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Check your oil and see if it's milky. If it is then it's leaking inside. Does it steam out of the tailpipe? If it does you have a bad head or head gasket. have you replaced the thermostat? if you haven't, do that first, it may be stuck closed.

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Q: What causes a 1997 cadillac deville to overheat you have changed the radiatorwaterpumpfans and the coolant disappears and does not leak and still overheat?
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