He should be able to use a chemicial tester that has a rubber cone on the end of it that goes into ur coolant bottle they put chemicials in it start the vechile if it turns a certain color then it means u have exhaust gases in ur cooling system meaning u have a bad gasket or head. Or it may just be leaking visually. Hope that answers ur question.
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Tuesday, March 30th, 2010 AT 3:27 PM