Valve guides too long? | FerrariChat

Valve guides too long?

Discussion in '365 GT4 2+2/400/412' started by markcF355, Oct 15, 2007.

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  1. markcF355

    markcF355 F1 Rookie
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    #1 markcF355, Oct 15, 2007
    Last edited by a moderator: Sep 7, 2017
    On my 85' 400i the part of the valve guide where the seal seats is around .7mm too long. When I install the seal, as soon as it seats, it rips off the top half of the seal!
    Whats the story?
    Am I doing something wrong or do I have the wrong guides?
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  2. 2NA

    2NA F1 World Champ
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    #2 2NA, Oct 15, 2007
    It could be the seal.

    Some "OEM" valve seals are ****.
     
  3. markcF355

    markcF355 F1 Rookie
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    #3 markcF355, Oct 17, 2007
    I've been told that I don't need to seat the seal. Just tap it down until it feels snug.
    I don't understand why they would put a shoulder on the guide if the seal never touches it.
     

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