Bmw Coolant In Oil

BMW dealer suggested it was AT oil leaking into the coolant via the AT oil cooler (at the base of the expansion tank). FYI, quoted repairs from the BMW dealer included changing the radiator, both hoses, water pump, thermostat, AT cooler, and doing a coolant flush and fill and an oil/filter change, for $4,300. The oil filter housing gasket on these cars is a known failure point.

The oil filter housing also contains an oil cooling passage for the coolant. When this gasket fails it can sometimes allow oil and coolant to contaminate each other. N52 are not known for blown head gaskets unless they are utterly abused by their prior owners.

I would get the oil filter housing gasket check before jumping to. Yet another n55 oil in coolant thread. All times are GMT.

The other day the low coolant light came on and when I looked in the expansion tank the coolant was an oily/off white color. My first thought was the head gasket however the engine oil is at the proper level and color (no coolant mixing). Tags 335i, e90, head gasket, oil housing gasket, oil leak « Previous Thread Next Thread.

Oil filter housing gasket is leaking engine oil into cooling system. Flush the system with water and dawn (let engine get hot) then just water then coolant/water Mixed. I'm seeking some help and advice from other members and properly diagnose oil found in coolant.

It all started out with leaking coolant from water pump which is fixed recently but I'm still seeing more and more milky brown layer of oil in my expansion tank. Some member suggested that I should. Bigger issue if you have coolant in the oil tho.

BMW E34 Touring 92/8 525/5 Electrical black sports leather, 3.73 LSD. Black on black BMW E30 Touring 89/3 325/5 Manual black sports leather, 3.91 LSD. Diamond Black on black - From sweden yah b0rk b0rk b0rk - 12-24-2011, 07:58 PM #6 shogun shade tree mechanic Moderator.

The radiator is pumping out clean antifreeze while the coolant in the tank is still chocolate milk looking? Not losing oil or coolant, not running rough except a jerky acceleration between 1000-2000 RPMs and no smoke. Ideas? HELP! Oil in coolant system and dealer won't fix! HELP! Oil in coolant system and dealer won't fix!