I was driving my car the other day (1997 528i) and the temp gauge started heading toward the red. I immediately stopped the car and shut off the engine. I turned the key back on a couple times and the gauge was in the red and the light was on. The car cooled down and I drove it home, it was still in the ok range, but getting hot, when i got home. I again shut it off and it went into the red. The car was never running with the gauge in the red and the gauge wasnt pegged, it was just half way in the red. Im really concerned that the head gasket could have gotten messed up, How likely do you guys think this is? Thanks for any input!