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The 1972 Pontiac LeMans typically features a V8 engine, which operates on a four-stroke cycle: intake, compression, power, and exhaust. Air and fuel are drawn into the cylinders during the intake stroke, compressed by the pistons, and ignited by spark plugs, creating combustion that drives the pistons down. This linear motion is converted to rotational motion through the crankshaft, ultimately powering the vehicle. The exhaust gases are then expelled, completing the cycle.

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