I ponder as to why the recently made 4 cylinder Ford engined cars suffer so much from water ingress causing spark plug/well corrosion, particularly front plug area. Engine heat would surely keep this at bay. Can only assume cars are left outside with cold engines in the rain or washed and put away without starting engine. Absolutely no signs of corrosion or water ingress found when changing plugs on my V6 Roadster with similar coil pack seals. The heads do sit at 30° from vertical though
I did add silicone grease to lips of coil pack seals when replacing though.
