What do people think has caused this. 2nd Cyclinder from the left. Looks a little bit crusty down into the hole also. Is it water ingress or a bad coil etc
Afternoon, I had this same problem but much much worse. mine had about an inch of water in there ! Mine was a combination of oil leak from rocker bolts and I think a leak from the washer jets. O rings on the coils were all mis-shapped due to oil contamination and then the water got in to the spark plug holes. Its new coils to get the o rings as not sold on their own. I cleaned mine up and with a drop of super glue they fit and seal now. Hope this helps
just water ingress, well know how useless the seal is, you really need to be into these coils every 6 months or so just keep on top of any water that's made its way down hole
