Motor oil instead of antifreeze/coolant

2004 BMW 318I
87,000 MILES • V8 • 2WD • MANUAL
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FREEPOG
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  • 1 POST
I have topped up my antifreeze/coolant tank with motor oil by mistake this evening at home (2004, Petrol engine BMW). I am wondering what the implications could be and appreciate any advise.
May 3, 2011 at 12:24 PM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
That is going to be very difficult to get back out. If you haven't started it yet, remove the reservoir and clean it out thoroughly. If the engine has been run, you are going to have to drain all the coolant, fill it with water and add some dish washing liquid. Run the engine and flush it thoroughly with water. Repeat if necessary and then refill with coolant. It may have to be repeated a few weeks down the road.
May 3, 2011 at 1:41 PM
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