I am recently having coolant problems. I switched from Evans to 50/50 Dexcool. Then I reviewed that the oil temp needs to be in the green at 190-230. So I put some tape in front of the oil cooler which is in front of the radiator. Oil temp now stays around 200-210 and the CHT is in the green around 200-230. Now the engine overheats in that it spits coolant thru the spider tank overflow tube into the overflow bottle and out the vent hole in the bottle. Before I had no problems with no tape on the radiator, CHT in the green BUT oil temp stayed in the 160 range and never got hotter. Scratching my head on this one other than accepting the lower than recommended oil temp.