Thanks MCTwin:
I will try the plug wetness check tomorrow!
I do know that prior to the heater core bursting, I used to hear a boiling sound in the dash area (core area)..and there is always pressure on the cap when I check it, even after a couple hours sitting..but I dont know if I would classify it as "alot" of pressure. In any event, I will check the plug for wetness next time after I run it, and see what I find. I guess maybe a couple hours after I shut it off should be long enough huh?
Thanks again.
