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Old 12-29-2008, 05:57 PM   #3 (permalink)
aerohead
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holes

My guess is that they were included for drainage,should frozen precip. get in there during winter snow,allowing for a way out when melted by heat of radiator.Obviously they "vent" pressure ahead of the radiator.Consider your potential driving environment,and whether or not a little drainage might be handy.
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