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High-Temperature Exhaust Stud/Nut Anti-Seize Lube?

F

FBH44

Well-known Member
I struggled to remove exhaust manifold, am reinstalling exhaust on unit, need to know if there is such a thing as high-temp anti-seize lube for exhaust applications?
 
I believe your looking for the copper anti-seize. I also believe you leave the bottom 3 or 4 threads dry and lube the rest of it, then screw it in. Problem being that the bolts freeze at the top, not the bottom.
 
this is the stuff i use. says good for 1800 degree's f. use it on head bolt studs and nuts and pretty well on any bolt thread , antifreeze fittings and on the temp gauge going into the heads. lawn mower blade bolts , wheel studs on my tractors. sure is a life saver.
cvphoto53037.jpg
 
Most anti-seize compounds are notoriously messy, migrating from hands and tools to what seems like everything within 100 yards. A much cleaner alternative that's worth considering is a suspension of magnesium hydroxide in water (aka Milk of Magnesia), which is commonly used on turbine igniters and aircraft engine spark plugs to keep them from seemingly welding themselves in place.

I learned about using Milk of Magnesia as a high-temperature anti-seize almost fifty years ago, from ex-military aircraft engine mechanics. They argued among themselves if it should be brushed onto the male screwthread and assembled wet, or brushed both onto the male and into the female thread and allowed to dry before assembly. I suspect dry assembly is wiser if there is any chance of moisture being trapped, but if the moisture can escape from the assembled joint, wet assembly is probably faster.

Wet Milk of Magnesia can be a bit messy, but once dried the residue can almost always be brushed to rinsed away easily.

One last thing . . . use PLAIN Milk of Magnesia, not the flavored stuff.
 
G.M. used brass nuts on the exhaust pipe studs in the 1960's. they were twice as long as a regular nut. after that i have not seen brass nuts . thats why i was asking whats this on as yes brass nuts do work. i have heard people say when its -40 its enough to freeze the brass balls off a monkey.
 
(quoted from post at 17:20:43 08/12/20) G.M. used brass nuts on the exhaust pipe studs in the 1960's. they were twice as long as a regular nut. after that i have not seen brass nuts . thats why i was asking whats this on as yes brass nuts do work. i have heard people say when its -40 its enough to freeze the brass balls off a monkey.
Click to expand...

The saying goes more like: "freeze the balls off a brass monkey". The balls being iron cannon balls and the monkey being a plate with dimples in it to hold the cannon balls. The plate allowed the cannon balls to be stacked in a pyramid shaped pile. Most monkeys were made of iron however, some fancy ships used brass plates. Supposely in very cold weather the pile of canon balls would fall apart when stacked on a brass monkey - the cold weather froze the balls off the brass monkey.

Sorry to correct you but, I just could let it pass.
 
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