I couldn't identify a dieseling sound because of all the squeaking noise.

If the engine ran for some time after the radiator burst the water pump could have been damaged and is just now showing symptoms. Since both sounds you hear popped up at the same time I'm going to assume they are connected, when you fix the squeaking the diesel sound will also be gone.


As previously mentioned, I would remove the belts and spin anything belt driven looking for one that doesn't turn freely with primary focus on the water pump. If you don't find anything wrong then I would run the engine for no more than a minute or two to see if the sound is gone.

Based on what I can hear it does not sound like it is internal.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas