Loctite

[info@resilicon.com]

Where do you drip the loctite? On the thread themselves or under the bolthead? I had on mechanic told me it was on the thread and another told me it was under the bolthead. Which one is it?


Thanks

[thomas]

Re: Loctite

I've always been taught the thread. The purpose of loctite is too hold a bolt in place. On the thread will do this, under the head will not. You normally want lube under the bolt head to get a friction free tightening to the proper torque. Also, if you ever get pre-loctited bolts, it is on the thread.

[Technical Support]

Re: Loctite

Thread only. It's called threadlocker for a reason ;)

[info@resilicon.com]

Re: Loctite

OK. Thanks . What about the Anti-Seize liquid? On the thread or under bolt head?

[Technical Support]

Re: Loctite

You don't use it on anything. But for things that take it, thread. No heads get any kind of treatments, they do not hold the torque.

[Bill O'Neal2]

Re: Loctite

Some of the early manuals said to use Blue Loc-Tite on the threads and the heads of the flanged bolts.
The reason was to hold the bolt into the theaded bolt hole and to work as a sealant on the flange.
Loc-Tite is not only a thread locker, but a sealant as well.

I have known mechanics that swear by using anti-sieze in place of thread lockers, especially in a corrosive atmosphere, such as on a watercraft motor. If properly torqued, the bolts will not back out.

[John Kubiak]

Re: Loctite

Only problem with Anti-Seize is that you need to make sure that you do not use a copper based product, as the introduction of copper into the marine environment leads to rapid and destructive corrosion of the "marinized" aluminum castings used in most PWC's.

"Marinized" aluminum is an alloy that does not have copper in it, and it would be counter productive to introduce a compound that contains copper.

As a side note, you need to read the ingredients list for the Anti-Seize that you are using to make sure there is no copper present, You can not tell this by the color of the compound, there are several silver and/or grey colored compounds that have a high percentage of copper!

Threadlockers can also do an excellent job sealing the fasteners away from corrosive environments, because they fill up the gaps between the mating threads, and then they cure or harden, sealing out any possible entrance for moisture and/or corrosion

[ncdoo]

Re: Loctite

Anywhere you have dissimilar metals, ie steel to alum, antisieze works great to prevent corrosion. I like to use it on the spark plug threads where you have steel plugsand an alum head. It also works great on stainless fasteners, they are prone to galling. I also use them on the non threaded portion of bolts thatgo through alum like the bolts that hold the exhaust mainifold on a seadoo 787 and other models. Be careful, its like blueing dye, a little goes a long way. I wasnt aware of the cooper issue.