Metric Bolt Strength

[Jörgen Karlsson]

Hi,

Replacing 12.9 strength bolts with 8.8 is a very bad idea, 12.9 quality
bolts does not need to be replaced unless they are damaged. But I can't see
Audi fitting 12.9quality bolts anywhere in the car, if it is a stock bolt it
should be replaced. Even if it is marked 12.9, I am sure that Audi has
managed to fuck it up in one way or an other.

Jörgen


> Does anyone know if it's essential to re-mount the flywheel on my 84 ksq
with
> new 10mm 12.9 bolts as opposed to the 8.8's I just came home with.
According
> to http://euler9.tripod.com/bolt-database/bolt-database10.html there's an
> enormous difference in parameters between the two grades. All I want to do
is
> replace this ##$$@@@! clutch before the snow flys. TIA