im having some issues with my motor im getting coolant leaking out from the back of my cylinder intake side just a lil bit between the head and cylinder.then ist also coming up out through a couple of studs.but im wondering if im getting any coolant in side the cylinder its self what should a plug look like when running sunoco 10 im clear up to a 195 main and stock cylinder punched out to a 310 b8es plug and ist burning like a light goldish brown color i always thought a darker brown was the best so if im getting coolant in the cylinder what would that make the plug look like or is it just that way from running 110 ?