<VV> anti anti seize

[djtcz at comcast.net]

Hi Clark, 




I 'd bet a dollar menu cheeseburger the heat transfer is as good or maybe little better with antiseize or grease. I anticipate No problem with the electrical contact needed as a ground connection either. 


If I find a hot water pipe or pan on the stove and quickly grab and release and I'm quick there is very little discomfort. If I put some hand cream or a squirt of thick shampoo in my palms, and make a quick grab of the hot pipe..... ouch! 


there is mostly air in a threaded connection (unless Loctite is used). Even the faces on one flank of each of the threads that press together are only touching at some modest percentage. 
the heat transfer compound used on cpu processors and other electronic equipment works not because it conducts heat so well, but because it bridges a lot of the air gaps that exist even in a joint between machined surfaces, and the silicone compound is low volatility so lasts for decades. 


similarly there's plenty of debate about using "dielectric" grease on electrical connections. 
typical dielectric rating is for a thickness of the goop, like 1/8 inch or more. I believe the film strength is easily overcome by contact pressure even for sliding contacts. 
http://www.nyelubricants.com/_pdf/literature/Lube-Insights-Connector.pdf 


For decades battery posts and cable terminals have been coated with stuff like Lubriplate prior to assembly to reduce corrosion. 
When my dad questioned Augie about that in 1958 he said lubriplate is "conductive." I think Augie was wrong on the theory, but correct that t he high amp connection works just fine, and probably will last longer when protected from creeping corrosion.. 


Dan T 

============================ 
Date: Mon, 18 Mar 2013 07:54:37 -0400 
From: "Clark Hartzel" <chartzel at comcast.net> 
Subject: <VV> Anti seize on spark plugs 


Everyone is missing the real reason for not using anti seize. The plug 
transfers heat thru the threads to the cylinder head. that's why you have 
different heat ranges on spark plugs. The heat range is the ability to 
transfer heat from the red hot plug to the head which is cooled. You 
shouldn't use anti seize as it gums up the metal to metal contact. 
Clark Hartzel 



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