The ARP bolt catalog has good explainations of the hows and whys of torquing
bolts and fastners so that they don't fail. So does Carroll Smith in his
books Tune to Win and Prepare to Win. Read them! and finish !
Greg Solow
----- Original Message -----
From: <WEmery7451@aol.com>
To: <fot@autox.team.net>
Sent: Thursday, April 27, 2000 10:10 AM
Subject: Torqueing Questions
> Dear Foters,
>
> Now that my aluminum front hubs have laid around in my garage for about
seven
> years, I am finally in the process of installing them. I always become
> nervous while torquing bolts into aluminum -- I have already stripped some
> threads in my aluminum flywheel.
>
> In the first place, I cannot find any recommended torque values in my
grease
> laden red 1959 TR-2 manual with TR-3 Supplement, or my 1965 TR-4 manual
for
> these specific bolts. These bolts have two lines crossing each other on
the
> heads -- I assume grade-6? Any recommendations?
>
> General torque questions on engine building: There are all sorts of
different
> methods of torquing where the bolts will end up with different levels of
> tightness for the same numerical ft-lb readings. Torquing stainless steel
> bolts in nuclear plants involves exotic procedures and wormy long
equations.
>
> It apparently makes a big difference by installing bolts dry, lubricating
the
> threads, lubricating both the threads and under the bolt heads, or using
more
> slippery synthetic lubricants or greases. If you use slippery lubricants
on
> bolts going into aluminum, they want to keep turning without reaching the
> rated torque values until the threads come out.
>
> For years, I have built engines using loctite on rod bolts and main
bearing
> cap bolts. My machinist, who builds stock car engines, says that I
shouldn't
> use loctite since I may get improper torque readings. He just puts a
little
> mineral engine oil on the threads (not under the bolt heads) and torque's
to
> the recommended values.
>
> Any ideas, recommendations, or related theories with engine bolt torque
> procedures will be appreciated.
> Thanks. Bill Emery
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