Quote:
Originally Posted by stevenponec
Wouldn't a grill dam block the air intake to cool the engine?
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Some of it, and that's the whole point.
You normally don't need all the cooling capacity that was built in to cope with the worst possible conditions, like desert climates.
Hence you can block off a good part of it - watch the engine / coolant temperature though when doing so.
That way you block a sizeable part of the airflow through the engine compartment, which is causing drag and cooling down your engine more than necessary (especially in winter).
Usually the lower grill has more air going to the radiator, and the top grille is well, pretty useless in more moderate climates
