Hilicoil ate aluminum thread! Need help.

[Craig Lebakken]

Konstantin,

I was inquiring from the list what thread locker might be
available. I do not know. I will ask my friend tomorrow if
he knows of something. I think you will be happy with the
Timeserts. Helicoils are wire, whereas the Timeserts are a
complete replacement of the damaged threads.

If I was in your shoes, I would use a hi-temp Loctite thread
locker just for peace of mind.

Good luck.

Craig

----- Original Message -----
From: "Konstantine Bogach" <kbogach at home.com>
To: <lebakken at cdicadwa.com>
Cc: <quattro at audifans.com>
Sent: Sunday, January 13, 2002 4:19 PM
Subject: Re: Hilicoil ate aluminum thread! Need help.


> Graig,
>
> could you clarify what thread locker you meant?  I am
going to order timeserts for M6 and M8 next week just to
have in handy.
> I pulled a oil filter bracket at local junk yard to have
spare in case stepped stud fails (the hole is too large for
6mm timesert after helicoil stripped the thread).
>
> Thanks.
> Konstantin Bogach.
>
> >
> >
> >
> > From: "Craig Lebakken" <lebakken at cdicadwa.com>
>
> >
> > The specifications/formulas for the thread depth
requirement
> > for bolts threaded into metals of different properties,
> > typically a steel (stronger) material threaded into a
weaker
> > material (aluminum), in order to exceed the maximum
strength
> > of the stronger material, have been published in the
> > Machinery's Handbook for years. We (at my engineering
> > office) deal with this problem often. I can guarantee
that
> > Audi did not supply enough material to fail an EM bolt.
> > Torque values are therefore very important. Does anyone
have
> > a threadlocker for this? One that will maintain the
original
> > torque value, but not make you pay later?
> >
> > In another experience - Porsche 944T cyl heads are
notorious
> > for failing at the head/block threads. My neighbor used
> > Timeserts in the block to renew three head bolt threads.
> > This 944T was then shipped to Europe, where it ran
> > Silverstone, Hockenheim, etc. He said that Timeserts are
the
> > cat's meow. Since his car has run several F class SCCA
> > events since, I would have to agree.
> >
> > FWIW
> >
> > Craig Lebakken
> > 1986 4KQ
> >
>