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2006-08-19 06:14:13 · 2 answers · asked by Anonymous in Science & Mathematics Engineering

2 answers

Crankcases are typically made of steel, aluminum, or cast iron. Many crankcases are simply machined to yield a cylinder, i.e., a chamber in which the piston moves up and down.

Some crankcases have separate cylinder liners that the piston slides up and down in. These are usually cast iron.

Pistons are usually made o aluminum alloy to make them lightweight, but the rings that seal the piston to the cylinder walls (piston rings) are hardened steel. These need lubrication, so the cylinder wall is lubricated from below and through oil channels in the piston.

Hope this answers your question. It wasn't worded too well.

2006-08-19 06:39:15 · answer #1 · answered by Favoured 5 · 0 0

I takes more than a few words with a question mark at the end to make a question.

Try again.


Doug

2006-08-19 13:25:46 · answer #2 · answered by doug_donaghue 7 · 0 0

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