Mechanic Question

[TozeKituki]

Hey I have a question for you.

When we are going to do something to the engine head we always align the Top Dead Center ( TDC ).

Why do we do that ? And what happens if we don´t do that ?

 

[jimmyde78]

Its the timing of the engine. It's when the piston is at top dead center. If its off; the engine won't fire at the right time; thus it won't run....You should look up how an engine works. (not being a dick; not everyone knows) Lots of cool videos on youtube.

 

[Warrior1996]

When the engine is at top dead center, both valves are closed and the camshaft does not have any sprung force on it from the valve springs. Also, the camshaft can only be removed in that position (both cam lobes facing downward).

 

[jimmyde78]

That's a much better explanation Trent.

 

[Warrior1996]

Sounded like you needed a little help Jimmy... lol jk, just figured I'd add my 2 cents