Pmizell,
Sorry to hear about your engine. I think 1 hour is far too much to let the X-66 soak in it. But what's done is done, I would suggest you do an oil change now. Flush the old oil thoroughly, fill with new synthetic oil, replace filter, and voila, maybe the metal clanking sound will be gone! Just don't drive around too much with that old oil in there, I'm guessing pretty much of your carbon deposits is gone, but the extended soak has perhaps stripped away much of the protective lube coat.

Nevertheless, we all learn from mistakes. Thanks to Runningtoohot also for your advice. Like what you said, to anyone who is contemplating this job, please follow the proper instructions religiously.

Me? Should I count myself lucky that I couldnt get my hands on this nasty stuff?

Mervyn