Ford F150 Forums - Ford F-Series Truck Community. - Motorcraft Fine Wire Platinum Plugs

Quote:

Originally Posted by danthurs (Post 1165)

I just looked at the link, and what it shows does look very much like what you have. Here are the examples I go by. http://www.verrill.com/moto/sellingg...colorchart.htm And here normal is clean. I guess it comes down to personal preference. I learned that plugs are clean, if not you find out why. Plugs can tell you just about everything about your engine, if you just know what to look at. I really like your observation about the electron flow and wear on the electrodes. And as I said, it's not something I would be worried about. But if I were to say pull my valve covers for some reason, I would change out valve seals. But that's just me. :thumbsup:

Thanks for your suggestion Dan! However, if you look at your "normal" example, the electrodes are not eroded, so there is very
little mileage on that plug. "Normal" combustion deposits will accumulate over time, which is what you are seeing on my plugs, with 103K miles.

This is the reason the longer you run the 2004-2007 5.4L, the more carbon will build, increasing the probability of seizing and breaking.