In article >,
Jim > wrote:
>These engines are made from an aluminum alloy that has copious quantities of
>a very hard material (forget which one). Anyway, a very thin layer of hard
>material forms the wear surface. Go through that, and you are left with
>aluminum which is a very very very poor choice for wear.

Silicon. It's the "sil" in nika/aluma-sil.


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