Hilicoil ate aluminum thread! Need help.

[Fred Munro]

Hi Konstantin;

The torque depends on the bolt class. The generic torque spec for a standard
class 4T 6mm bolt is 5 Nm. Even a class 7T  6mm bolt only takes 10.5 Nm
torque. A class 8T can take 29 Nm.

It sounds like you may have overtorqued the bolt and stripped the helicoil.
You may want to double-check your 25 Nm torque spec - I sold my beloved
Bentley manuals for your model Audi to Geo, so I can't check it out for you.
If it is 25 Nm, those are darn good 6mm Allen bolts!

Fred Munro
'94 S4

----- Original Message -----
From: "Konstantin Bogach" <konstantin.bogach at morganstanley.com>
To: "Jim Green" <jeg1976 at yahoo.com>
Cc: <quattro at audifans.com>
Sent: Thursday, January 10, 2002 12:41 PM
Subject: Re: Hilicoil ate aluminum thread! Need help.


> I'd like to make another attempt to repair the thread.  If failed I will
> have no other choice.  The problem that I can not find anywhere stepped
> studs or double threaded sleeves.
> By the way,  Bentley's torque spec for 6mm allen bolt holding turbo oil
> supply line is 25 nm.  It is right? No mistake there?
>
> Thanks.
> Konstantin Bogach.
>
> >
> >
> > You may be better off replacing the whole oil filter
> > bracket piece.  I bet you could get one for pretty
> > cheep form a pull n save lot, or a lister?
> >
> > =====
> > Jim Green
> > '89 90tq EFI
> > http://www.geocities.com/jeg1976/car_home.html
> >
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