Oil when mixed with antifreeze turns white in the radiator doesn't it? I have a greasy build up on the radiator cap and around the fill hole its dark and has th consistency of thick used oil could these be a blown head gasket?

 

More likely to see coolant in the oil....... (looks a lot like a chocolate shake from McD's.....)

Try this quick test..... When the engine is stone cold, radiator all sealed up nice and tight, start the engine. Squeeze the upper radiator hose, when the engine is cold, and should be fairly soft and pliable, if it is instantly hard, and under pressure, you have a problem.

 

Well if it is blown dont be stupid like me check your heads real good.I blew a gasket a month ago didnt check my heads come to find out I had a cracked head or burnt valves on cyl #4 now im spending 925.00 on some go fast heads.

 

Cool thanks ill try the test tommorow