No, I haven't (yet)
I pulled the heads to check for a blown headgasket or cracks in the head but I found no visible clues.
The long story:
I was driving home from the 'middle of nowhere' at 03 in the morning when the car suddenly got very hot. I pulled over and checked the coolant nad it was empty. OK, a blown gasket was my first tought. As I was alone on the road I figured I had to get home (didn't feel like walking..) so I filled up the radiator with water from a nearby creek while the engine was running, almost a gallon of water. I got in the car and drove 3-4 miles and the engine was running hot again. Pulled over and checked; no water. Re-filled the radiator as mentioned earlier and the same thing happend again. I refilled the radiator every 3-4 miles all the way home. Feelt like I was driving a steam train:-\
I was expecting a major leak in the headgasket or a cracked head when I pulled the heads, but I found nothing?? Is there any other faults that could produce a result like this? I noticed that one of the bolts holding the cam was turned blue.....
I also found one valve retaining clip in the oilpan when I checked with my finger in the drain plug. None was missing on the valves. Anywhere else inside the engine where a part like that is used?
(sorry if my english is a bit off, my language is Norwegian.)