Santa Fe FWD V6-3.3L (2009)
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Start engine and let it run until it warms up. (until the radiator fan operates 3 or 4 times.)
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Turn Off the engine. Check the level in the radiator, add coolant if needed. This will allow trapped air to be removed from the cooling system.
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Put radiator cap on tightly, then run the engine again and check for leaks.