Hi Folks! My dad is having problems with his 2002 ranger. Its the Temp: gauge whenever you start the truck the temp gauge goes all the way to the very hot area and then it drops to the normal range obviosly when the gauge gets that high the check gauges light illuminates but then goes off.But actually she is not overheating.Any help will be highly apreciated.This one is ecuiped with a 3.0 v-6 engine.Thanks in advance.