Question about 2000 BMW 3 Series

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Reddish oil in radiator and becomes milky when water is thrown into radiator.Oh by the way my car is a 2004 318i

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The tranmission oil cooler inside the radiator tank is leaking most likely, pull the radiator out and have it repaired or replace the radiator.

Posted on May 12, 2010

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97'Saturn substance that looks like oil has filled up the tank where I put antifreeze.Started off like a moca,milky substance leaking on the ground pretty bad,so I had radiator replaced & now...

So sorry to hear of this Problem, But You have either A head Gasket that has Acquired a Crack or A crack in the Engine Block somewhere between the Cylinders and an Oil port. this is what will cause Milky Oil in the Coolant reservoir/overflow tank, if the color is More Brown then it is Definitely engine Oil if it is Reddish then it is a trans coolant leak But since You say you replaced the Radiator then My money goes to and Engine Problem, You nee to See a Professional Mechanic shop to have the System Pressure Checked, And The Oil Dipstick checked, if You have Milky foam on that stick then You will have narrowed down the Problem

Mar 28, 2015 | Saturn SL2 Cars & Trucks

1 Answer

Coolant loss with no trace

Doesn't sound good at all. If the water is not running out on the ground on the floor, it can only be going into the engine or out the exhaust pipe. Have a look at the oil dipstick and see what level the oil is at. If you add water and the level increase, you know the water is going into the engine. If this happens, it turns the oil a milky white. Get it fixed fast before it destroys your engine. The other end of the car, check the exhaust pipe and see if water is coming out there. These faults indicate a cracked head, blown head gasket or blown water jacket. the last thing to check is if your car is an automatic with an oil cooler in the radiator, it could be filling the auto transmission with water... Another disastrous thing to happen... If there is any reddish coloured fluid in the radiator or if the transmission fluid has gone a milky brown colour, that could be the problem. Either way, hidden losses of coolant usually mean major repairs...

Jul 04, 2014 | 2001 Mazda Millenia

1 Answer

I have a 2010 hummer h3 that has a milky color in the radiator we checked all the fluids the engine oil is fine but the transmission fluid is barely touching the dipstick what could the problem be ...........

Milky colour in the radiator means that the engine has overheated and the head gasket is blown and might need replacement after skimming the cylinder head.The milky colour is oil in the engine mixing with water that cools the engine

Dec 26, 2012 | 2007 Hummer H3X

1 Answer

What causes radiator water to be milky looking chrysler pacifica 2006

It could be an oil leak in your head gasket. when oil and water mix in your motor the result is a milky grey substance, I have only seen it in the block oil pan, not the coolant resevior.

Aug 26, 2012 | 2004 Chrysler Pacifica

1 Answer

Milky substance in the radiator

You have oil entering the radiator and when combined with water makes a milky substance. Oil entry is normally through a defective cylinder head gasket.

Feb 15, 2012 | 1990 Geo Prizm

2 Answers

Milky oil will not start

milky oil is bad, it probably means a blown head gasket or a cracked block-because it won't start, I'd lean toward the cracked block, but I don't know the car's history-what led up to this? Was it badly overheated recently? No matter what, if you even think it might start again, drain what is in the crankcast, antifreeze kills bearings-not like water is better, but if you drain the anitfreeze too, and fill it with water, and do a pressure test on the radiator, you can find out how bad it really is-good luck.

Jan 27, 2011 | 1997 Ford Aspire

1 Answer

I have a 94' honda accord lx 4cyl (stick), the radiator coolant was a reddish-brown, so I called pep-boys for advice. They said to disconnect the top and bottom hoses and flush the radiator first, then to...

Check your Tail Pipe to see if there is any water coming out of it. Also, Pull your Oil Dip-Stick to see
if there is any moisture on it, or if the Oil has a milky appearance.
Let me know what you discover.

Best Regards,

The Wrench

Oct 11, 2010 | 1994 Honda Accord

1 Answer

Milky oil in water but car runs fine

This is classic case failed head gasket. You changed your oil 4 years ago?

There is more to this story I think. Maybe you changed the transmission oil 4 years ago and and now you have water in the trans? Not good. You have trans oil in the radiator? Not good. You have engine oil in the radiator? Not good. You have water in the engine? Not good. You have engine and trans oil in the radiator? Doubble not good.

You should have a reputable shop take a look at your 22 year old car to see if it is salvagable.

Mar 09, 2010 | 1998 Audi A4

2 Answers

I have oil in radiator ,transmission slips

Does the oil in the radiator look reddish? likely it does...You most likely have a failure inside the radiator where the trans cooler coil runs through it. Replace radiator and have trans fluid changed and flushed. If slipping continues trans will need a rebuild. (hope not)

Apr 01, 2009 | 2000 BMW 3 Series

2 Answers

Water heating radiator and water expulsion oily reddish color

Sounds like you have transmission fluid in the antifreeze. The transmission cooler might be leaking in the radiator. If it is, replace the radiator.

Mar 26, 2009 | 1996 Ford Explorer

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