[DeTomaso] AN fittings and Teflon tape

[pantdino at aol.com]

Just a theoretical question--

I thought the reason you have to decrease the torque you put on a bolt / nut if you apply antiseize or oil is that by making the threads slippery you make it easier to apply too much torque, which strips the threads. Not so?

How is teflon tape different?

Jim Oddie







-----Original Message-----
From: JDeRyke at aol.com
To: bjbstewart at yahoo.com
Cc: detomaso at realbig.com
Sent: Fri, May 7, 2010 8:03 pm
Subject: Re: [DeTomaso] AN fittings and Teflon tape


In a message dated 5/7/10 7:18:32 PM, bjbstewart at yahoo.com writes:
> Should I use it? Methinks yes but thought i'd check.
 
robably not; depends on the situation. AN fittings seal from a close match 
f the 37 degree flanges, not by the threads, so you get no extra sealing 
rom teflon tape on threads. Steel brake, clutch and   gas lines also seal 
rom the flanges, not from the threads. 
ut an old racer showed me that if you got a slight leak with flaired 
ittings, by teflon-taping the threads, one could TIGHTEN THEM TIGHTER WITHOUT 
TRIPPING, thus often curing the leak. It has nothing to do with sealing the 
hreads- teflon is reaaly slippery. I've done this to Holley carburetors; by 
eally leaning on a wrench, its possible to strip out the fuel inlet nuts, 
hus junking the carb body. Teflon tape on the fuel inlet nut threads always 
llows me to get them leak-free. Good luck- J DeRyke
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