My understanding is that the sodium helps cool the valve, and hence it = lasts much longer than a regular valve.
 
Z
-----Original Message-----
From: Dave Baker [mailto:djbaker@SPRYNET.COM]
Sent: Tuesday, January 09, = 2001 8:33 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: = True cost of AMC heads for 1.9L and 2.1L: bare for $240 to = $216!

Sodium-filled valves.  There's a neat = concept.  Can anyone tell me why they would want to do this?
 
Dave in KC (who is learning tons of new stuff = from the members on this list!)
85 Westy
 
http:= //members.fortunecity.com/davebaker1/westy/westy.htm