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No. The expansion tank will not let coolant drain into the radiator. Doing this will cause the whole system to be clogged up. WHO POSTED THIS MISSINFORMATION. OPEN A REPAIR MANUAL BEFORE YOU ANSWER QUESTIONS.

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โˆ™ 2006-03-23 17:23:38
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Q: I have a coolant leak on a 1996 Mercury Sable Since there is no traditional radiator cap can the additives that are supposed to stop coolant leaks be added to the expansion tank?
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