Quote Originally Posted by -SkInNy-
see if there is any filmy oily stuff ontop of the coolant when you open the radiator.... if so a headgasket leak
true!

another symptom of a blown headgasket is the coolant looking milky or bubbles when the engine is running.

Perform a compression test on all cylinders, and be sure to post the results.
You may also have burnt some valves.

-jonathan