I could tell you specifically if the engine was newer, however my guess would be start to get concerned at 200F, and pull over as you get near 210. Straight water boils at 212 at sea level, however a 50/50 mix is 234F. add a few PSI for the pressure cap and the boiling point is higher.

Just to be on the safe side, I would add a fan shroud which will make a world of good by simply making sure the air is being pulled thru the radiator vs 50% of it swirling around the fan.

Scott


The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me