Hello I'm new to this site and I have a few questions that I cant find the answers to.I have a 86 ford bronco with a 5.0 Efi moter I got it hot a couple of months ago towing my camper over a mountain it started missing and sputering and acting like it had no power at all.It never overheated to the point of steam or breaking down but when I cut it off to keep it from overheating it would not start again acted like it was locked up or really like the battery was dead.I waited for about 20 minutes and it started right up came back home with it and it did the same thing but never actually overheated just got hot. now it does it every time I take it out. mechanic tol d me it could be blown head gasket,or it could be hydrolocked??? never heard of that.I have another moter but want to know if there is anything I can do before changing the moter.I have replace the t-stat,water pump is good,and radiator is good.any help would be great. Thank you.