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Strength-Speed t1_iwgp260 wrote

Just a question if anyone knows. The cycle is intake, compression, ignition, exhaust. That would seem to indicate the piston starts in the up position then draws in air-fuel as the first step. But what draws the initial piston down, before the engine starts, as no ignitions have happened yet?

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Brandon432 t1_iwgpf51 wrote

Starter motor aka cranking motor. That’s the sound you here when you cold start a car. The pistons rotating without igniton.

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