Good evening to you all. Thank you for welcoming me to your forum. I have a problem with my 2006 Jaguar X type 2.5 V6. I found the holes in the valve cover powdered with metal missing, as you can see from the photos. I decided to change the coils, spark plugs and valve cover because I believe it is an electricity problem from the coils. Some say it could be overheating. But to me they are not overheating. What do you think? Thank you