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Hot Rods SBC Valve Seals

Discussion in 'The Hokey Ass Message Board' started by Pat Thompson, Mar 9, 2016.

  1. Pat Thompson
    Joined: Apr 29, 2012
    Posts: 196

    Pat Thompson
    Member

    When replacing the valve seal in a SBC, is it better to use teflon or rubber umbrella seals??
     
  2. Hollywood-East
    Joined: Mar 13, 2008
    Posts: 1,205

    Hollywood-East
    Member

    Chevy has been using o-rings for decades... An some will say Teflon doesn't allow enough oil to the guide... Simple is what simple does... They work, I still build my Blower engines with o-rings..
     
    gas pumper likes this.
  3. I like Teflon, more spring and collar clearance, last longer and they gave me 1200-1300 miles to a qt. of oil. Of course, the guides must be cut to fit.

    Had nothing but trouble with umbrellas. Only got 500-600 miles to a qt.
     
  4. aaggie
    Joined: Nov 21, 2009
    Posts: 2,531

    aaggie
    ALLIANCE MEMBER

    I started using the Teflon type seals in 1966 and have never had a valve seize in the guide as some say will happen. The stock umbrella and "O" ring will work too but they do get brittle and break from heat and age. Be very careful putting the "O" ring in place it is easy to cut it when you release the compressed spring.
     
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  5. Pat Thompson
    Joined: Apr 29, 2012
    Posts: 196

    Pat Thompson
    Member

    Thanks for your replys.
     

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