My van is over heating, what part do I need to replace? on 1994 Nissan Quest

When I'm driving, the gage stays at cold, goes slowly to "M",
stays there for a few minutes; than goes quickly higher. After that smoke comes out from under hood.

Asked by for the 1994 Nissan Quest
1 answer
Need to first determine WHY the van is over heating. Here is a check sheet to help you: