I am thinking about replacing/checking by Tensioner because I am hearing a droning noise when the truck is idling. Seems to be more prominent in very hot weather.
I understand this is relatively easy to do. I took a look under the hood, and there's a belt diagram that easily identifies the belt tensioner and indicates to use a 3/8" socket wrench.
However, it looks like there is not a lot of room to work. It is about an inch or inch and a half away from the fan. If I do get it out easily enough, is the new one hard to get in? Do I basically make the belt about as tight as it is now? Can I somehow test the tensioner after I remove it, perhaps seeing if it spins smoothly?