Trying to determine if engine is shot or just blown head gasket? I have an 05 Volvo s40, 142k miles on it......Engine died while driving on interstate...towed car to dealer and they advised that the engine was shot? They think engine ran out of anti-freeze and then locked up.......brought car home and pulled plugs, engine turns over so I drained oil and filled radiator to confirm whether their was a water leak, and blown head gasket.........long-story-short, water ended up filling oil pan and the lower anti-freeze/water line (connecting into engine) leaked a lot of water................ I think the lower anti-freeze line burst and leaked all of the anti-freeze out. Therefore, engine over heated and blew head gasket....there was also a considerable amt of oil that ran down the back side of the engine, and seemed to come from the timing belt area. Oil was also puddled in the oil cap ?

Any thoughts on whether this engine is shot, or where the oil came from. plus, there are concerns of internal damage to rings, if heat got so hot that it stalled while driving ....

thanks! Ron