There are not visible leaks on the car. I drove it yesterday about 30 miles, parked it in the garage and went over the engine with a fine tooth comb. Could not find a leak anywhere and floor under car was dry. The only thing I found last night was a spark plug was very loose, could turn it with my fingers. They needed to be changed so I changed all of them this morning and made sure they were tight. The car belongs to my 16 year old daughter, and she can't help me diagnose the problem. I have been driving the car the last couple of days and I am having trouble diagnosing the problem. After changing the plugs, I drove the car about 20 miles, it runs fine and the temp never got about the half way point until I pulled it in the drive and let it run for about 20 minutes. The temp went up to the 3/4 mark on the gauge before the fan kicked on. It kicked off when it cot close to the 1/2 mark. Is this the normal operation for the fan? Could the loose plug have been making the car run hot and boil the water out of the plastic coolant tank? It looks like the insulation on the underside of the hood is stained where the coolant tank is? This leads me to believe that it is boiling out? There is no water in the oil and no white smoke of smell of antifreeze coming out of the tail pipe.
I read in another post where someone else had loose spark plugs and it made the car run HOT? Is this possible and how?????
Thanks guys.......
