[Vwdiesel] Turbo dreams

LBaird119 at aol.com LBaird119 at aol.com
Mon Jun 21 12:15:49 EDT 2004

> My understanding of sodium-filled valves is that the sodium melts at a low 
> temperature.  The liquid flows around inside valves transferring more heat 
> to 
> surrounding parts of engine (guides, lifters, etc...), rather than just to 
> the 
> seats.
> I know a machinist who doesn't like them, says that they are weaker due to 
> being hollw.  Any additional thoughts?

  When I did my 914 heads the machinist told me the first thing to do 
was throw away the exhaust valves.  I informed him of just how much 
those things cost!!  They were something like $35 each 25 years ago, 
my cost!  He said "Huh?"  Then I reminded him they were sodium filled, 
he was thinking air cooled VW.  He said they were fine in that case, just 
grind them.  He didn't realize they were sodium filled.
  The VW TD valves are NOT sodium filled.

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