Hi Temp Antisieze ?

[ToyMaker]

I was looking through a jet engine overhaul manual recently and ran across this strange (to me) procedure.
When replacing the main burner and afterburner igniter plugs they say to coat the threads with milk of magnesia !
Anybody have any clue as to what purpose this serves?
I thought it was as antisieze but in other procedures in the same area they specify an antisieze compound. So, I'm confused (again).

robotic regards,

Tom

[Ken_Shea]

Maybe because it will dry powdery thus reducing or eliminating Galling?

[c131fr]

Originally posted by ToyMaker I was looking through a jet engine overhaul manual recently and ran across this strange (to me) procedure. When replacing the main burner and afterburner igniter plugs they say to coat the threads with milk of magnesia ! Anybody have any clue as to what purpose this serves? I thought it was as antisieze but in other procedures in the same area they specify an antisieze compound. So, I'm confused (again). robotic regards, Tom

I work on large, powerful GE turbines every day. Yes, it is an anitseize trick. Milk of Magnesia dries to a fine powder. This powder will not deteriorate with heat. Normal antiseize will deteriorate and dissapear with time during extreme heat cycles. M.O.M. will leave an even coat that works like nothing else.

Dave

[ESjaavik]

Does it work well on bolts/nuts in car turbo manifold systems?
And where do you get it (manufacturer)?
I don't think we have any magnesia cows around here. ;-)

[c131fr]

Don't know. I've only used in on HPT assemblies (high pressure turbine). Sorry buddy.

[ToyMaker]

Thanks C131fr
That cleared the murk a lot.

ESjaavik wrote:
>And where do you get it (manufacturer)?

MoM (milk of magnesia) is a remedy for acid stomach and diarrhea. Buy it at your local drug store (chemist-, apothecary-shop?).
Philips is a popular brand in the US.

robotic regards,

Tom
= = = = =
It is good to have an end to journey toward; but it is the journey that matters, in the end.
- - Ursula K. LeGuin

edit:
oops! It's NOT for diarrhea, it's a laxative.
Seems I suffered a little mental constipation when I wrote that

[trent2530]

You know that stuff that weightlifters put on their hands to get a better grip? Its milk of magnesia in block form.