[folivier]

If you want to test your radiator fix then take I-15 south from Great Falls to below Butte, MT.
Lots of 6% long climbs, with 45mph curves at the bottom of the descents.
I found out that my check engine light will come on at exactly 219 F. Once I pulled over the light went out, engine cooled right down, and continued on.
So what rpm should I run the series 60 on hard uphills? On my 8v92 at 2000 rpm the temp would stay steady, but this had the direct drive radiator fan.