Hello everybody, this I my first post and I am hoping someone out there can give me some information before I have my 2012 defender 90 hard top with 8,000 miles on the clock towed down to my local dealer on Monday. Driving home yesterday I smelt burning and a sensation that something was going on under the bonnet. PULLING OVER there was steam coming from the coolant tank and the remains of what looked like an explosion from the cap all over the engine in that area. Still a strong smell of burning. It looks like an emulsion of oil and water had come from the cap when it blew although the cap was still on. Not being particularly mechanical minded I put a small amount of water in the tank and limped home a few miles. When returning I washed down the residue from the engine and it is now stood outside. The engine temp was still showing as normal however. I phoned my local dealer who said it could be the head gasket ! Any help appreciated. Thanks.