I have a 92 honda accord that overheats I replaced the thermostat and fans run 100% of the time. There aren't any signs of coolant leaks. It takes about 15 minutes before car to overheat. When the gauge reach the top it would go down a little bit but then when I got my fans to run 100% it doesn't go all the way up just above normal. Also my spark plugs have oil when I unscrew them not on the wires. Im thinking it might be the valve cover gasket. Those anyone have any idea of cause of overheating and by the way I changed the oil and old oil didn't look milky or anything like that the coolant level those not go down.