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Thread: how to identify sodium filled valves

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  1. #1
    Join Date
    Feb 2010
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    Bowling green KY
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    54

    how to identify sodium filled valves

    Just as the title, how do you know a sodium filled set from standard valves? I have searched but not came up with any results.
    04 rcsb with a few additions.

  2. #2
    Join Date
    Mar 2009
    Location
    Tyler, TX
    Posts
    871
    measure the overall length, thats the only way i know of, the hollow stem valves should be .6mm shorter than standard valves, because the ls6 went through some valvetrain changes in 02 and that was one of them
    [IMG]https://images.app.goo.gl/XLfskemekXBo5VfS7/IMG]
    www.tjc.edu

  3. #3
    Join Date
    Jul 2008
    Posts
    329
    Quote Originally Posted by molitor View Post
    . . . the hollow stem valves should be .6mm shorter than standard valves . . .
    You have this backwards - the LS6 valves are longer.
    The longer valves were needed to compensate for the smaller base-circle diameter on the high-lift LS6 cam lobes.

  4. #4
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
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    6,994
    Weigh them
    2006 Silverado
    Little Black Bitch

  5. #5
    Join Date
    Sep 2009
    Location
    San Diego
    Posts
    12
    The length of the valve will not tell you much other than whether the valves were used with a higher lift cam (ala LS6)...as sleeper has said, the true test is weight. I forget the actual numbers but I beleive that the standard valves weigh around 90 grams and the filled/hollow weigh closer to 60.

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