Originally Posted by claviz13
Hey everyone. Good to be here. I got a 97 F-150 4.6L with a problem. The #6 spark plug galley keeps filling up with coolant every few months and causing the cylinder to die. I have to pull the plug and dry it off then it's fine for a while. I'm thinking head gasket or a crack somewhere. I can't see much when I look down the hole. It's not coming from above. Anyone else have a similar problem? Any help would be great. Peace!
Look at your heater hoses really close. The F150s had a problem with them leaking into the spark plug holes exactly as you are describing. It would be really hard for a head to leak coolant into them.