So the other day I am driving down some old country roads going for a nice cruise enjoying the weather. As I was going around a corner I heard a couple small pops coming from the tail pipes that raised the hair on the back of my neck. So I looked in the rearview mirror and saw white/blueish smoke coming from behind the car. So I coasted to the next road I could turn on turned the car around and turned it off. I thought I had blown a head gasket... but I checked the oil and it is just as normal. I checked all round my entire engine and I cannot find it leaking a single drop of anything. All fluids are as they should be. Nothing mixed, all right levels.. blah blah blah. No funny noises or anything like that. Only thing wrong I know of with the car is that the imrc's do need to be cleaned. Any ideas on what could have happend?