Warning for listers planning turbo rebuild

[james accordino]

--- Konstantine Bogach <kbogach at home.com> wrote:
> Apparently, a paper from Turbo City with schema and
> spec for K-26 has a
> mistake. I just snapped (damn!!!!!!!!!!!)  turbo
> shaft trying to torque
> compressor nut to specified in the paper 15 lb/ft.
> I called another
> turbo place and they told me that the spec is 105
> lb/in which about 9
> lb/ft.

That sucks!

> Lacking experience to feel the needed torque by hand
> I am scared to
> death to torque exhaust manifold nuts. Some of them
> spin too much.  The
> spec from Bentley is 30 n/m. Is it right?  What does
> "pulled stud"
> mean?  A stud is forced out stripping thread on the
> way?  What is the
> fix?  Drill for larger thread?

I had at least a dozen broken or stripped out on the 2
heads I've done.  I used a thread insert called
Helicoil.  I think next time I'll just have all the EM
stud holes Helicoiled.  I also had a problem with the
studs winding out, even with brand new correct nuts
and washers.  I locktited all the studs in place, let
them cure and have had no problems since.

Jim Accordino

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