The REAL 4-stroke cycle explained scientifically! 🔬
Most videos show oil dripping - that's WRONG! In a real DOHC engine, there's only a thin oil film on honed cylinder walls.
Correct sequence:
1. INTAKE: Piston down, intake valve opens, fuel mist injected
2. COMPRESSION: Piston up, both valves closed
3. POWER: Spark + Explosion pushes piston down
4. EXHAUST: Exhaust valve opens, gases out
This is how your car actually works!
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