I dont know what they used,I assume it was red,blue? but steel allen head bolts bolting a shaft to aluminum plate ,it looks to be 3/8,but its metric.


Wonder what temp will make red locktite fail?

You are not hard on your equipment. What did you have a bolt back out on?

another thing about loctite, if used repeatedly... part of the prep includes chasing the threads, loctite builds up wit repeated use clogging the threads and making the fastener act as if its stripped greatly reducing clamping force.

+1 dries but doesn't hold chit :eekdrop:

When installing the fastener Loctite is also a lubricant so you need to torque the fasten as a lubricated part vs. dry. Look at a torque table that shows both dry and wet torque. Their also are primers for Loctite.
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I use loctite on flywheel bolts, coupler/flexplates, tiebars and bolts inside my superchargers when I rebuild them. Never had one come loose.

thread locking compounds are NOT what are used to hold the parts together. they are the last line of defense for vibration and shock and are never considered as part of the " design" in a hardware solution. if the bolt fell out its not because " the locktite failed" . the locktite wasn't supposed to be holding it together in the first place. if it fell out there was something basic wrong with the way it was installed or with the hardware selection or concept in the first place... i mean, think about it... using a grade 8 allen head in a piece of theaded al.. thats probably a 160,000 psi bolt that requires significant stress to stretch it to preload... are those al threads going to tolerate that without yield ? and what happens when the al warms up and expands while that piece of hardware grows about 60 % less ? it looses its preload... thats what. you can't glue your hardware in to compensate for a bad installation and then when it fails blame the glue. thats like blaming the oil pan when the connecting rod is laying in the bilge

Used as cylinder sleave set! That will get the job done. To the OP...sounds to me like they didnt torque the bolts properly.

As someone mentioned earlier, use the loctite brand. I have had small set screws come loose in a high vibration situation (snowmobile primary clutch) with other brand products. With red loctite I never had a problem.

Take a hammer and flatten the threads, locktite it, and over torque it. Then after you sell the boat and the new guy finds it, blame it on the former owner.