Deleted member 9101
If they run at higher temps then they need less radiator, not more. If the engine is more efficient it also needs less radiator.
Crash standards have nothing to do with hood height.
BTW, since this is the Frontier thread, they are using the exact same motor they used last year, so I don't think they needed a taller hood to accommodate it. It's all style, man!
Lol... I don't think you realize exactly how much heat a modern engine is capable of producing and how fast it makes it. Part of the reason modern engines make the power that they do with lower emissions is their ability to very efficiently and safely regulate their temperature, part of that is having a large radiator. The radiator on my 2500 w/6.0 at work dwarfs the radiator in my buddies F350 w/460. Hell, the radiator in front of the 2.7 in my F150 is larger than the ones put in front of V8 powered trucks a few years ago.
Crash test standards have a lot to do with hood height, especailly in body on frame designs.