(no subject)

[Ken Keith]

Maybe the bolt is too long (wrong one?) and it is bottoming out in the hole, then when you keep turning it it becomes like a drill?  The same problem would repeat after helicoiling.

It doesn't solve your problem on what to do, but it might be part of the cause?

Just a thought.

Ken


Konstantin Bogach
    konstantin.bogach at morganstanley.com

Good people, My first experience with hilicoils turns to be not good.  I restored 6mm
thread in aluminum (oil filter bracket, turbo oil supply flange), tried
to torque the bolt and... bolt is eaten, thread in aluminum is eaten by
helicoil.  I broke tang with hammer and rod. Visually was clear, bolt
easily went in through helicoil all the way when I tried it.  Until I
have a clue what happened I don't use helicol in aluminum any more.
A problem grew into bigger problem.  Now I have bigger hole which might
be OK for 8mm thread. Upper part of the hole is bigger then should be
for 8mm tap (7.5 mm) but lower part (bigger than half)  is good. But I
can not find stepped studs.  Dealer does not have it (at least one guy
from parts told me that). Stores I called don't have them.  Any advice
how to fix it or where to get 8 mm to 6mm studs? I appreciate your help. Konstantin Bogach.