X5 50i Terrible Grinding Noise & Hot Engine Warning
Actually sounds like it may be the pump for the intercooler system, check the small water tank directly in front of the engine and make sure it is full, you may also, if you have a scan tool, be able to test the intercooler pump directly and see if it grinds.
I believe the tank on the right fender well is for the engine and turbos directly and the small tank on the front of the engine is for the intercoolers specifically, both have their own separate pump.
2005 X5 4.4i (04/05 build date)
Titanium Silver w/Black Interior
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