1998 Plymouth Voyager Coolant Overflow losing coolant

1998 PLYMOUTH VOYAGER
12,000 MILES • 6 CYL • FWD • AUTOMATIC
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MEINDERS
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about every 2 days coolant from overflow empties out, checked radiator and it would be full, I do not see any visible leakage. Why?

3.0 liter engine
Dec 22, 2008 at 6:29 PM
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ZACKMAN
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Check your engine oil to see if it has "milky" substance. How about your antifreeze in the radiator. Do you see any evidence of oil in it? Perform compression and leak down test to verify that the head gaskets are not leaking.
Dec 24, 2008 at 1:23 AM
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MEINDERS
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I do not see any issue with oil in the antifreeze, or, and no milky color in the oil.
Dec 25, 2008 at 12:08 PM
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ZACKMAN
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Then, perform compression and leak down test to verify that the head gaskets are not leaking.
Dec 25, 2008 at 5:36 PM