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Coolant oil leak

(1990 BMW 750iL)
in North Port, FL on April 28, 2009
transmission oil in the coolant
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Popular Answer
The 750 has a transmission oil cooler mounted in the radiator. Engine coolant is used to take heat away from the transmission oil. It is the most likely place foe transmission fluid and coolant to mix. Continuing to drive the car will destroy the transmission and damage the cooling system hoses.
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