i have a few questions about a 4.6 mustang my g/f just got,the guy we got it from said somthing was wrong with the fan,it only comes on when u have the heat or somthing on,but it is leaking at the water outlet on the intake,i put a new thermostat in it and seen that the intake was cracked right there and someone had put some j-b weld on it,it has a plastic intake,i dunno if that is a good fix for it,but a new one is like $250,it dont get hot or anything just driving normal,but the leak i think is causing all the problems,its not building up any pressure in the system.im wandering could i get a water outlet gasket for somthing else and put on it and put some silicone to stop the leak,cuz it only has a like an o-ring type gasket.i think it is building up pressure but its coming out that leak.and i dunno if this is causing the problems with the fan or not.can someone give me some help on this.cuz i have heard that the intake cracking right there is bad on 4.6's.