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Thread: Soft Aluminium Alloy

  1. #1
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    Soft Aluminium Alloy

    How is an aluminium alloy cylinder head accurately tested for softness without making it useless ?
    PLR or peter r elsewhere

  2. #2
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    Soft Aluminium Alloy

    They use a tester that is basically bouncing a ball bearing on the surface. The harder the material the higher it bounces. Probably has a proper name but I'm not sure what it is.

    Steve
    1985 County - Isuzu 4bd1 with T25G turbo, LT95, 255/85-16 KM2's
    1988 120 with rust and potential
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  3. #3
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    Leeb rebound hardness.
    -Mitch
    'El Burro' 2012 Defender 90.

  4. #4
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    Leebs still marks/indents the surface maybe not as much as the other indent types though .
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  5. #5
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    Quote Originally Posted by steveG View Post
    They use a tester that is basically bouncing a ball bearing on the surface. The harder the material the higher it bounces. Probably has a proper name but I'm not sure what it is.

    Steve
    Thanks , i`ll see what the net can tell me about rebound or ball rebound but i guess they still mark the surface .

    I read of head surfaces been tested but never a mention of where the bolts mate .

    Seems the destructive types are accurate but not much help if you still what to use the piece .
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  6. #6
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    Its a small ball bearing, generally if you are having a head tested you will get it skimmed after is passes or bin if it doesn't.
    When i had my tdi head done last year you couldn't see or feel where the tester was used.
    MY08 TDV6 SE D3
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    5.... 4.... 3.... 2.... 1....

  8. #8
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    Quote Originally Posted by Tombie View Post

    Still Leeb though so marks the surface , from searching diamond tipped how ever they read .

    That`s a good link , it says they only test in 3 places .
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  9. #9
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    Quote Originally Posted by loanrangie View Post
    Its a small ball bearing, generally if you are having a head tested you will get it skimmed after is passes or bin if it doesn't.
    When i had my tdi head done last year you couldn't see or feel where the tester was used.

    Did you see them test your head ?

    Do you know how many places they checked ?

    Did they give you a figure as to why or why not to use the head ( most likely converted to brinell scale ) or did they say it was good or not without explanation .
    PLR or peter r elsewhere

  10. #10
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    Quote Originally Posted by steveG View Post
    They use a tester that is basically bouncing a ball bearing on the surface. The harder the material the higher it bounces. Probably has a proper name but I'm not sure what it is.

    Steve

    SCLERSCOPE as far as i can find , predecessor of the LEEB
    PLR or peter r elsewhere

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