I have a nissan patrol 2001. 3litre diesle I was driving home yesterday and there was a whooshing sound then billowing white smoke pouring out exhaust I pulled over and shut off engine immediately. Pulled the bonnet and the coolant was bubbling in overflow someone has told me I have blown a head gasket another say a piston and another say water in my fuel. The vehicle did not overheat and when I restarted the engine is missing and still blowing heaps of white smoke. I have just left it where it is until I get it picked up. Please help any suggestions. I have been googling and it seems this is a commen occurrence with these motors a fault in them 😰 I love my car want it back on the road.