if i have a bhg on a 7mgte wat sorta things can i noticed that will change ??...will the temp gauge go straight up ... ?or will it some times border line then about 10 mins later go up ? it doesnt always overheat..on hot days it is more prone to ..it has a hks metal head gasket..so could be the thermo fan or the thermostat ? what do u fellas reckon..sometimes it owont even over heat ??