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Head bolt size and thread pitch?

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    Head bolt size and thread pitch?

    I am replacing the headgasket on an m20b25 and I want to buy a tap to chase the threads but I can't find the specs on the bolts--can someone who has done this work point me to the right tap to buy?
    '90 zinno 325iS

    #2
    That would be an M10x1.5 which happens to be the same as for the lollipops. There is a particular tap for chasing which I presume has a flat bottom for blind holes and Granger has them for about $5
    Seat Shocks....I have passed the baton to John Christy from Ninestitch. Email John or Garrett at ninestitch1@gmail.com

    https://www.r3vlimited.com/board/sho...86#post4944786
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    http://www.r3vlimited.com/board/showthread.php?t=360504
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      #3
      Thank you! Sorry for the late reply, I was away for a bit.
      '90 zinno 325iS

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