Any 3.5l gurus out there?

Head gasket. Free car, almost free head gaskets at 7.62 per side! Invest 4 hours and 15 bucks.....do the $12 belt while you in there. It may have torque to yield head bolts, beware.
1996 CHRYSLER CONCORDE 3.5L V6 Cylinder Head Gasket / Head Gasket Set | RockAuto
1996 CHRYSLER CONCORDE 3.5L V6 Timing Belt | RockAuto