Very common automotive blog material as to whether torque is affected by
anti-sieze. Shows up on every car list I am on. I have seen engineering
papers written on it. I personally, also being an engineer, subscribe to the
side that torque is a static measure while the lubricants tend to more
affect friction in movement. There is very little movement at the end of the
torqueing of a bolt and I find it hard to believe the antisieze would affect
the value to any great degree. Since my Harley recommends antisieze on the
plugs, and are very careful about torques for everything on the engine, I
stick with the "no real affect on torque value" position.
Curt
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of genepadgett@comcast.net
Sent: Wednesday, April 18, 2012 6:14 PM
To: rfraser@bluefrog.com
Cc: Tiger's Den
Subject: Re: [Tigers] Anti-Seize on Spark Plugs
Just a caution to all about specific torque figures. The 15 - 20 ft- lb
figure in the shop manual is probably a dry torque figure. Anti-sieze on the
threads acts as a lubricant. It will result in a considerably tighter actual
clamping force (and stress on the plug threads) at a 15-20 ft-lb torque
reading than you would have at the same torque and no anti-sieze .
Gene
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