Excessive water leaking out of my reservoir tank for my coolant

What is your question?

The incident occurs when I m idoling at a stop sign or at a light. Also happens when I'm driving, highway or city or doesn't matter. You can hear the bubbling of water and then the smoke from the leaking coolant all over the engine.

What makes this problem better or worse?

It seems to get better when the van gets turned off.

How long has your 2005 Honda Odyssey had this problem?

10 months