Spark Plug Oil Troubleshooting and Preventive Measures

If oil persists in the spark plug threads or plug wells over an extended period, it becomes a significant problem. This can lead to several issues. Spark plug tubes harden where they meet the valve cover. This will allow oil to pass over time. You might be able to reuse the valve cover but ... There is a rubber seal like an o-ring for each spark plug. These can fail in normal use and need replacing, the cam cover needs to come off for ... oil in the spark plug tube indicates that the tube seal has failed. The only way to resolve this is by replacing the valve cover itself as well ... It's not a big deal but you do need to identify and correct the cause of the leak (needs plug tube seals and quite possibly the valve cover gaskets). Oil can deteriorate sparkplug leads and the boot that goes over the insulator of the sparkplug. This can result in missfires. I've replaced the gaskets on my 5.2 V10 twice now and still fight oil leaks in the spark plug wells. It's a on going battle. If anyone has tips or tricks to ... If theres still oil in the spark plug hole it's the valve cover gasket. It's a very common issue and a quick and easy job. Most likely you leaking oil through this gasket down into the spark plug well. Check this 1st. if that is the problem just get some gasket sealer and repair it. Spark plug tube seals are starting to dry up and let oil by. Buying a valve cover gasket set will give you new tube seals along with cover ...