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Group: Administrators
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Here is a link to a past thread regarding the ‘steam’ holes. In most instances, I prefer to plug them on the blocks that do have them. http://forums.y-blocksforever.com/Topic80673.aspx
  Lorena, Texas (South of Waco)
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Group: Forum Members
Last Active: 2 Weeks Ago
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Marked in red. I seem to remember these holes are into the water jackets block and head are helpful. But I don't know why Also if you look below the lower steam hole you see two more holes off to the side of the head stud. Wonder what that is for.
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