rebulding head: do I need to replace springs?

[james accordino]

--- JanDebL at aol.com wrote:
 Even some of the aftermarket high
> performance cam
> manufacturers had quality control issues and sold a
> shim pack which you added
> shims under the spring to meet the tension spec.  I

BTDT, many times.  And if one of the multi-pack
springs failed the entire unit failed almost
instantly.

> suspect the Germans make
> decent springs but if the engine has been run
> excessively hot to the point
> where the temper in the springs were effected, there
> may be a need for some
> concern.

AFAIK, it's accepted that Germans make the best
springs and wire.  High quality steel alloys, and
strict QC.  One of the specialties of the Ruhr valley.
 Wire drawing and spring factories are everywhere.
Don't know if this is true, but some of my friends
told me some Nascar teams were using German valve
springs?  Maybe some with higher winding engines
without the valve failures?  I'd be interested to see
how an old set(250k+ miles) of springs tests.

My. $.02
Jim Accordino

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