i just sold a97 4.6 that i had replaced th heater core in twice since january so i traded for a screw and now the heater core has began to leak, i think. i have acompany truck to drive so i dont have to drive mine often question is will there be any moisture on the windowif it has rained hard and it has just sit? i drove it for about an hour this evening then parked it then i noticed a little moisture on the passenger side of the windshield. i just cannot take changing another one of these. anyone ever have just a little moisture but no heater core problems? the truck sometimes sit for 2 weeks at a time. i wish i could afford a super duty and i would send this truck down road