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Supreme Being
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| Frank,
By "it", do you mean alum. paint?
I thought exhaust bolts were likely where anti-seize is most useful (aside from stainless), as it was once essential in order to remove the baffle discs in SuperTrap motorcycle mufflers.
As it is, I have to use locking header bolts just to keep my manifolds from loosening.
6 VOLTS/POS. GRD. NW INDIANA |
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| | | Supreme Being
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| | Dan, No, I meant the "Never Seize" I think it's intended function was to keep steel fastners from oxidizing Aluminum. I have never used the paint on threads, But I have on gaskets. Actually I have used it on Copper head gaskets on two stroke Motorcycles with pretty decent success.
Frank/RebopBristol, In ( by Elkhart) 
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| | | Supreme Being
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| | Ted, if I read your post correctly you say not to use ant-sieze if one of the two metals is aluminum and the other is iron or steel. What about spark plugs in an aluminum cylinder head? I have always used anti sieze on spark plugs. Is that a bad idea? Pete |
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| Pete 55Tbird (7/4/2008)
Ted, if I read your post correctly you say not to use ant-sieze if one of the two metals is aluminum and the other is iron or steel. What about spark plugs in an aluminum cylinder head? I have always used anti sieze on spark plugs. Is that a bad idea? PetePete. I’m referring to anti-seize that has aluminum in it. Definitely use anti-seize on the spark plug threads when installing them in aluminum heads but use an anti-seize that has the copper in it and not the aluminum. The anti-seize being used must have a dissimilar compound to what is being fastened. If one or both of the fasteners or contacting surfaces is aluminum, then don’t use an aluminum based anti-seize. I’ve have several different anti-seize compounds laying loose and they are all similar in color so it can be misleading without looking at the composition in detail to know exactly which is which.
  Lorena, Texas (South of Waco)
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| | | Supreme Being
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| | Pete, You could be starting an interesting discussion with that one! Most of the time the threads in an aluminum cylinder head are "Threadserts" which are steel threads installed into the aluminum head. The major diameter is intended to thread in once, while the minor diameter becomes the thread for the plug. Not always used, but often. So now the plug is steel to steel, in that case. However ( !) I don't like to use the stuff in a situation where it's exposed to a lot of heat, the carrier bakes out, leaving a hard carbon residue that's hard on threads, sockets and old muscles. It also adds an insulator between the plug and the head which could make the plug a "hot spot", causing pre-ignition. Others will swear it's the only way to put a plug in an aluminum head. After 40 plus years of having to pull aluminum cylinder heads from Motorcyles to install new threadserts, I don't like it in that situation. I do like the stuff on side cover, rocker covers or any application where there's not a lot of heat, but exposure to rain or the elements is possible
Frank/RebopBristol, In ( by Elkhart)
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| | I'm a retired machinist from a large kindustrial machine shop. We always used lots of anti-sieze on everything that was iron or steel in areas where heat was an issue. HOWEVER, for aluminum the anti-sieze compound MUST be compatable for aluminum. The can will say if it is. The wrong kind will actually soften the aluminum and the threads will pull. I've seen the threaded holes so soft from the wrong compound the bolts will pull out - threads and all. Where the dizzy goes, the right product must be used, because the dizzy's alloy is fairly soft and it will break if hammered on. The wrong compound could cause the dizzy to actually swell and be nearly impossible to remove with out breaking. Hope it isn't a tack drive unit on a T-Bird! Good luck. J |
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Supreme Being
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| My tube of Permatex Anti-seize has no label list of ingredients, or warnings/recommendations re: type of metals to use it on!
6 VOLTS/POS. GRD. NW INDIANA |
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| DANIEL TINDER (7/4/2008)
My tube of Permatex Anti-seize has no label list of ingredients, or warnings/recommendations. re: type of metals to use it on!If you have the part number of the antiseize, you can get a feel for the composition through the appropriate MSDS sheet. Here’s a link to the Permatex MSDS sheets. http://hazard.com/msds/mf/perm/list.html
Lorena, Texas (South of Waco)
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