Though I've searched archived posts, I am not yet convinced that I need> to change my radiator, so here 'goes...>

I have a '91 L-series with an EA82 motor. I run the car with> concentrated coolant and oil at the proper level (though in need of a> change). Air temp is around 70F. The rad appears to be in acceptable> shape, though a circular section the size of a cooling fan is slightly> damaged. There is one cooling fan, though a friend of mine suggested> that there may have been a second fan on the car at one point, and that> it may have actually caused this damaged section of the rad. Could> this be?>

While driving in the city or at highway speeds (65mph in 5th gear), the> temp gauge sits at about 50% (in the middle of the 'normal' range> indicated by the gauge). If I drive at 60mph in 4th gear for a few> minutes (once the car is at running temperature), the gauge goes up to> 60%. If I've been running for a while, stop at say a traffic light,> then accelerate reasonably 'hard' so as to bring the revs up to what> I'd guess would be 4500 rpm before changing gears, the temp gauge also> goes up to 60%. The other day I did some 4W-driving through deep sand> where I had the revs in the 3500-4000 rpm range for a few minutes, the> gauge got up to say 75%; after driving conservatively for a while the> temp was back to normal in less than 5 minutes.>

Do I need a new rad? If so, the archived posts suggest I get an old> Subaru rad. Do I need to find one that was running on a similar '91> L-series, or any model that had an EA82, or are there other options> that would open the door to more prospects?>