Today I was messing around with my 94 civic 3 dr. And I noticed that the coolant bottle was bubbling when the engine is running. It runs fine and does not smoke but the coolant seems to be going somewhere. I remoned the spark plugs one at a time and found one of themwas wet with antifreeze. I am thinking head gasket. What do you guy's think?................Rich

 

if there was coolant on your spark plugs then the head gasket is definitely your culprit.
does the antifreeze look like it has oil in it, and does the oil look like it has antifreeze in it?

 

I really can't tell. But I don't think so. And like I said, It does not smoke either. Just the bubbling in the resevior and in the radiator if you take the cap off and look inside.

 

yea a blown head gasket could cause your coolant to boil
i think it's your head gasket