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Valve adjustment screw DH engine

Discussion in 'T3 & T4 Tech Help Clinic' started by Kew, Sep 9, 2019.

  1. Kew

    Kew New Member

    Messages:
    20
    Location:
    Coffs Harbour
    Hi All,

    I need one of the above - anyone know if other VW engines have the same screw to help me in my hunt for one?

    I’m not sure of the screw size (9 0r 10mm?) but the locking nut takes a 15mm socket.

    Pic attached - any advise on what cause the screw fail?

    4ADE4FFE-402D-44B8-A727-40A08ADFC15D.jpeg

    Cheers,

    Kew
     
    Mr Beckstar likes this.
  2. Alpal

    Alpal Moderator Staff Member

    Messages:
    8,499
    Location:
    Melbourne Bend of Islands
    Tappet adjusters get thumped a lot! Work harden? Or hardened surface wears off? Either way I would look at replacing all adjusters with new screws and nuts. Not something you want to fail.
     
    Mr Beckstar likes this.
  3. cbus

    cbus Well-Known Member

    Messages:
    11,765
    Location:
    sunshine coast
    As Al said.
    Most are past replacement time but get ignored.
    Also a lot of the replacements are not sufficiently hardened.
    Some folks go a step further and fit lash caps.

    I'm sure there will be some recommendations for good screws ( worth changing nuts as well if showing signs of rounding) but I will dig up a link.
     
    Mr Beckstar likes this.
  4. Kew

    Kew New Member

    Messages:
    20
    Location:
    Coffs Harbour
    Thanks for the replies guys - I read an article yesterday on the topic that agrees with you cbus (new replacement screws failing):

    https://www.gowesty.com/tech-article-details.php?id=111

    I’ve heard of those caps being used - unfortunately that damaged screw hasn’t got the length anymore.
     
    Mr Beckstar likes this.
  5. cbus

    cbus Well-Known Member

    Messages:
    11,765
    Location:
    sunshine coast
    Yeah.
    Caps just protect the valve stems anyway.
    The screw pictured is certainly stuffed well past usual.
    Check nothing else mechanically out such as sticking valve.
    But my guess is just soft and not adjusted for ages. ??
     
    Mr Beckstar likes this.
  6. cbus

    cbus Well-Known Member

    Messages:
    11,765
    Location:
    sunshine coast
    Think Mick motors screws are meant to be ok.
    Have installed a couple of sets so will find out.
    Think they were about $5 EA.
    Other option for some labelled original type German sourced I think was a yank site.
    Naturally more expensive.
     
    Kew and Mr Beckstar like this.
  7. Kew

    Kew New Member

    Messages:
    20
    Location:
    Coffs Harbour
    Thanks cbus, I grabbed some screws from Mick motors so we'll see how they go..
     

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