Small Engines (Lawn Mowers, etc.): rotatiller, honda engine, intake valves

Question
QUESTION: what can make intake valves break or come out trough a different hole and get stuck? what step would be needed to replace it back? problem is on my gc160la-mha2 honda engine.

ANSWER: Did the timing belt break and cause the piston to contact the intake valve?  Have you removed the head to see if the piston is dented on top?

Eric

---------- FOLLOW-UP ----------

QUESTION: the timing belt is ok.do u still think the piston might be dented on top? i still want to know what causes the intake valves to bend break or break trough a different direction.

Answer
I have seen engines over speed cause issues but usually the cam breaks which in term causes valve damage.  If the timing belt "jumps" a few teeth then it can cause the piston to hit the valves.

My guess is the piston or timing belt caused the damage.  Are you trying to rebuild the engine?

Eric