Hilicoil ate aluminum thread! Need help.

[Konstantine Bogach]

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
>