I always use oil when chasing threads.  You can get special
thread-cutting oil but it's probably not necessary just to chase
existing threads.

Allan
--
1991 Vanagon GL

"Giasson, Pascal (DNR/MRN)" <Pascal.Giasson@GNB.CA> said:
> It is widely recommended to clean up the threads on the head studs
> before putting the heads and cap nuts back on.  So I am trying to do
> that with my 10x1.5 die and it seems to go on very hard.  Thinking that
> I must had a bad die, I borrow a friends die and it goes on slightly
> better but it still seems to be quite tight and does not seem normal to
> me.  Is this normal for these studs?  Should I just lube them up and
> chase them with the die?  Thanks
>
> Pascal
>
> '84 Westy
>
>
>