Running hot!

On a really warm day, and we dont see them very often in Sweden, my Duster runs to hot, today it went close to 212. Take a look at the picture, my fan is almost 3" away from the raditor. How close is optimal? It's a little 273 by the way.

I havent really had the problem before, because it is rarely this hot here during summer.

I would start by adding a spacer that gets you within an inch or less of the radiator, and adding a shroud. maybe also get more and/or bigger fan blades. That fixed a similar problem I was having. If issue continues, then consider moving on to puller and/or pusher fans. Good luck.