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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
What about past issues? Year truck? Size motor? Age? Mileage? Maintenance schedule? Have you checked for any leaks?
IKR. Looking in his post history, it is a 2003 4.7 liter. My guess is head gasket. Any water/steam from exhaust? Water in oil? For future reference, we need more to work with then just a problem. More help can be sent your way if we know motor, year of truck etc.