went offroading with some friends for about 10 hours, today. lots of fun. but, ended crappy. not long before we left, there was a faint tick that improved after i added a little oil. but, on the way home, it started burning oil, bad, and as i was pulling over to check it out, the tick came back and before i could even exit, the engine stopped turning. i had it towed 100 miles to dallas (on my friend's AAA membership) and am taking my pickup out there tomorrow to tow it the rest of the way home. we are thinking i may have dropped a valve (or part of one) into a cylinder jammed between the piston and head, or piston and cylinder wall. does that sound about right? if that is the case, i expect a lot of damage to the piston, head, and cylinder. any experiences with this? are we way off on this? just glad the k5 isn't my dd.