Originally Posted by rlcpe
.....cut.... Is this normal.?
I've found the doghouse in all Ford Class Cs I've driven get a little warm, but a lot more so when driving up long steep hills in warm weather. The engine can generate 3 or 4 times more power than when cruising on flats, which means a lot more heat under the hood area. Even if coolant temperature remains in spec, there is much more heat coming from engine and radiator.
The only time this was an issue for us was climbing out of Death Valley which required a lot of power/throttle, and speed was relatively slow (less air circulation). At one point my wife complained the doghouse felt uncomfortably hot, so I pulled over and let the engine idle for a few minutes to cool off, then proceeded a little slower to cut back on power.
If you remove the doghouse, you'll find there isn't a lot of room behind the engine for air circulation to take away added heat. Adding insulation may be a good thing, but I wouldn't go crazy adding so much that you inadvertently create a cooling problem.