[Floridian]

When I had the radiator , thermostats,  etc off I found no filter anywhere. 
My fan belts were in really bad condition,  check your belts while cleaning the radiator. 
I use Final Charge coolant. 
I also added a Max Tow digital / analog temperature gauge,retaining the original temperature gauge and sensor .
I find that the original gauge indicates higher temperature than the Max Tow .
Chris

Great info, thank you so much for that.
I cleaned the radiator yesterday, I used steam and some dawn to remove any grease that could be in there. It was still in pretty good shape from my last time I did it (annually)

I didn't know about that gauge, thanks for sharing that info!. I used another analog to digital conversion gauge to monitor the temps, it only went 5 degrees higher but I don't want that to keep climbing so I just wanted to make sure everything was OK before it is an issue. 

Fan belts still going strong, I checked the three of them and the looked good and no slack.

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Might be the coolant & radiator are fine & the fan belts just need a little more tension.

When my fan belts were loose, the coolant temps went higher than usual.
Sometimes, when loose, you could hear them 'bark' when raping the throttle.

If you can turn the fan by hand - they are too loose. . .

When I use the steamer on the radiator I couldn't move the fan by hand at all but I didn't try to force it enough to check that, that is a good check I will need to do. Thanks for that pointer!

Is not a big change but I'm super concerned with temp increases with my 8V92 to shorten his life or completely make it useless and go the re-power road.

Thank you so much for sharing your thoughts on this.