in this sort of fix isn't going to work very well at all based on your description.

Dirty
Thanks. The parts are soft steel, not "pot metal" (usually zinc alloys). I think I'll just epoxy the new spline.
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Old 02-28-2013, 05:43 AM   #6
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Oooh! I got a question too. What is the shelf life of the Lock tite 242 in the big bottles? We have some old stuff and I wonder if the stuff will still work if it's 5 years old...
Officially-it's past it's use by date of two years old.

Anecdotally-I've successfully used 20 year old Gasket Eliminator.

Here's our very own Loctite thread where we try to keep all related questions:

http://advrider.com/forums/showthread.php?t=265016

Dirty
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Old 02-28-2013, 10:58 AM   #7
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Might I ask for comments/observations on the chapstick stuff, or the tape?

I've used the chapsticks, and found it darn convenient. Very easy to work with, not messy at all. Be it the thread lockers or the antiseizes.

Was just given some tape thread locker to try out, but haven't yet.
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Old 02-28-2013, 05:50 PM   #8
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The liquids, sticks, and tape are all different tools and all serve a slightly different purpose.

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Old 03-01-2013, 03:42 AM   #9
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Originally Posted by dirty_sanchez View Post
The liquids, sticks, and tape are all different tools and all serve a slightly different purpose.

Dirty
OK, (confused).

All three are Loctite blue or red thread lockers. Darned if I see how they are supposed to be serving different purposes.

I've had bottles of the liquid harden up on me. And it's a bit messy to work with.

The chapstick stuff doesn't seem to ever go bad, but it doesn't seem to set up as strongly as the liquid. Darn easy and neat to work with.

No experience with the tape yet. Not sure that I'll find it convenient at all, considering how much fun I don't have with teflon tape when doing plumbing.
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Old 03-01-2013, 04:41 AM   #10
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I've had bottles of the liquid harden up on me. And it's a bit messy to work with.
Never happened to me. Still have some that's over 30 years old. They may or may not develop full strength, but they are still liquid and still harden in threads. Once in a while (every few years) I'd remove the cap and give the bottles a few squeezes to get more air/O2 inside.

I keep them in my garage refrigerator. Almost out of the blue one, guess I'll have to break down and buy another bottle--and some more primer T.
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Old 03-01-2013, 04:46 AM   #11
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Like painting preparation and primer are keys to success.
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Old 03-01-2013, 11:20 PM   #12
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Originally Posted by dirty_sanchez View Post
Officially-it's past it's use by date of two years old.

Anecdotally-I've successfully used 20 year old Gasket Eliminator.

Here's our very own Loctite thread where we try to keep all related questions:

http://advrider.com/forums/showthread.php?t=265016

Dirty
The single greatest collection of all things loctite. Its mind blowing
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Old 03-02-2013, 04:14 AM   #13
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The single greatest collection of all things loctite. Its mind blowing
Absolutely! I wonder if it's possible for the mods to append/integrate this thread into the original and sticky the original.

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