* Timing Basics: Engine timing refers to the precise sequence in which the pistons move up and down and the valves open and close. This timing is crucial for the combustion process, which creates power.
* 180 Degrees Out: If the timing is 180 degrees out, the spark plug fires when the piston is at the top of its stroke (top dead center, TDC), but the intake valve is open, and the exhaust valve is closed. This means:
* The spark ignites the fuel-air mixture when it's not compressed, so the combustion won't be efficient.
* The exhaust gases have no way to escape, leading to a build-up of pressure and potential damage.
* Result: The engine won't start because it's essentially trying to run backward. The combustion cycle won't be completed, and the engine won't generate power.
What Happens When Timing is Off:
* Backfiring: You might hear backfires through the intake or exhaust.
* Rough Running: The engine might run very poorly if the timing is slightly off.
* Damage: Severe timing issues can damage the engine by causing detonation, overheating, and even bending valves.
Important: If you suspect timing issues, it's crucial to have a mechanic diagnose and repair the problem to avoid serious engine damage.
