You could have a head gasket problem. The firs thing that you need to do though is put more coolant in like you did, then start the engine for a minute or so, then turn it off and add coolant again. Then let it get warm, then turn it off and let it cool off. Check the coolant and add if needed. Do this until it won't take anymore.
After you do this see if it still overheats. If so then I would start suspecting maybe a head gasket leak.
As far as the oil around the spark plugs. That probable is a separate issue and I don't think it has anything to do with the overheating.
SPONSORED LINKS
Friday, September 16th, 2011 AT 9:38 PM