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Thread: measuring pin to crown height

  1. #1
    Senior ****** Carport Converter Sam_Q's Avatar
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    Default measuring pin to crown height

    I have been quoted a pin to crown height for some ACL pistons and I am trying to work out where these will end up sitting in the block, how is this measured exactly?

  2. #2
    Toymods Tuner Backyard Mechanic Forcefed6's Avatar
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    Default Re: measuring pin to crown height

    Pin height is measured for the centre of the gudgeon pin to the top of the ring land.
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    Senior ****** Carport Converter Sam_Q's Avatar
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    Default Re: measuring pin to crown height

    and the ring land is the line that sits ontop of the top most compression ring?

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    Toymods Tuner Backyard Mechanic Forcefed6's Avatar
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    Default Re: measuring pin to crown height

    Would be the uppermost part of the piston on the outer edge (above the top ring). This counts for dished and Hicomp pistons where the centre protrudes into the combustion chamber in the head.
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  5. #5
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    Default Re: measuring pin to crown height

    Quote Originally Posted by Sam_Q
    I have been quoted a pin to crown height for some ACL pistons and I am trying to work out where these will end up sitting in the block, how is this measured exactly?
    What was the height you were told out of intrest?

    Does anyone have a list of wjt the common toyota measurements are?
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  6. #6
    Senior ****** Carport Converter Sam_Q's Avatar
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    Default Re: measuring pin to crown height

    i will check what it was I wrote it down somewhere

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