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Re: 16v exhaust valves



    I believe the sodium melts, allowing it to "slosh" end to end inside the
valve for heat distribution/dissipation
    Gerry
----- Original Message -----
Subject: Re: 16v exhaust valves


> Doolbnroht@aol.com wrote:
>
> > but here is the question. tonight i read that the 16v exhaust valves are
sodium
> > filled and have special discarding instructions (don't belive me? read
it
> > yourself!).
> > but anyway i wanted a good explaniation as to why they are filled with
sodium.
> > hope you all can help me.
>
> The sodium filler is there to absorb heat. I don't know how explain this
on an
> engineering-level. Basically, though, it keeps the valve from warping from
the
> heat and reduces the engine's tendency to pre-detonate. I believe that the
> Corrado G60 is the only 8v motor with these valves. Anyone know if the TDI
cars
> have'm too?
> --
> Scott F. Williams



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