Pull your dipstick and look at it. Does it look like a milkshake?(no don't drink it) Chances are if the head gasket has blown, the head needs resurfaced. Worst part of doing a head job is putting evrything back toghter only to realize, damn head was warped. Overheating, white smoke and dissapearing coolant are all signs of a bad head gasket. One from Honda costs from $60 for just the gasket to $150 for the gasket set(my price)