Oil in cooling water

[eslanek]

The other day when I went home and put the car in the garage, I saw the car pulling some water. Stop the car and lift the engine cap, I watched as the water poured through the coolant cap. I removed the cap of the coolant water and it came out like half a liter of blow. This was night, and I decided to look at it in the morning quietly.
In the morning I could see that the water that had been spilled on the floor had not evaporated, and when I touched it I saw that it was oil with water, but a very transparent oil. I have the impression, which is a broken head gasket, or an oil cooler problem. My car is a BMW Z4 e85 2.2i from 2005 with engine n54 and manual gearbox. I searched the right side of the radiator and next to the tank but I did not find the oil cooler. Can someone tell me if this model has an oil cooler, and where is it? You can also confirm me, if this is definitely a problem with the engine head gasket, or it could be another problem, thank you. Sorry for my English

 

[mmm-five]

Is that not simply the normal coolant mixture (which is a bit oily).

If you’ve opened your coolant reservoir whilst hot, I’m not surprised some was spilt.

 

[Mike6]

If the car was pushing out water then I would expect the heater guage was going into the red. Could be the water pump on the way out .

 

[Ewazix]

Are you sure the first water you saw under the car in a he garage wasn't simply condensation from the air conditioner, it produces a small pool in no time and causes most people a panic until they realise what it is. Water spurting out of a hot radiator is normal if you lift the cap, which is definitely not recommended!
Coolant is slightly greasy looking. Unless you had seen an overhheat warning I would top up the coolant and bleed the system and let it warm up gently. Do not drive it with low water or when overheating.
My guess is all will be OK, let's hope so

 

[mcbeee]

Are you sure the first water you saw under the car in a he garage wasn't simply condensation from the air conditioner, it produces a small pool in no time and causes most people a panic until they realise what it is. Water spurting out of a hot radiator is normal if you lift the cap, which is definitely not recommended!
Coolant is slightly greasy looking. Unless you had seen an overhheat warning I would top up the coolant and bleed the system and let it warm up gently. Do not drive it with low water or when overheating.
My guess is all will be OK, let's hope so

Ditto, coolant feels oily, most I’ve ever used has been coloured, green or pink etc, it’s also the same additive that some French put in wine and the Chinese put wherever they can get away with it, ethylene glycol. We are more likely to know it as Antifreeze, we use it a lot in Canada, a 50/50 mix or the car freezes solid in winter.