another electric fan question

I'd use a temp gun to check for cold areas across the rad, that'd indicate if the rad has plugged tubes,, or I used to feel for cold areas with my knuckles touching across the front of rad at running temp.

The bigger the cool area,, the bigger the prob..

If it's hot all the way across,, I'd wait and see..

If you have a temp gun,,when up to temp., shoot the top and bottom rad fittings ., there should be min. 40* diff between the two..

It's lived all these years without an elec fan,, so it shouldn't need one now, unless something else is at fault.

jmo