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Technical Cylinder wall thickness

Discussion in 'The Hokey Ass Message Board' started by ekimneirbo, Sep 5, 2020.

  1. ekimneirbo
    Joined: Apr 29, 2017
    Posts: 1,459

    from Brooks Ky

    How are you checking the wall thickness in your engine before boring........
  2. birdman1
    Joined: Dec 6, 2012
    Posts: 994


    Take out the frost plugs. So you can see the cylinder walls. Then keep trying until you find the largest diameter drill bit that will fit between the cylinder walls. Subtract that from the cylinder spacing, and you have the thickness available.
    ekimneirbo likes this.
  3. AngleDrive
    Joined: Mar 9, 2006
    Posts: 826

    from Florida

  4. Ericnova72
    Joined: May 1, 2007
    Posts: 429


    Any shade tree method is just a guess, since wall thickness is never uniform around the entire cylinder.

    A sonic test, or a big bucks x-ray is the only true methods with any real accuracy.
    Anything you can do with a naked eye is just a very, very rough estimate to eliminate obviously poorly cast blocks with major core shift.
    ekimneirbo likes this.

  5. Ultrasonics.....compression wave only for wall thickness. Shear wave will show imperfections in the walls.
    ekimneirbo likes this.
  6. Mike VV
    Joined: Sep 28, 2010
    Posts: 2,064

    Mike VV
    from SoCal

    I bought one of these years (Dakota Ultrasonics) ago for porting cylinder heads. Not exactly cheap, but it saved me countless times from making the walls too thin.
    Also let me know when a wall was "thicker"...than I thought..!
    I bought one small radius probe for porting and a larger radius probe for cylinder measuring.
    Very accurate, comes with a check tool for verifying accurateness before doing the actual measurement.
    Can be adjusted for both ferrous and nonferrous materials (steels, iron, aluminums, magnesium, etc.)

    rmcroadster and ekimneirbo like this.

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