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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 10-30-2014, 01:33 PM   #1
Registered User
Join Date: Sep 2010
Location: Tucson
Posts: 124
My Ride: 330ci
Question regarding cooling fluid in oil NOT MILKY

Hey guys hoping you guys can give me some help/insight...

I recently bought another E46 325i, automatic, 134k miles...

As soon as I bought the car I changed the oil "dirty but looked fine"... I noticed a leak from the expansion tank I changed it out with a "Meyle" expansion tank from BMA. The car was still leaking, so I changed the top expansion tank/radiator hose and changes out the thermostat "Meyle" too. (During this time I did not drive it) Car was still leaking, but the leak is odd to me??? Car will leak right sometimes but also a few hours later and sometimes even the next day???

After changing out the thermostat and the car not leaking, or so I thought. I drove the car to work... I noticed after lunch there was fluid on the ground and it was still leaking... DANG IT! I checked the new oil "dipstick" and the oil has cooling fluid in the oil, but it's not milky just an obvious blue color to it from the BMW radiator fluid. Car run's fine, but there is an obvious issue. I instantly thought a blown head gasket, even though I never ran it hot... Why isn't the oil milky? Could this be another less expensive issue? I am currently out of town on business, but I am wondering what this issue could be. Before taking the car to a mechanic for a compression test, I want to be fully educated on some of the possibilities...

Thanks in advance for all your guys help...

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