I have a toyota tundra 2003 v 8 and start it making a noise in the motor and open the hood and noticed that it was the fan that was moving alot but it doesn't do it when the truck is cold and sometimes when it has beeb turb on foe a while or used it sounds like it touches the radiator that how bad it is .
Thefan is working find theproblem is that it shakes when thetruck gets hot
If it is a mechanical fan, the fan bearing could have disintegrated from wear and heat. You need to service it immediately to prevent even more damage.