Anti freeze/coolant on my spark plugs

[500TPmech]

Any one know if the intake manifold can leak coolant and get it into the spark plugs holes. Started getting some missing today and pulled my left/driver's side plugs cause the OBD said missfire on #5. When I pulled the boots up off the spark plugs, there was coolant, I think it was coolant, half way up the spark plugs, just left side. Is there a coolant galley going along the intake manifold where the gasket could be leaking? My coolant level is not really low and the truck is not running hot. No noticeable change recently. Replaced the spark plugs couple weeks ago. It has rained here for three days straight and I washed the truck but never had this before. It sure had a slight smell of coolant. 1997 F150 4.6 litre W code. Thanks for any help !

[papajoemrt]

I know for the 5.4's that a coolant leak occurs at the rear of the intake which leaks into the sparkplug holes causing the cops to arc out and cause a misfire. might be the same thing here.